uu.seUppsala University Publications
Change search
Refine search result
1234567 1 - 50 of 783
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 1. Abbott, Jessica K.
    et al.
    Innocenti, Paolo
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Chippindale, Adam K.
    Morrow, Edward H.
    Epigenetics and Sex-Specific Fitness: An Experimental Test Using Male-Limited Evolution in Drosophila melanogaster2013In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 8, no 7, p. e70493-Article in journal (Refereed)
    Abstract [en]

    When males and females have different fitness optima for the same trait but share loci, intralocus sexual conflict is likely to occur. Epigenetic mechanisms such as genomic imprinting (in which expression is altered according to parent-of-origin) and sex-specific maternal effects have been suggested as ways by which this conflict can be resolved. However these ideas have not yet been empirically tested. We designed an experimental evolution protocol in Drosophila melanogaster that enabled us to look for epigenetic effects on the X-chromosome-a hotspot for sexually antagonistic loci. We used special compound-X females to enforce father-to-son transmission of the X-chromosome for many generations, and compared fitness and gene expression levels between Control males, males with a Control X-chromosome that had undergone one generation of father-son transmission, and males with an X-chromosome that had undergone many generations of father-son transmission. Fitness differences were dramatic, with experimentally-evolved males approximately 20% greater than controls, and with males inheriting a non-evolved X from their father about 20% lower than controls. These data are consistent with both strong intralocus sexual conflict and misimprinting of the X-chromosome under paternal inheritance. However, expression differences suggested that reduced fitness under paternal X inheritance was largely due to deleterious maternal effects. Our data confirm the sexually-antagonistic nature of Drosophila's X-chromosome and suggest that the response to male-limited X-chromosome evolution entails compensatory evolution for maternal effects, and perhaps modification of other epigenetic effects via coevolution of the sex chromosomes.

  • 2. Adamik, Peter
    et al.
    Emmenegger, Tamara
    Briedis, Martins
    Gustafsson, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Henshaw, Ian
    Krist, Milos
    Laaksonen, Toni
    Liechti, Felix
    Prochazka, Petr
    Salewski, Volker
    Hahn, Steffen
    Barrier crossing in small avian migrants: individual tracking reveals prolonged nocturnal flights into the day as a common migratory strategy2016In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 6, article id 21560Article in journal (Refereed)
  • 3.
    Ah-King, Malin
    et al.
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Arts, Centre for Gender Research.
    Ahnesjö, Ingrid
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Problemet med "könsroller" kvarstår2013In: Tidskrift för Genusvetenskap, ISSN 1654-5443, E-ISSN 2001-1377, no 1, p. 136-137Article in journal (Other academic)
  • 4.
    Ah-King, Malin
    et al.
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Arts, Centre for Gender Research.
    Ahnesjö, Ingrid
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    The "Sex Role" Concept: An Overview and Evaluation2013In: Evolutionary biology, ISSN 0071-3260, E-ISSN 1934-2845, Vol. 40, no 4, p. 461-470Article, review/survey (Refereed)
    Abstract [en]

    "Sex roles" are intuitively associated to stereotypic female and male sexual strategies and in biology, the term "sex role" often relates to mating competition, mate choice or parental care. "Sex role reversals" imply that the usual typological pattern for a population or species is deviates from a norm, and the meaning of "sex role reversal" thus varies depending upon whatever is the usual pattern of sex-typical behavior in a given taxon. We identify several problems with the current use of the "sex role" concept. (1) It is typological and reflects stereotypic expectations of the sexes. (2) The term "sex role" parses continuous variation into only two categories, often obscuring overlap, between the sexes in behavior and morphology, and variability in relation to ecological circumstances. (3) Common generalizations such as "sex role as seen in nature" mask variation upon which selection may act. (4) The general meaning of "sex roles" in society (i.e. "socially and culturally defined prescriptions and beliefs about the behavior and emotions of men and women") is contrary to biological "sex role" concepts, so that confusing the two obscure science communication in society. We end by questioning the validity of the "sex role" concept in evolutionary biology and recommend replacing the term "sex role" with operational descriptions.

  • 5.
    Ah-King, Malin
    et al.
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Arts, Centre for Gender Research.
    Ahnesjö, Ingrid
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Vad kan vi lära av biologisk forskning om “könsroller”?2012In: Tidskrift för Genusvetenskap, ISSN 1654-5443, E-ISSN 2001-1377, Vol. 6, no 4, p. 51-56Article in journal (Refereed)
  • 6.
    Ahnesjo, Ingrid
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Craig, J. F.
    The biology of Syngnathidae: pipefishes, seadragons and seahorses2011In: Journal of Fish Biology, ISSN 0022-1112, E-ISSN 1095-8649, Vol. 78, no 6, p. 1597-1602Article in journal (Other academic)
  • 7.
    Ahnesjö, Ingrid
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Bokrecension av Retorik för naturvetare: skrivande som fördjupar lärandet2014In: Högre Utbildning, ISSN 2000-7558, E-ISSN 2000-7558, Vol. 4, no 1, p. 83-85Article, book review (Other academic)
  • 8.
    Ahnesjö, Ingrid
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Equal Opportunity for Sexual Evolution2011In: BioScience, ISSN 0006-3568, E-ISSN 1525-3244, Vol. 61, no 8, p. 641-642Article, book review (Other academic)
  • 9.
    Ahnesjö, Ingrid
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Mate Choice in Males and Females2010In: Encyclopedia of Animal Behavior / [ed] Michael D. Breed and Janice Moore, Oxford: Academic Press, 2010, p. 394-398Chapter in book (Other academic)
    Abstract [en]

    Finding a ‘dream mate’ is important for fitness in many sexually reproducing animals because half the genome of the offspring will come from this mate. Individuals that choose their mates carefully may gain both direct benefits (i.e., good care, territories, and other resources) and indirect benefits (genes that improve offspring viability or attractiveness). Mate choices occur in both sexes and the same individuals can be both choosy and competitive. Mate choice and mating competition often result in sexual selection and the evolution of secondary sexual characters. Mate choice is interactive, context dependent, operates on multiple traits, and varies in time and space.

  • 10.
    Ahnesjö, Ingrid
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Evolution. Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Seahorses and Their Relatives2010In: Journal of Fish Biology, ISSN 0022-1112, E-ISSN 1095-8649, Vol. 77, no 1, p. 308-309Article, book review (Other academic)
  • 11.
    Ahnesjö, Ingrid
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Braga Goncalves, Ines
    Mate Choice in Males and Females2017In: Reference Module in Life Sciences, Elsevier, 2017, p. 394-398Chapter in book (Other academic)
    Abstract [en]

    To find a “dream mate” is important for fitness in all sexually reproducing animals because half of the genome of one’s offspring comes from the chosen mate. Individuals that choose their mates may gain both direct benefits (ie, care or other resources) and indirect benefits (genes improving offspring viability or attractiveness). Mate choice occurs in males and females, and individuals may simultaneously be choosy and compete to be chosen. Processes that often result in sexual selection and in the evolution of secondary sexual characters. Mate choice is context-dependent, operates on multiple traits and varies in time and space.

  • 12.
    Ahnesjö, Ingrid
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Forsgren, Elisabet
    Kvarnemo, Charlotta
    Variation in sexual selection in fishes2008In: Fish Behaviour / [ed] Carin Magnhagen, Victoria A. Braithwaite, Elisabet Forsgren, B.G. Kapoor, Enfield: Science Publishers Inc., 2008, p. 303-335Chapter in book (Refereed)
  • 13. Alatalo, R. V.
    et al.
    Eriksson, D.
    Gustafsson, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Larsson, K.
    EXPLOITATION COMPETITION INFLUENCES THE USE OF FORAGING SITES BY TITS - EXPERIMENTAL-EVIDENCE1987In: Ecology, Vol. 68, no 2, p. 284-290Article in journal (Refereed)
  • 14. Alatalo, R. V.
    et al.
    Eriksson, D.
    Gustafsson, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Larsson, K.
    Exploitation competition influences the use of foraging sites by tits: experimental evidence.1987In: Ecology, Vol. 68, no 2, p. 284-290Article in journal (Refereed)
  • 15. Alatalo, R. V.
    et al.
    Eriksson, D.
    Gustafsson, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Lundberg, A.
    HYBRIDIZATION BETWEEN PIED AND COLLARED FLYCATCHERS - SEXUAL SELECTION AND SPECIATION THEORY1990In: Journal of Evolutionary Biology, Vol. 3, no 5-6, p. 375-389Article in journal (Refereed)
  • 16. Alatalo, R. V.
    et al.
    Gustafsson, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    GENETIC COMPONENT OF MORPHOLOGICAL-DIFFERENTIATION IN COAL TITS UNDER COMPETITIVE RELEASE1988In: Evolution, Vol. 42, no 1, p. 200-203Article in journal (Refereed)
  • 17. Alatalo, R. V.
    et al.
    Gustafsson, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Linden, M.
    Lundberg, A.
    INTERSPECIFIC COMPETITION AND NICHE SHIFTS IN TITS AND THE GOLDCREST - AN EXPERIMENT1985In: Journal of Animal Ecology, Vol. 54, no 3, p. 977-984Article in journal (Refereed)
  • 18. Alatalo, R. V.
    et al.
    Gustafsson, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Linden, M.
    Lundberg, A.
    Interspecific competition and niche shifts in tits and the goldcrest: an experiment.1985In: Journal of Animal Ecology, Vol. 54, no 3, p. 977-984Article in journal (Refereed)
  • 19. Alatalo, R. V.
    et al.
    Gustafsson, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Lundberg, A.
    Breeding success and hybridization of collared flycatcher Ficedula albicollis, and pied flycatcher, Ficedula hypoleuca on Oland 19811982In: Calidris, Vol. 11, no 2, p. 103-108Article in journal (Refereed)
  • 20. Alatalo, R. V.
    et al.
    Gustafsson, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Lundberg, A.
    ( Breeding success and hybridization of collared flycatcher, Ficedula albicollis, and pied flycatcher, Ficedula hypoleuca, on Oland 1981). | Hackningsframgang och forekomst av halsbandsflugsnappare Ficedula albicollis, svartvit flugsnappare Ficedula hypoleuca samt blandpar pa Oland 1981.1982In: Calidris, Vol. 2, no 82, p. 103-108Article in journal (Refereed)
  • 21. Alatalo, R. V.
    et al.
    Gustafsson, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Lundberg, A.
    DO FEMALES PREFER OLDER MALES IN POLYGYNOUS BIRD SPECIES1986In: American Naturalist, Vol. 127, no 2, p. 241-245Article in journal (Refereed)
  • 22. Alatalo, R. V.
    et al.
    Gustafsson, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Lundberg, A.
    EXTRA-PAIR PATERNITY AND HERITABILITY ESTIMATES OF TARSUS LENGTH IN PIED AND COLLARED FLYCATCHERS1989In: Oikos, Vol. 56, no 1, p. 54-58Article in journal (Refereed)
  • 23. Alatalo, R. V.
    et al.
    Gustafsson, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Lundberg, A.
    Extra-pair paternity and heritability estimates of tarsus length in pied and collared flycatchers1989In: Oikos, Vol. 56, no 1, p. 54-58Article in journal (Refereed)
  • 24. Alatalo, R. V.
    et al.
    Gustafsson, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Lundberg, A.
    High frequency of cuckoldry in pied and collared flycatchers.1984In: Oikos, Vol. 42, no 1, p. 41-47Article in journal (Refereed)
  • 25. Alatalo, R. V.
    et al.
    Gustafsson, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Lundberg, A.
    Hybridization and breeding success of collared and pied flycatchers on the island of Gotland.1982In: Auk, Vol. 99, no 2, p. 285-291Article in journal (Refereed)
  • 26. Alatalo, R. V.
    et al.
    Gustafsson, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Lundberg, A.
    HYBRIDIZATION AND BREEDING SUCCESS OF COLLARED AND PIED FLYCATCHERS ON THE ISLAND OF GOTLAND1982In: Auk, Vol. 99, no 2, p. 285-291Article in journal (Refereed)
  • 27. Alatalo, R. V.
    et al.
    Gustafsson, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Lundberg, A.
    Interspecific competition and niche changes in tits ( Parus spp.): evaluation of nonexperimental data.1986In: American Naturalist, Vol. 127, no 6, p. 819-834Article in journal (Refereed)
  • 28. Alatalo, R. V.
    et al.
    Gustafsson, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Lundberg, A.
    INTERSPECIFIC COMPETITION AND NICHE CHANGES IN TITS (PARUS SPP) - EVALUATION OF NONEXPERIMENTAL DATA1986In: American Naturalist, Vol. 127, no 6, p. 819-834Article in journal (Refereed)
  • 29. Alatalo, R. V.
    et al.
    Gustafsson, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Lundberg, A.
    MALE COLORATION AND SPECIES RECOGNITION IN SYMPATRIC FLYCATCHERS1994In: Proceedings of the Royal Society B-Biological Sciences, Vol. 256, no 1346, p. 113-118Article in journal (Refereed)
  • 30. Alatalo, R. V.
    et al.
    Gustafsson, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Lundberg, A.
    PHENOTYPIC SELECTION ON HERITABLE SIZE TRAITS - ENVIRONMENTAL VARIANCE AND GENETIC RESPONSE1990In: American Naturalist, Vol. 135, no 3, p. 464-471Article in journal (Refereed)
  • 31. Alatalo, R. V.
    et al.
    Gustafsson, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Lundberg, A.
    WHY DO YOUNG PASSERINE BIRDS HAVE SHORTER WINGS THAN OLDER BIRDS1984In: Ibis, Vol. 126, no 3, p. 410-415Article in journal (Refereed)
  • 32. Alatalo, R. V.
    et al.
    Gustafsson, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Lundberg, A.
    Ulfstrand, S.
    HABITAT SHIFT OF THE WILLOW TIT PARUS MONTANUS IN THE ABSENCE OF THE MARSH TIT PARUS PALUSTRIS1985In: Ornis Scandinavica, Vol. 16, no 2, p. 121-128Article in journal (Refereed)
  • 33. Alatalo, R. V.
    et al.
    Gustafsson, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Lundberg, A.
    Ulfstrand, S.
    Habitat shift of the willow tit Parus montanus in the absence of the marsh tit Parus palustris.1985In: Ornis Scandinavica, Vol. 16, no 2, p. 121-128Article in journal (Refereed)
  • 34.
    Alavioon, Ghazal
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Evolutionary Biology.
    Hotzy, Cosima
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Evolutionary Biology.
    Nakhro, Khriezhanuo
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Evolutionary Biology.
    Rudolf, Sandra
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Evolutionary Biology.
    Scofield, Douglas
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Evolutionary Biology.
    Zajitschek, Susanne
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Evolutionary Biology. Spanish Natl Res Council, Donana Biol Stn, Seville 41092, Spain.
    Maklakov, Alex A
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology. Univ East Anglia, Sch Biol Sci, Norwich NR4 7TJ, Norfolk, England.
    Immler, Simone
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Evolutionary Biology. Univ East Anglia, Sch Biol Sci, Norwich NR4 7TJ, Norfolk, England.
    Haploid selection within a single ejaculate increases offspring fitness2017In: Proceedings of the National Academy of Sciences of the United States of America, ISSN 0027-8424, E-ISSN 1091-6490, no 30, p. 8053-8058Article in journal (Refereed)
    Abstract [en]

    An inescapable consequence of sex in eukaryotes is the evolution of a biphasic life cycle with alternating diploid and haploid phases. The occurrence of selection during the haploid phase can have far-reaching consequences for fundamental evolutionary processes including the rate of adaptation, the extent of inbreeding depression, and the load of deleterious mutations, as well as for applied research into fertilization technology. Although haploid selection is well established in plants, current dogma assumes that in animals, intact fertile sperm within a single ejaculate are equivalent at siring viable offspring. Using the zebrafish Danio rerio, we show that selection on phenotypic variation among intact fertile sperm within an ejaculate affects offspring fitness. Longer-lived sperm sired embryos with increased survival and a reduced number of apoptotic cells, and adult male offspring exhibited higher fitness. The effect on embryo viability was carried over into the second generation without further selection and was equally strong in both sexes. Sperm pools selected by motile phenotypes differed genetically at numerous sites throughout the genome. Our findings clearly link within-ejaculate variation in sperm phenotype to offspring fitness and sperm genotype in a vertebrate and have major implications for adaptive evolution.

  • 35. Alström, Per
    et al.
    Jonsson, Knud A
    Jon, Fjeldså
    Ödeen, Anders
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Ericson, Per G. P.
    Irestedt, Martin
    Dramatic niche shifts and morphological change in two insular bird species2015In: Royal Society Open Science, E-ISSN 2054-5703, Vol. 2, no 3, article id 140364Article in journal (Refereed)
    Abstract [en]

    Colonizations of islands are often associated with rapid morphological divergence. We present two previously unrecognized cases of dramatic morphological change and niche shifts in connection with colonization of tropical forest-covered islands. These evolutionary changes have concealed the fact that the passerine birds madanga, Madanga ruficollis, from Buru, Indonesia, and São Tomé shorttail, Amaurocichla bocagii, from São Tomé, Gulf of Guinea, are forest-adapted members of the family Motacillidae (pipits and wagtails). We show that Madanga has diverged mainly in plumage, which may be the result of selection for improved camouflage in its new arboreal niche, while selection pressures for other morphological changes have probably been weak owing to preadaptations for the novel niche. By contrast, we suggest thatAmaurocichla's niche change has led to divergence in both structure and plumage.

  • 36.
    Alström, Per
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology. Chinese Acad Sci, Inst Zool, Key Lab Zool Systemat & Evolut, Beijing 100101, Peoples R China.; Swedish Univ Agr Sci, Swedish Species Informat Ctr, Box 7007, S-75007 Uppsala, Sweden.
    Rasmussen, Pamela C
    Michigan State Univ, Dept Integrat Biol, E Lansing, MI 48864 USA.; Michigan State Univ, MSU Museum, E Lansing, MI 48864 USA.; Nat Hist Museum Tring, Bird Grp, Akeman St, Tring HP23 6AP, England.
    Zhao, Chao
    Cloud Mt Conservat, Dali 671003, Peoples R China.
    Xu, Jingzi
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Evolutionary Biology.
    Dalvi, Shashank
    GKVK, Natl Ctr Biol Sci, Researchers Wildlife Conservat, F-21,Bellary Rd, Bengaluru 560065, Karnataka, India.
    Cai, Tianlong
    Chinese Acad Sci, Inst Zool, Key Lab Zool Systemat & Evolut, Beijing 100101, Peoples R China.; Univ Chinese Acad Sci, Coll Life Sci, Beijing 100049, Peoples R China.
    Guan, Yuyan
    Univ Chinese Acad Sci, Coll Life Sci, Beijing 100049, Peoples R China.; Univ Chinese Acad Sci, Coll Life Sci, Beijing 100049, Peoples R China.
    Zhang, Ruiying
    Chinese Acad Sci, Inst Zool, Key Lab Zool Systemat & Evolut, Beijing 100101, Peoples R China.
    Kalyakin, Mikhail V.
    Lomonosov Moscow State Univ, Zool Museum, Bolshaya Nikitskaya Str 2, Moscow 125009, Russia.
    Lei, Fumin
    Chinese Acad Sci, Inst Zool, Key Lab Zool Systemat & Evolut, Beijing 100101, Peoples R China.
    Olsson, Urban
    Univ Gothenburg, Dept Biol & Environm Sci, Systemat & Biodivers, Box 463, S-40530 Gothenburg, Sweden.
    Integrative taxonomy of the Plain-backed Thrush (Zoothera mollissima) complex (Aves, Turdidae) reveals cryptic species, including a new species2016In: Avian Research, ISSN 0005-2175, E-ISSN 2053-7166, Vol. 7, article id 1Article in journal (Refereed)
    Abstract [en]

    Background: The Plain-backed Thrush Zoothera mollissima breeds in the Himalayas and mountains of central China. It was long considered conspecific with the Long-tailed Thrush Zoothera dixoni, until these were shown to be broadly sympatric.

    Methods: We revise the Z. mollissimaZ. dixoni complex by integrating morphological, acoustic, genetic (two mitochondrial and two nuclear markers), ecological and distributional datasets.

    Results: In earlier field observations, we noted two very different song types of “Plain-backed” Thrush segregated by breeding habitat and elevation. Further integrative analyses congruently identify three groups: an alpine breeder in the Himalayas and Sichuan, China (“Alpine Thrush”); a forest breeder in the eastern Himalayas and northwest Yunnan (at least), China (“Himalayan Forest Thrush”); and a forest breeder in central Sichuan (“Sichuan Forest Thrush”). Alpine and Himalayan Forest Thrushes are broadly sympatric, but segregated by habitat and altitude, and the same is probably true also for Alpine and Sichuan Forest Thrushes. These three groups differ markedly in morphology and songs. In addition, DNA sequence data from three non-breeding specimens from Yunnan indicate that yet another lineage exists (“Yunnan Thrush”). However, we find no consistent morphological differences from Alpine Thrush, and its breeding range is unknown. Molecular phylogenetic analyses suggest that all four groups diverged at least a few million years ago, and identify Alpine Thrush and the putative “Yunnan Thrush” as sisters, and the two forest taxa as sisters. Cytochrome b divergences among the four Z. mollissima sensu lato (s.l.) clades are similar to those between any of them and Z. dixoni, and exceed that between the two congeneric outgroup species. We lectotypify the name Oreocincla rostrata Hodgson, 1845 with the Z. mollissima sensu stricto (s.s.) specimen long considered its type. No available name unambiguously pertains to the Himalayan Forest Thrush.

    Conclusions: The Plain-backed Thrush Z. mollissima s.l. comprises at least three species: Alpine Thrush Z. mollissima s.s., with a widespread alpine breeding distribution; Sichuan Forest Thrush Z. griseiceps, breeding in central Sichuan forests; and Himalayan Forest Thrush, breeding in the eastern Himalayas and northwest Yunnan (at least), which is described herein as a new species. “Yunnan Thrush” requires further study.

  • 37.
    Alström, Per
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology. Swedish Univ Agr Sci SLU, Swedish Species Informat Ctr, Box 7007, SE-75007 Uppsala, Sweden;Chinese Acad Sci, Inst Zool, Key Lab Zool Systemat & Evolut, Beijing 100101, Peoples R China.
    Rheindt, Frank E.
    Natl Univ Singapore, Dept Biol Sci, 16 Sci Dr 4, Singapore 117558, Singapore.
    Zhang, Ruiying
    Chinese Acad Sci, Inst Zool, Key Lab Zool Systemat & Evolut, Beijing 100101, Peoples R China.
    Zhao, Min
    Chinese Acad Sci, Inst Zool, Key Lab Zool Systemat & Evolut, Beijing 100101, Peoples R China.
    Wang, Jing
    Chinese Acad Sci, Inst Zool, Key Lab Zool Systemat & Evolut, Beijing 100101, Peoples R China.
    Zhu, Xiaojia
    Chinese Acad Sci, Inst Zool, Key Lab Zool Systemat & Evolut, Beijing 100101, Peoples R China.
    Gwee, Chyi Yin
    Natl Univ Singapore, Dept Biol Sci, 16 Sci Dr 4, Singapore 117558, Singapore.
    Hao, Yan
    Chinese Acad Sci, Inst Zool, Key Lab Zool Systemat & Evolut, Beijing 100101, Peoples R China.
    Ohlson, Jan
    Swedish Museum Nat Hist, Dept Bioinformat & Genet, Box 50007, SE-10405 Stockholm, Sweden.
    Jia, Chenxi
    Chinese Acad Sci, Inst Zool, Key Lab Zool Systemat & Evolut, Beijing 100101, Peoples R China.
    Prawiradilaga, Dewi M.
    Indonesian Inst Sci LIPI, Cibinong Sci Ctr, Res Ctr Biol, Jalan Raya Jakarta Bogor KM 46, Bogor 16911, Indonesia.
    Ericson, Per G. P.
    Swedish Museum Nat Hist, Dept Bioinformat & Genet, Box 50007, SE-10405 Stockholm, Sweden.
    Lei, Fumin
    Chinese Acad Sci, Inst Zool, Key Lab Zool Systemat & Evolut, Beijing 100101, Peoples R China.
    Olsson, Urban
    Univ Gothenburg, Dept Biol & Environm Sci, Box 463, SE-40530 Gothenburg, Sweden.
    Complete species-level phylogeny of the leaf warbler (Aves: Phylloscopidae) radiation2018In: Molecular Phylogenetics and Evolution, ISSN 1055-7903, E-ISSN 1095-9513, Vol. 126, p. 141-152Article in journal (Refereed)
    Abstract [en]

    The leaf warbler radiation (Aves: Phylloscopidae) has undergone a c. 50% increase in the number of recognised species over the last three decades, mainly as a result of analyses of vocalisations and DNA. Using a multilocus dataset for all of the species in this family, and multispecies coalescent-based as well as concatenation methods, we provide the first complete species-level phylogeny for this important group, as well as an estimate of the timing of diversification. The most recent common ancestor for the family was dated at 11.7 million years ago (mya) (95% highest posterior density 9.8-13.7 mya), and divergence times between sister species ranged from 0.5 mya (0.3-0.8 mya) to 6.1 mya (4.8-7.5 mya). Based on our results, we support synonymising Seicercus with Phylloscopus, which results in a monogeneric Phylloscopidae. We discuss the pros and cons of this treatment, and we argue against proliferation of taxonomic names, and conclude that a large monogeneric Phylloscopidae leads to the fewest taxonomic changes compared to traditional classifications. We briefly discuss morphological evolution in the light of the phylogeny. The time calibrated phylogeny is a major improvement compared to previous studies based on a smaller number of species and loci and can provide a basis for future studies of other aspects of phylloscopid evolution.

  • 38.
    Amcoff, Mirjam
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Fishing for Females: Sensory Exploitation in the Swordtail Characin2013Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Mate choice plays an important role in sexual selection and speciation. The evolution of mate choice is intriguing in cases where choosy individuals gain little except for genetic material from the mate and where the trait used as a criterion for the choice is costly to its bearer. The sensory exploitation hypothesis is an interesting idea that applies to such cases because it suggests that sexual preferences may arise as side-effects of preferences that are under selection in other contexts. The role of mate choice in speciation is strong but is debated because the reasons for population divergence in mate preferences and sexual traits are sometimes hard to explain. Also in this context sensory exploitation offers a potential explanation in that a link between natural and sexual selection may result in divergence in sexual selection whenever populations differ in natural selection.

    In this thesis, I test several aspects of this hypothesis in a species of fish, the swordtail characin (Corynopoma riisei). In this species males display a flag-like ornament that grows from the operculum. Because females respond to this ornament by biting at it, it has been proposed to act as a food-mimic. By manipulating female food type and quantity, and testing the resulting female preference for the male ornament, I find support for the theory that the preference has evolved through sensory exploitation and that females indeed appear to relate the ornament to a food item. Furthermore, I show that sensory exploitation can lead to morphological divergence among natural populations in this species. Apart from the flag-ornament, other courtship signals are also investigated. The results show that the relative importance of different signals may vary depending on receiver motivation. This suggests that various aspects of both male courtship signals and the conditions during which they are being signalled should be considered to gain a full understanding of mate choice and its role in sexual selection and speciation.

    List of papers
    1. Does female feeding motivation affect the response to a food-mimicking male ornament in the swordtail characin Corynopoma riisei?
    Open this publication in new window or tab >>Does female feeding motivation affect the response to a food-mimicking male ornament in the swordtail characin Corynopoma riisei?
    2013 (English)In: Journal of Fish Biology, ISSN 0022-1112, E-ISSN 1095-8649, Vol. 83, no 2, p. 343-354Article in journal (Refereed) Published
    Abstract [en]

    Female response to various aspects of male trait morphology and the effect of female feeding motivation were investigated in the swordtail characin Corynopoma riisei, a species where males are equipped with a flag-like food-mimicking ornament that grows from the operculum. Unfed females responded more strongly to the male ornament and showed a stronger preference for larger ornaments than did fed females. Females were shown not to discriminate between artificial male ornaments of either undamaged or damaged shape.

    Keywords
    diet, mate preference, plasticity, sensory exploitation, signalling
    National Category
    Natural Sciences
    Identifiers
    urn:nbn:se:uu:diva-206572 (URN)10.1111/jfb.12175 (DOI)000322547900007 ()
    Available from: 2013-09-02 Created: 2013-09-02 Last updated: 2017-12-06Bibliographically approved
    2. Sensory exploitation and plasticity in female mate choice in the swordtail characin
    Open this publication in new window or tab >>Sensory exploitation and plasticity in female mate choice in the swordtail characin
    2013 (English)In: Animal Behaviour, ISSN 0003-3472, E-ISSN 1095-8282, Vol. 85, no 5, p. 891-898Article in journal (Refereed) Published
    Abstract [en]

    Despite extensive research in the field of sexual selection, the evolutionary origin and maintenance of preferences for sexual ornaments are still debated. Recent studies have pointed out that plasticity in mate choice might be more common than previously thought, but little is still known about the factors that affect such plasticity. The swordtail characin, Corynopoma riisei, is a tropical fish species in which males use a food-mimicking ornament to attract females. We tested whether ecological factors, more specifically prior foraging experience, can affect female preference for male ornaments. For this, we habituated females on a diet consisting of either red-coloured food or standard-coloured green food items and then we tested whether female preferences for artificially red-coloured male ornaments matched their previous foraging experience. We found a strong effect of food treatment: females trained on red food showed a stronger response to males with red-coloured ornaments than females trained on green food. Our results show that ecological variation can generate divergence of female preferences for male ornaments and that the response in preference to environmental change can be rapid if the bias is partly learnt.

    Keywords
    Corynopoma riisei, diet, mate choice, sensory exploitation, sexual selection, swordtail characin
    National Category
    Natural Sciences
    Identifiers
    urn:nbn:se:uu:diva-203305 (URN)10.1016/j.anbehav.2013.02.001 (DOI)000319332000004 ()
    Available from: 2013-07-08 Created: 2013-07-08 Last updated: 2017-12-06Bibliographically approved
    3. Diversification of a Food-Mimicking Male Ornament via Sensory Drive
    Open this publication in new window or tab >>Diversification of a Food-Mimicking Male Ornament via Sensory Drive
    2012 (English)In: Current Biology, ISSN 0960-9822, E-ISSN 1879-0445, Vol. 22, no 15, p. 1440-1443Article in journal (Refereed) Published
    Abstract [en]

    The evolutionary divergence of sexual signals is often important during the formation of new animal species, but our understanding of the origin of signal diversity is limited [1, 2]. Sensory drive, the optimization of communication signal efficiency through matching to the local environment, has been highlighted as a potential promoter of diversification and speciation [3]. The swordtail characin (Corynopoma riisei) is a tropical fish in which males display a flag-like ornament that elicits female foraging behavior during courtship. We show that the shape of the male ornament covaries with female diet across natural populations. More specifically, natural populations in which the female diet is more dominated by ants exhibit male ornaments more similar to the shape of an ant. Feeding experiments confirm that females habituated to a diet of ants prefer to bite at male ornaments from populations with a diet more dominated by ants. Our results show that the male ornament functions as a "fishing lure" that is diversifying in shape to match local variation in female search images employed during foraging. This direct link between variation in female feeding ecology and the evolutionary diversification of male sexual ornaments suggests that sensory drive may be a common engine of signal divergence.

    National Category
    Biological Sciences
    Identifiers
    urn:nbn:se:uu:diva-181121 (URN)10.1016/j.cub.2012.05.050 (DOI)000307415000026 ()
    Available from: 2012-09-19 Created: 2012-09-17 Last updated: 2017-12-07Bibliographically approved
    4. Courtship signalling with a labile bilateral signal: males show their best side
    Open this publication in new window or tab >>Courtship signalling with a labile bilateral signal: males show their best side
    2009 (English)In: Behavioral Ecology and Sociobiology, ISSN 0340-5443, E-ISSN 1432-0762, Vol. 63, no 12, p. 1717-1725Article in journal (Refereed) Published
    Abstract [en]

    Asymmetries in courtship signals can result from both developmental instability during ontogeny and from temporary or permanent damage following mating, fighting, or interactions with predators. These two types of asymmetries, which can be divided into fluctuating asymmetry (FA) and damage asymmetry (DA), have both been suggested to play an important role in mate choice as potential honest indicators of phenotypic and/or genetic quality, while at the same time, DA may affect ornament asymmetry in a random manner. Interestingly, despite the massive research effort that has been devoted to the study of asymmetry during the past decades, very little is known about how an individual's behaviour relates to asymmetry. Here, we measure and characterise asymmetry in morphological courtship signals in Corynopoma riisei, a fish where males carry elaborate paddle-like appendices on each side of the body that they display in front of females during courtship. Moreover, we investigate whether male courtship display, employing this bilateral morphological trait, reflects trait asymmetry. Finally, we assess whether males respond to phenotypic manipulations of DA with corresponding changes in courtship behaviour. We show that male display behaviour is asymmetric in a manner that reflects asymmetry of their morphological courtship trait and that male display behaviour responds to manipulations of asymmetry of these paddles. Our results thus suggest that males preferentially use their best side and, hence, that males respond adaptively to temporary changes in signal trait asymmetry.

    Keywords
    Sexual signalling, Sexual selection, Lateralization, Mate choice, Sensory bias, Indicator, Self-awareness
    National Category
    Biological Sciences
    Identifiers
    urn:nbn:se:uu:diva-127482 (URN)10.1007/s00265-009-0785-7 (DOI)000270684200003 ()
    Available from: 2010-07-15 Created: 2010-07-13 Last updated: 2017-12-12Bibliographically approved
    5. Multiple male sexual signals and female responsiveness in the swordtail characin, Corynopoma riisei
    Open this publication in new window or tab >>Multiple male sexual signals and female responsiveness in the swordtail characin, Corynopoma riisei
    2015 (English)In: Environmental Biology of Fishes, ISSN 0378-1909, E-ISSN 1573-5133, Vol. 98, no 7, p. 1731-1740Article in journal (Refereed) Published
    Abstract [en]

    In the courtship process, multiple signals are often used between the signaller and the receiver. Here we describe female response to multiple male visual morphological and behavioural signals in the swordtail characin, Corynopoma riisei. The swordtail characin is a species in which males display several morphological ornaments as well as a rich courtship repertoire. Our results show that high courtship intensity was associated with an increased female response towards the male ornament, increased number of mating attempts and a reduction in female aggression. The morphological aspects investigated here did not seem to correlate with female response. This may indicate that, when both behaviour and morphology are considered simultaneously, courtship behaviour may have priority over morphological cues in this species.

    Keywords
    courtship, multiple signalling, visual cues, morphology, mate choice
    National Category
    Evolutionary Biology
    Research subject
    Biology with specialization in Animal Ecology
    Identifiers
    urn:nbn:se:uu:diva-207333 (URN)10.1007/s10641-015-0388-2 (DOI)000355620700001 ()
    Available from: 2013-09-12 Created: 2013-09-12 Last updated: 2017-12-06Bibliographically approved
  • 39.
    Amcoff, Mirjam
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Evolution. Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Arnqvist, Göran
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Evolution. Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Kolm, Niclas
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Evolution. Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Courtship signalling with a labile bilateral signal: males show their best side2009In: Behavioral Ecology and Sociobiology, ISSN 0340-5443, E-ISSN 1432-0762, Vol. 63, no 12, p. 1717-1725Article in journal (Refereed)
    Abstract [en]

    Asymmetries in courtship signals can result from both developmental instability during ontogeny and from temporary or permanent damage following mating, fighting, or interactions with predators. These two types of asymmetries, which can be divided into fluctuating asymmetry (FA) and damage asymmetry (DA), have both been suggested to play an important role in mate choice as potential honest indicators of phenotypic and/or genetic quality, while at the same time, DA may affect ornament asymmetry in a random manner. Interestingly, despite the massive research effort that has been devoted to the study of asymmetry during the past decades, very little is known about how an individual's behaviour relates to asymmetry. Here, we measure and characterise asymmetry in morphological courtship signals in Corynopoma riisei, a fish where males carry elaborate paddle-like appendices on each side of the body that they display in front of females during courtship. Moreover, we investigate whether male courtship display, employing this bilateral morphological trait, reflects trait asymmetry. Finally, we assess whether males respond to phenotypic manipulations of DA with corresponding changes in courtship behaviour. We show that male display behaviour is asymmetric in a manner that reflects asymmetry of their morphological courtship trait and that male display behaviour responds to manipulations of asymmetry of these paddles. Our results thus suggest that males preferentially use their best side and, hence, that males respond adaptively to temporary changes in signal trait asymmetry.

  • 40.
    Amcoff, Mirjam
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Gonzalez-Voyer, A.
    Kolm, Niclas
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Evolution of egg dummies in Tanganyikan cichlid fishes: the roles of parental care and sexual selection2013In: Journal of Evolutionary Biology, ISSN 1010-061X, E-ISSN 1420-9101, Vol. 26, no 11, p. 2369-2382Article, review/survey (Refereed)
    Abstract [en]

    Sexual selection has been suggested to be an important driver of speciation in cichlid fishes of the Great Lakes of Africa, and the presence of male egg dummies is proposed to have played a key role. Here, we investigate how mouthbrooding and egg dummies have evolved in Tanganyikan cichlids, the lineage which seeded the other African radiations, with a special emphasis on the egg dummies. Using modern phylogenetic comparative analyses and a phylogeny including 86% of the 200 described species, we provide formal evidence demonstrating correlated evolution between mouthbrooding and egg dummies in Tanganyikan cichlids. These results concur with existing evidence, suggesting that egg dummies have evolved through sensory exploitation. We also demonstrate that there is a strong evolutionary correlation between the presence of egg dummies and both pre- and post-copulatory sexual selection. Moreover, egg dummy evolution was contingent on the intensity of pre- and post-copulatory sexual selection in Tanganyikan cichlids. In sum, our results provide evidence supporting the hypothesis of egg dummies evolving through sensory exploitation and highlight the role of sexual selection in favouring the evolution and maintenance of this trait.

  • 41.
    Amcoff, Mirjam
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Hallsson, Lara R.
    Winberg, Svante
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Physiology.
    Kolm, Niclas
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Male Courtship Pheromones Affect Female Behaviour in the Swordtail Characin ( Corynopoma riisei)2014In: Ethology, ISSN 0179-1613, E-ISSN 1439-0310, Vol. 120, no 5, p. 463-470Article in journal (Refereed)
    Abstract [en]

    Pheromones constitute an important cue used by both males and females during courtship. Here, we investigate the effect of male pheromones on female behaviour in the swordtail characin (Corynopoma riisei), a species of fish where males have a caudal pheromone gland which has been suggested to affect female behaviour during courtship. We subjected female C.riisei to male courtship pheromones and investigated the effect on both female behaviour and brain serotonergic activity levels compared to a control group. While no difference in serotonergic activity was found, the pheromone-treated females showed lower stress levels compared to the control group. Furthermore, pheromone-treated females increased locomotor activity over time, while a decrease in locomotor activity was observed in the control group. These results suggest that the male courtship pheromones may serve to reduce female stress and increase female activity, possibly to aid males in gaining access to females and facilitating sperm transfer.

  • 42.
    Amcoff, Mirjam
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Kolm, Niclas
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    A test of sensory exploitation in the swordtail characin (Corynopoma riisei) based on colour matchingbetween female prey and a male ornament2014In: Environmental Biology of Fishes, ISSN 0378-1909, E-ISSN 1573-5133, Vol. 97, no 3, p. 247-254Article in journal (Refereed)
    Abstract [en]

    The sensory exploitation hypothesis states that pre-existing biases in female sensory systems may generate strong selection on male signals to match such biases. As environmental conditions differ between populations, sexual preferences resulting from natural selection are expected to vary as well. The swordtail characin (Corynopoma riisei) is a species in which males carry a flag-like ornament growing from the operculum that has been proposed to function as a prey mimic to attract females. Here, we investigated if female plasticity in feeding preferences is associated with plasticity in preference for an artificial male ornament in this species. Females were trained for 10 days by offering them differently coloured food items and were then tested for changes in preferences for differently coloured artificial male ornaments according to foraging experience. We found a rapid and pronounced change in female preference for the colouration of the artificial ornament according to food training. Thus our results support the possibility that sensory exploitation may act as a driving force for female preferences for male ornaments in this species.

  • 43.
    Amcoff, Mirjam
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Kolm, Niclas
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Does female feeding motivation affect the response to a food-mimicking male ornament in the swordtail characin Corynopoma riisei?2013In: Journal of Fish Biology, ISSN 0022-1112, E-ISSN 1095-8649, Vol. 83, no 2, p. 343-354Article in journal (Refereed)
    Abstract [en]

    Female response to various aspects of male trait morphology and the effect of female feeding motivation were investigated in the swordtail characin Corynopoma riisei, a species where males are equipped with a flag-like food-mimicking ornament that grows from the operculum. Unfed females responded more strongly to the male ornament and showed a stronger preference for larger ornaments than did fed females. Females were shown not to discriminate between artificial male ornaments of either undamaged or damaged shape.

  • 44.
    Amcoff, Mirjam
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Kolm, Niclas
    Multiple male sexual signals and female responsiveness in the swordtail characin, Corynopoma riisei2015In: Environmental Biology of Fishes, ISSN 0378-1909, E-ISSN 1573-5133, Vol. 98, no 7, p. 1731-1740Article in journal (Refereed)
    Abstract [en]

    In the courtship process, multiple signals are often used between the signaller and the receiver. Here we describe female response to multiple male visual morphological and behavioural signals in the swordtail characin, Corynopoma riisei. The swordtail characin is a species in which males display several morphological ornaments as well as a rich courtship repertoire. Our results show that high courtship intensity was associated with an increased female response towards the male ornament, increased number of mating attempts and a reduction in female aggression. The morphological aspects investigated here did not seem to correlate with female response. This may indicate that, when both behaviour and morphology are considered simultaneously, courtship behaviour may have priority over morphological cues in this species.

  • 45.
    Amcoff, Mirjam
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Lindqvist, Charlotte
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Kolm, Niclas
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Sensory exploitation and plasticity in female mate choice in the swordtail characin2013In: Animal Behaviour, ISSN 0003-3472, E-ISSN 1095-8282, Vol. 85, no 5, p. 891-898Article in journal (Refereed)
    Abstract [en]

    Despite extensive research in the field of sexual selection, the evolutionary origin and maintenance of preferences for sexual ornaments are still debated. Recent studies have pointed out that plasticity in mate choice might be more common than previously thought, but little is still known about the factors that affect such plasticity. The swordtail characin, Corynopoma riisei, is a tropical fish species in which males use a food-mimicking ornament to attract females. We tested whether ecological factors, more specifically prior foraging experience, can affect female preference for male ornaments. For this, we habituated females on a diet consisting of either red-coloured food or standard-coloured green food items and then we tested whether female preferences for artificially red-coloured male ornaments matched their previous foraging experience. We found a strong effect of food treatment: females trained on red food showed a stronger response to males with red-coloured ornaments than females trained on green food. Our results show that ecological variation can generate divergence of female preferences for male ornaments and that the response in preference to environmental change can be rapid if the bias is partly learnt.

  • 46.
    Andersson, Anastasia
    et al.
    Stockholm Univ, Dept Zool, Div Populat Genet, Stockholm, Sweden..
    Johansson, Frank
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Sundbom, Marcus
    Stockholm Univ, Dept Environm Sci & Analyt Chem, Stockholm, Sweden..
    Ryman, Nils
    Stockholm Univ, Dept Zool, Div Populat Genet, Stockholm, Sweden..
    Laikre, Linda
    Stockholm Univ, Dept Zool, Div Populat Genet, Stockholm, Sweden..
    Lack of trophic polymorphism despite substantial genetic differentiation in sympatric brown trout (Salmo trutta) populations2017In: Ecology of Freshwater Fish, ISSN 0906-6691, E-ISSN 1600-0633, Vol. 26, no 4, p. 643-652Article in journal (Refereed)
    Abstract [en]

    Sympatric populations occur in many freshwater fish species; such populations are typically detected through morphological distinctions that are often coupled to food niche and genetic separations. In salmonids, trophic and genetically separate sympatric populations have been reported in landlocked Arctic char, whitefish and brown trout. In Arctic char and brown trout rare cases of sympatric, genetically distinct populations have been detected based on genetic data alone, with no apparent morphological differences, that is cryptic structuring. It remains unknown whether such cryptic, sympatric structuring can be coupled to food niche separation. Here, we perform an extensive screening for trophic divergence of two genetically divergent, seemingly cryptic, sympatric brown trout populations documented to remain in stable sympatry over several decades in two interconnected, tiny mountain lakes in a nature reserve in central Sweden. We investigate body shape, body length, gill raker metrics, breeding status and diet (stomach content analysis and stable isotopes) in these populations. We find small significant differences for body shape, body size and breeding status, and no evidence of food niche separation between these two populations. In contrast, fish in the two lakes differed in body shape, diet, and nitrogen and carbon isotope signatures despite no genetic difference between lakes. These genetically divergent populations apparently coexist using the same food resources and showing the same adaptive plasticity to the local food niches of the two separate lakes. Such observations have not been reported previously but may be more common than recognised as genetic screenings are necessary to detect the structures.

  • 47. Andersson, M. S.
    et al.
    Gustafsson, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    GLYCOSYLATED HEMOGLOBIN - A NEW MEASURE OF CONDITION IN BIRDS1995In: Proceedings of the Royal Society B-Biological Sciences, Vol. 260, no 1359, p. 299-303Article in journal (Refereed)
  • 48. Andres, J A
    et al.
    Arnqvist, Göran
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
    Genetic divergence of the seminal signal-receptor system in houseflies: the footprints of sexually antagonistic coevolution?2001In: Proceedings of the Royal Society of London. Biological Sciences, ISSN 0962-8452, E-ISSN 1471-2954, Vol. 268, no 1465, p. 399-405Article in journal (Refereed)
  • 49.
    Appelgren, A.
    et al.
    Univ Lyon 1, CNRS, Dept Biometry & Evolutionary Biol, Villeurbanne, France.;Univ Bern, Inst Ecol & Evolut, Evolutionary Ecol Lab, Bern, Switzerland.;Ctr IRD, MIVEGEC UMR CNRS IRD UM 5290, Montpellier, France..
    McCoy, K. D.
    Ctr IRD, MIVEGEC UMR CNRS IRD UM 5290, Montpellier, France..
    Richner, H.
    Univ Bern, Inst Ecol & Evolut, Evolutionary Ecol Lab, Bern, Switzerland..
    Doligez, Blandine
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology. Univ Lyon 1, CNRS, Dept Biometry & Evolutionary Biol, Villeurbanne, France.
    Relative fitness of a generalist parasite on two alternative hosts: a cross-infestation experiment to test host specialization of the hen flea Ceratophyllus gallinae (Schrank)2016In: Journal of Evolutionary Biology, ISSN 1010-061X, E-ISSN 1420-9101, Vol. 29, no 5, p. 1091-1101Article in journal (Refereed)
    Abstract [en]

    Host range is a key element of a parasite's ecology and evolution and can vary greatly depending on spatial scale. Generalist parasites frequently show local population structure in relation to alternative sympatric hosts (i.e. host races) and may thus be specialists at local scales. Here, we investigated local population specialization of a common avian nest-based parasite, the hen flea Ceratophyllus gallinae (Schrank), exploiting two abundant host species that share the same breeding sites, the great tit Parus major (Linnaeus) and the collared flycatcher Ficedula albicollis (Temminck). We performed a cross-infestation experiment of fleas between the two host species in two distinct study areas during a single breeding season and recorded the reproductive success of both hosts and parasites. In the following year, hosts were monitored again to assess the long-term impact of cross-infestation. Our results partly support the local specialization hypothesis: in great tit nests, tit fleas caused higher damage to their hosts than flycatcher fleas, and in collared flycatcher nests, flycatcher fleas had a faster larval development rates than tit fleas. However, these results were significant in only one of the two studied areas, suggesting that the location and history of the host population can modulate the specialization process. Caution is therefore called for when interpreting single location studies. More generally, our results emphasize the need to explicitly account for host diversity in order to understand the population ecology and evolutionary trajectory of generalist parasites.

  • 50.
    Appelgren, Anais S. C.
    et al.
    Univ Bern, Inst Ecol & Evolut, Evolutionary Ecol Lab, Baltzerstr 6, Bern, Switzerland;Univ Lyon, CNRS, F-69000 Lyon, France;LBBE UMR 5558, Dept Biometry & Evolutionary Biol, Batiment Gregor Mendel,43 Blvd 11 Novembre 1918, F-69622 Villeurbanne, France;Univ Lyon 1, Dept Biometry & Evolutionary Biol, LBBE UMR 5558, Batiment Gregor Mendel,43 Blvd 11 Novembre 1918, F-69622 Villeurbanne, France;Univ Montpellier, Ctr IRD, Agropolis, MIVEGEC,CNRS,IRD, 911 Ave,BP 64501, F-34000 Montpellier, France.
    Saladin, Verena
    Univ Bern, Inst Ecol & Evolut, Evolutionary Ecol Lab, Baltzerstr 6, Bern, Switzerland.
    Richner, Heinz
    Univ Bern, Inst Ecol & Evolut, Evolutionary Ecol Lab, Baltzerstr 6, Bern, Switzerland.
    Doligez, Blandine
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology. Univ Lyon, CNRS, F-69000 Lyon, France;LBBE UMR 5558, Dept Biometry & Evolutionary Biol, Batiment Gregor Mendel,43 Blvd 11 Novembre 1918, F-69622 Villeurbanne, France;Univ Lyon 1, Dept Biometry & Evolutionary Biol, LBBE UMR 5558, Batiment Gregor Mendel,43 Blvd 11 Novembre 1918, F-69622 Villeurbanne, France.
    McCoy, Karen D.
    Univ Montpellier, Ctr IRD, Agropolis, MIVEGEC,CNRS,IRD, 911 Ave,BP 64501, F-34000 Montpellier, France.
    Gene flow and adaptive potential in a generalist ectoparasite2018In: BMC Evolutionary Biology, ISSN 1471-2148, E-ISSN 1471-2148, Vol. 18, article id 99Article in journal (Refereed)
    Abstract [en]

    Background: In host-parasite systems, relative dispersal rates condition genetic novelty within populations and thus their adaptive potential. Knowledge of host and parasite dispersal rates can therefore help us to understand current interaction patterns in wild populations and why these patterns shift over time and space. For generalist parasites however, estimates of dispersal rates depend on both host range and the considered spatial scale. Here, we assess the relative contribution of these factors by studying the population genetic structure of a common avian ectoparasite, the hen flea Ceratophyllus gallinae, exploiting two hosts that are sympatric in our study population, the great tit Paws major and the collared flycatcher Ficedula albicollis. Previous experimental studies have indicated that the hen flea is both locally maladapted to great tit populations and composed of subpopulations specialized on the two host species, suggesting limited parasite dispersal in space and among hosts, and a potential interaction between these two structuring factors. Results: C gallinae fleas were sampled from old nests of the two passerine species in three replicate wood patches and were genotyped at microsatellite markers to assess population genetic structure at different scales (among individuals within a nest among nests and between host species within a patch and among patches). As expected, significant structure was found at all spatial scales and between host species, supporting the hypothesis of limited dispersal in this parasite. Clustering analyses and estimates of relatedness further suggested that inbreeding regularly occurs within nests. Patterns of isolation by distance within wood patches indicated that flea dispersal likely occurs in a stepwise manner among neighboring nests. From these data, we estimated that gene flow in the hen flea is approximately half that previously described for its great tit hosts. Conclusion: Our results fall in line with predictions based on observed patterns of adaptation in this host-parasite system, suggesting that parasite dispersal is limited and impacts its adaptive potential with respect to its hosts. More generally, this study sheds light on the complex interaction between parasite gene flow, local adaptation and host specialization within a single host-parasite system.

1234567 1 - 50 of 783
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf