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  • 351.
    Victorsson, Jonas
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi.
    Ås, Stefan
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi.
    What is the matrix ? A sea or a habitat for saproxylic Coleoptera in deciduous forest fragments in boreal forestManuskript (Annet vitenskapelig)
    Abstract [en]

    We compared two regions that differed in the level of habitat fragmentation regarding deciduous trees. Brassberget, a less fragmented region, and Gåsberget, a more fragmented region that had a 2 % lower proportion of deciduous forest than Brassberget. We investigated the assemblage of saproxylic Coleoptera in birch in remnant patches of deciduous forest as well as in two matrix forest-types: mature coniferous forest and clear-cuts. We exposed 240 standardized birch bolts (tree bole, 1m in length) to natural colonization in a total of 30 forest sites and then collected Coleoptera emerging from those bolts. The saproxylic Coleoptera assemblages reflected the underlying regional difference in level of fragmentation. In the less fragmented region the Coleoptera assemblages in deciduous remnants and mature coniferous forest were largely similar in species composition, guild proportions, species richness, evenness, and dominance. The clear-cuts in this region differed from the other two forest types in all these community measures. In the more fragmented region there was a different pattern. In that region, the deciduous remnants were different from the matrix forest types, both mature coniferous sites and clear-cuts, in species composition, guild proportions, and evenness whereas the two matrix forest types had largely converged regarding all these community measures. Regional comparisons of forest types, showed that there was forest-type convergence in guild proportions in both deciduous remnants and in clear-cuts but regional divergence in mature coniferous sites. Thus, the effects of increasing habitat fragmentation was primarily found in mature coniferous forest. We conclude that in the less fragmented region, mature matrix forest retain habitat characteristics similar enough to natural deciduous forest to allow a saproxylic Coleoptera fauna similar to the one in deciduous forest-fire remnants to develop.

  • 352.
    Vila, M
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Teknisk-naturvetenskapliga fakulteten, Biologiska sektionen, Institutionen för ekologi och evolution. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Teknisk-naturvetenskapliga fakulteten, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi. Zooekologi.
    Cassel, A
    Thuman, KA
    Björklund, M
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Teknisk-naturvetenskapliga fakulteten, Biologiska sektionen, Institutionen för ekologi och evolution. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Teknisk-naturvetenskapliga fakulteten, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi. Zooekologi.
    A new conservation unit in the butterfly Erebia triaria (Nymphalidae) as revealed by nuclear and mitochondrial markers2006Inngår i: Annales Zoologici Fennici, Vol. 43, s. 72-79Artikkel i tidsskrift (Fagfellevurdert)
  • 353.
    Vila, Marta
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Teknisk-naturvetenskapliga fakulteten, Biologiska sektionen, Institutionen för ekologi och evolution. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Teknisk-naturvetenskapliga fakulteten, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi. Zooekologi.
    Björklund, Mats
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Teknisk-naturvetenskapliga fakulteten, Biologiska sektionen, Institutionen för ekologi och evolution. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Teknisk-naturvetenskapliga fakulteten, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi. Zooekologi.
    Testing biennialism in the butterfly Erebia palarica (Nymphalidae: Satyrinae) by mtDNA sequencing2004Inngår i: Insect molecular biology, Vol. 13, s. 213-217Artikkel i tidsskrift (Annet (populærvitenskap, debatt, mm))
  • 354.
    Vila, Marta
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Teknisk-naturvetenskapliga fakulteten, Biologiska sektionen, Institutionen för ekologi och evolution. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Teknisk-naturvetenskapliga fakulteten, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi. Zooekologi.
    Björklund, Mats
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Teknisk-naturvetenskapliga fakulteten, Biologiska sektionen, Institutionen för ekologi och evolution. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Teknisk-naturvetenskapliga fakulteten, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi. Zooekologi.
    The utility of the neglected mitochondrial control region for evolutionary studies in Lepidoptera (Insecta)2004Inngår i: Journal of molecular evolution, Vol. 58, s. 280-290Artikkel i tidsskrift (Fagfellevurdert)
  • 355.
    Vila, Marta
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Teknisk-naturvetenskapliga fakulteten, Biologiska sektionen, Institutionen för ekologi och evolution. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Teknisk-naturvetenskapliga fakulteten, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi.
    Vidal-Romani, J R
    Björklund, Mats
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Teknisk-naturvetenskapliga fakulteten, Biologiska sektionen, Institutionen för ekologi och evolution. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Teknisk-naturvetenskapliga fakulteten, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi.
    The importance of time scale and multiple refugia: incipient speciation and admixture of lineages in the butterfly Erebia triaria (Nymphalidae)2005Inngår i: Molecular Phylogenetics and Evolution, Vol. 36, s. 249-260Artikkel i tidsskrift (Fagfellevurdert)
  • 356. Vincent, Amanda
    et al.
    Ahnesjö, Ingrid
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi.
    Berglund, Anders
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi.
    Rosenqvist, Gunilla
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi.
    Pipefishes and seahorses: are they all sex-role reversed?1992Inngår i: Trends in Ecology & Evolution, ISSN 0169-5347, E-ISSN 1872-8383, Vol. 7, nr 7, s. 237-241Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The male pregnancy of pipefishes and seahorses has led to the inference that females compete most intensely for access to mates, because males limit female reproduction. However, recent work has shown that in different species either sex may be the predominant competitor for mates. In this family, there is an apparent association between the mating pattern and the sex roles: polygamous species show reversed sex roles whereas monogamous species exhibit 'conventional' sex roles. These studies emphasize that sex role reversal is not synonymous with male parental care.

  • 357. Vincent, Amanda C.J.
    et al.
    Berglund, Anders
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi.
    Ahnesjö, Ingrid
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi.
    Reproductive ecology of five pipefish species in one eelgrass meadow1995Inngår i: Environmental Biology of Fishes, ISSN 0378-1909, E-ISSN 1573-5133, Vol. 44, nr 4, s. 347-361Artikkel i tidsskrift (Annet vitenskapelig)
    Abstract [en]

    Synopsis Pipefishes have rarely been watched in the wild and have never before been followed in their common seagrass habitats. This study explores the reproductive ecology of five species of pipefishes living in a Swedish eelgrass meadow during parts of four breeding seasons, tagging four of the species. Pipefish are remarkable for their specialised paternal care: only males aerate, osmoregulate and nourish the developing embryos. Two of the species (Entelurus aequoreus andNerophis ophidion) have simple ventral gluing of eggs on the trunk while three species (Syngnathus acus, S. rostellatus andS. typhle) have fully enclosed brood pouches on their tails. Males of the former species receive eggs from one female while males of the genusSyngnathus receive partial clutches from several females. Sex ratios of adults on the site differed from equal to male-biased to female-biased, according to species.S. typhle were most numerous and were resighted most often. They were present throughout the breeding season whereas there were temporal shifts in the presence of the other species on the meadow and in some sex ratios. Most species occurred in the deeper, denser part of the meadow but there was some habitat separation by species and sex. All species tended to stay low in the eelgrass, primarily coming up above the eelgrass to display and mate. No species showed site fidelity either to a home range or to the meadow, withE. aequoreus adults spending least time on the meadow. Sexual size dimorphism differed: males were larger inS. rostellatus, the same size inS acus and smaller in the other species. Although the species overlap in habitat requirements and breeding season, the only observed interspecific interactions were abortive courtships betweenSyngnathus species.

  • 358.
    Vinnersten, Thomas Z. Persson
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Populationsbiologi och naturvårdsbiologi.
    Lundström, Jan O.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Populationsbiologi och naturvårdsbiologi.
    Schäfer, Martina L.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Populationsbiologi och naturvårdsbiologi.
    Petersson, Erik
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi.
    Landin, J.
    A six-year study of insect emergence from temporary flooded wetlands in central Sweden, with and without Bti-based mosquito control2010Inngår i: Bulletin of entomological research, ISSN 0007-4853, E-ISSN 1475-2670, Vol. 100, nr 6, s. 715-725Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In temporary wetlands in the River Dalalven floodplains, recurrent but irregular floods induce massive hatching of the flood-water mosquito Aedes sticticus, which causes enormous nuisance. Flood-water mosquito control using the biological larvicide Bacillus thuringiensis var. israelensis (Bti) was commenced in parts of the floodplains during 2002, and here we report the first six years of full-season monitoring of general insect emergence from temporary wetlands with and without treatment. Emergence traps, which were emptied weekly, were used from May to September each year. A total of 137,153 insects of 13 taxonomic orders were collected. Diptera was highly dominating and especially the sub-order Nematocera with 18 families was a very prominent taxon. Bti-treatment effects were analysed by taxonomic order, by sub-order in Diptera and Hemiptera, and by family for Nematocera and Coleoptera for the whole study period. We found no significant negative effects of Bti treatments on the production of insects by taxonomic order, with the exception of Coleoptera in the long term. However, no significant negative effects were found for the Coleoptera families, neither in the short term nor in the long term. There was no significant negative treatment effect on Nematocera production, neither when analyzed for the whole sub-order nor when analyzed by family. However, abundance of Ceratopogonidae was significantly higher in experimental than in reference wetlands. We conclude that Bti-treatment effects on insect production may be minute in comparison to other environmental factors structuring the insect fauna of the temporary wetlands studied.

  • 359.
    Widemo, F
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Teknisk-naturvetenskapliga fakulteten, Biologiska sektionen, Institutionen för ekologi och evolution. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Teknisk-naturvetenskapliga fakulteten, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi.
    Johansson, BG
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Teknisk-naturvetenskapliga fakulteten, Biologiska sektionen, Institutionen för ekologi och evolution. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Teknisk-naturvetenskapliga fakulteten, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi.
    Male-male pheromone signalling in a lekking Drosophila2006Inngår i: Proceedings of the Royal Society Series B, Vol. 273, s. 713-717Artikkel i tidsskrift (Annet (populærvitenskap, debatt, mm))
  • 360.
    Wiley, Chris J.
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och genetik, Zooekologi.
    Fogelberg, N.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och genetik, Zooekologi.
    Saether, Stein Are
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och genetik, Zooekologi.
    Veen, T.
    Svedin, Nina
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi.
    Vogel Kehlenbeck, Jenny
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och genetik, Zooekologi.
    Qvarnström, Anna
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi.
    Direct benefits and costs for hybridising Ficedula flycatchers2007Inngår i: Journal of Evolutionary Biology, ISSN 1010-061X, E-ISSN 1420-9101, Vol. 20, nr 3, s. 854-864Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    It is well understood that females may gain direct benefits from breeding with attractive males. However, the direct fitness effects of mate-choice are rarely considered with respect to mating between different species (hybridization), a field dominated by discussion of indirect costs of producing unfit hybrid offspring. Hybridizing females may also gain by the types of direct benefits that are important for intraspecific mate choice, and in addition may have access to certain benefits that are restricted to mating with males of an ecologically diverged sister-taxon. We investigate possible direct benefits and costs female Ficedula flycatchers gain from breeding with a heterospecific male, and demonstrate that hybridizing female collared flycatchers (F. albicollis) breed in territories that do not suffer the seasonal decline in habitat quality experienced by females breeding with conspecifics. We exclude the hypotheses that heterospecific males provide alternative food-types or assume a greater amount of the parental workload. In fact, the diets of the two species (F. albicollis and F. hypoleuca) were highly similar, suggesting possible interspecific competition over food resources in sympatry. We discuss the implications of direct fitness effects of hybridization, and why there has been such a disparity in the attention paid to such benefits and costs with regard to intraspecific and interspecific mate-choice.

  • 361.
    Wiley, Chris
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi.
    Qvarnström, Anna
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi.
    Andersson, Gunilla
    Borge, Thomas
    Saetre, Glenn-Peter
    POSTZYGOTIC ISOLATION OVER MULTIPLE GENERATIONS OF HYBRID DESCENDENTS IN A NATURAL HYBRID ZONE: HOW WELL DO SINGLE-GENERATION ESTIMATES REFLECT REPRODUCTIVE ISOLATION?2009Inngår i: Evolution, ISSN 0014-3820, E-ISSN 1558-5646, Vol. 63, nr 7, s. 1731-1739Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Understanding speciation depends on an accurate assessment of the reproductive barriers separating newly diverged populations. In several taxonomic groups, prezygotic barriers, especially preferences for conspecific mates, are thought to play the dominant role in speciation. However, the importance of postzygotic barriers (i.e., low fitness of hybrid offspring) may be widely underestimated. In this study, we examined how well the widely used proxy of postzygotic isolation (reproductive output of F1 hybrids) reflects the long-term fitness consequences of hybridization between two closely related species of birds. Using 40 species-specific single nucleotide polymorphism (SNP) markers, we genotyped a mixed population of collared and pied flycatchers (Ficedula albicollis and F. hypoleuca) to identify grand- and great grand-offspring from interspecific crosses to derive an accurate, multigeneration estimate of postzygotic isolation. Two independent estimates of fitness show that hybridization results in 2.4% and 2.7% of the number of descendents typical of conspecific pairing. This postzygotic isolation was considerably stronger than estimates based on F1 hybrids. Our results demonstrate that, in nature, combined selection against hybrids and backcrossed individuals may result in almost complete postzygotic isolation between two comparatively young species. If these findings are general, postzygotic barriers separating hybridizing populations may be much stronger than previously thought.

  • 362. Wiley, Chris
    et al.
    Qvarnström, Anna
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi.
    Gustafsson, Lars
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi.
    Effects of hybridization on the immunity of collared Ficedula albicollis and pied flycatchers F-hypoleuca, and their infection by haemosporidians2009Inngår i: Journal of Avian Biology, ISSN 0908-8857, E-ISSN 1600-048X, Vol. 40, nr 4, s. 352-357Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Because they are ubiquitous and typically reduce the fitness of hosts, parasites may play important roles in hybrid zone dynamics. Despite much work on herbivores and hybrid plants, the effect of parasites on the fitness of animal hybrids is poorly known. In an attempt to partly fill this gap, we examined the prevalence of avian haemosporidians Haemoproteus in a hybrid zone between collared Ficedula albicollis and pied flycatchers F. hypoleuca. 40 species-informative genetic markers allowed us to identify F1 hybrids, thus avoiding problems inherent in many studies that group hybrid genotypes. Furthermore, naturally occurring extra-pair paternity allowed us to test the immune responses of pure and hybrid nestlings to a novel antigen (phytohaemagglutinin) in a shared environment. In contrast to previous suggestions that animal hybrids may more often display resistance against parasites than plant hybrids, F1 hybrids exhibited prevalence of parasitism and immune responses that were intermediate between the two parental species. We also detected differences between the two parental species in their prevalence of infection, with the competitively dominant species (collared flycatcher) being less often infected by Haemoproteus. Overall, our results contribute to other recent data supporting the idea that the resistance of animals to parasites is variously and unpredictably affected by hybridization, and that there is a concordance in the general patterns observed in plants and animals. Haemosporidians in avian hybrids provide a useful system for investigating the interactions between hosts and parasites that characterize host contact zones.

  • 363. Wiley, Chris
    et al.
    Svedin, Nina
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi.
    Weissing, Franz J
    Qvarnström, Anna
    Asymmetrical hybridization: simulations and tests in natural hybrid zoneArtikkel i tidsskrift (Fagfellevurdert)
  • 364. Wilson, A
    et al.
    Ahnesjö, Ingrid
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för evolutionsbiologi. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi. Zooekologi.
    Vincent, A
    Meyer, A
    The dynamics of male brooding, mating patterns, and sex roles in pipefishes and seahorses (family Syngnathidae)2003Inngår i: Evolution, Vol. 57, s. 1374-1386Artikkel i tidsskrift (Fagfellevurdert)
  • 365. Zagalska-Neubauer, Magdalena
    et al.
    Babik, Wieslaw
    Stuglik, Michal
    Gustafsson, Lars
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi.
    Cichon, Mariusz
    Radwan, Jacek
    454 sequencing reveals extreme complexity of the class II Major Histocompatibility Complex in the collared flycatcher2010Inngår i: BMC Evolutionary Biology, ISSN 1471-2148, E-ISSN 1471-2148, Vol. 10, nr 1, s. 395-Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Background: Because of their functional significance, the Major Histocompatibility Complex (MHC) class I and II genes have been the subject of continuous interest in the fields of ecology, evolution and conservation. In some vertebrate groups MHC consists of multiple loci with similar alleles; therefore, the multiple loci must be genotyped simultaneously. In such complex systems, understanding of the evolutionary patterns and their causes has been limited due to challenges posed by genotyping. Results: Here we used 454 amplicon sequencing to characterize MHC class IIB exon 2 variation in the collared flycatcher, an important organism in evolutionary and immuno-ecological studies. On the basis of over 152,000 sequencing reads we identified 194 putative alleles in 237 individuals. We found an extreme complexity of the MHC class IIB in the collared flycatchers, with our estimates pointing to the presence of at least nine expressed loci and a large, though difficult to estimate precisely, number of pseudogene loci. Many similar alleles occurred in the pseudogenes indicating either a series of recent duplications or extensive concerted evolution. The expressed alleles showed unambiguous signals of historical selection and the occurrence of apparent interlocus exchange of alleles. Placing the collared flycatcher's MHC sequences in the context of passerine diversity revealed transspecific MHC class II evolution within the Muscicapidae family. Conclusions: 454 amplicon sequencing is an effective tool for advancing our understanding of the MHC class II structure and evolutionary patterns in Passeriformes. We found a highly dynamic pattern of evolution of MHC class IIB genes with strong signals of selection and pronounced sequence divergence in expressed genes, in contrast to the apparent sequence homogenization in pseudogenes. We show that next generation sequencing offers a universal, affordable method for the characterization and, in perspective, genotyping of MHC systems of virtually any complexity.

  • 366. Zbinden, M
    et al.
    Mazzi, D
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Teknisk-naturvetenskapliga fakulteten, Biologiska sektionen, Institutionen för evolutionsbiologi. Institutionen för ekologi och evolution, Zooekologi. Zooekologi.
    Kunzler, R
    Largiader, C
    Bakker, TCM
    Corting virtual rivals ioncrease ejaculate size in sticklebacks (Gasterosteus aculeatus)2003Inngår i: Behavioral Ecology and Sociobiology, Vol. 54, s. 205-209Artikkel i tidsskrift (Fagfellevurdert)
  • 367.
    Ödeen, Anders
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Teknisk-naturvetenskapliga fakulteten, Biologiska sektionen, Institutionen för evolutionsbiologi. Institutionen för ekologi och evolution, Zooekologi. Zooekologi.
    Björklund, Mats
    Institutionen för ekologi och evolution, Zooekologi.
    Dynamics in the evolution of sexual traits: losses and gains, radiation and convergence in yellow wagtails (Motacilla flava)2003Inngår i: Molecular Ecology, ISSN 09621083, Vol. 12, nr 8, s. 2113-2130Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We analyse patterns of genetic diversity and song complexity in the Palaearctic yellow wagtail (Motacilla flava), a highly polytypic species complex. Mitochondrial and nuclear DNA show that the complex is polyphyletic, despite parallel plumage variation i

  • 368.
    Ödeen, Anders
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi.
    Hart, Nathan S.
    School of Biomedical Sciences, The University of Queensland, Brisbane.
    Håstad, Olle
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för fysiologi och utvecklingsbiologi, Evolutionär organismbiologi.
    Assessing the use of genomic DNA as a predictor of the maximum absorbance wavelength of avian SWS1 opsin visual pigments2009Inngår i: Journal of Comparative Physiology A. Sensory, neural, and behavioral physiology, ISSN 0340-7594, E-ISSN 1432-1351, Vol. 195, nr 2, s. 167-173Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Recently, in vitro mutation studies have made it possible to predict the wavelengths of maximum absorbance (λmax) of avian UV/violet sensitive visual pigments (SWS1) from the identity of a few key amino acid residues in the opsin gene. Given that the absorbance spectrum of a cone's visual pigment and of its pigmented oil droplet can be predicted from just the λmax, it may become possible to predict the entire spectral sensitivity of a bird using genetic samples from live birds or museum specimens. However, whilst this concept is attractive, it must be validated to assess the reliability of the predictions of λmax from opsin amino acid sequences. In this paper, we have obtained partial sequences covering three of the known spectral tuning sites in the SWS1 opsin and predicted λmax of all bird species for which the spectral absorbance has been measured using microspectrophotometry. Our results validate the use of molecular data from genomic DNA to predict the gross differences in λmax between the violet- and ultraviolet-sensitive subtypes of SWS1 opsin. Additionally, we demonstrate that a bird, the bobolink Dolichonyx oryzivorus L., can have more than one SWS1 visual pigment in its retina.

  • 369.
    Ödeen, Anders
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi.
    Håstad, Olle
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för fysiologi och utvecklingsbiologi, Evolutionär organismbiologi.
    New Primers for the Avian SWS1 Pigment Opsin Gene Reveal New Amino Acid Configurations in Spectral Sensitivity Tuning Sites2009Inngår i: Journal of Heredity, ISSN 0022-1503, E-ISSN 1465-7333, Vol. 100, nr 6, s. 784-789Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Recently, polymerase chain reaction-based estimates of visual pigment spectral tuning from genomic DNA have offered an alternative to the authoritative but rather slow and complicated retinal microspectrophotometry method. The genomic DNA method involves sequencing a fragment of the short-wavelength sensitive pigment, type 1 (SWS1) opsin gene covering amino acid positions 86, 90, and 93 and has been utilized in a wide range of avian species. Other key tuning sites have been proposed but not sequenced in the genomic DNA-based spectral sensitivity studies. We have designed 5 new primers for sequencing gene fragments of the ultraviolet-/violet-tuned SWS1 opsin gene containing the first, second and third, and sixth and seventh α-helical transmembrane regions and the spectral tuning sites 49, 86, 90, 93, 116, 118 and 298. Testing these primers on various bird species reveals some novel combinations of amino acid residues at the tuning sites. The potential significance of these on spectral tuning is discussed.

  • 370.
    Ödeen, Anders
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi.
    Håstad, Olle
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för fysiologi och utvecklingsbiologi, Evolutionär organismbiologi.
    Pollinating birds differ in spectral sensitivity2010Inngår i: Journal of Comparative Physiology A. Sensory, neural, and behavioral physiology, ISSN 0340-7594, E-ISSN 1432-1351, Vol. 196, nr 2, s. 91-96Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Pollinating animals and their angiosperm hosts often show strong co-adaptation in traits that increase the likelihood of a successful transfer of pollen and nutrient rewards. One such adaptation is the reported colour difference caused by unequal distribution of anthocyanidin pigments amongst plant species visited by hummingbirds and passerines. This phenomenon has been suggested to reflect possible differences in the colour vision of these pollinating birds. The presence of any such difference in colour vision would arguably affect the ecological and evolutionary interactions between flowers and their visitors, accentuating differences in floral displays and attractiveness of plants to the favoured avian pollinators. We have tested for differences in colour vision, as indicated by the amino acid present at certain key positions in the short-wavelength-sensitive type 1 (SWS1) visual pigment opsin, between the major groups of pollinating birds: the non-passerine Trochilidae (hummingbirds), the passerine Meliphagidae (honeyeaters) and Nectariniidae (sunbirds) plus five other Passerida passerine families. The results reveal gross spectral sensitivity differences between hummingbirds and honeyeaters, on the one hand, and the Passerida species, on the other.

  • 371.
    Ödeen, Anders
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi.
    Håstad, Olle
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för fysiologi och utvecklingsbiologi, Evolutionär organismbiologi.
    Alström, Per
    Department of Vertebrate Zoology, Swedish Museum of Natural History.
    Evolution of ultraviolet vision in shorebirds (Charadriiformes)2010Inngår i: Biology Letters, ISSN 1744-9561, E-ISSN 1744-957X, Vol. 6, nr 3, s. 370-374Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Diurnal birds belong to one of two classes of colour vision. These are distinguished by the maximum absorbance wavelengths of the SWS1 visual pigment sensitive to violet (VS) and ultraviolet (UVS). Shifts between the classes have been rare events during avian evolution. Gulls (Laridae) are the only shorebirds (Charadriiformes) previously reported to have the UVS type of opsin, but too few species have been sampled to infer that gulls are unique among shorebirds or that Laridae is monomorphic for this trait. We have sequenced the SWS1 opsin gene in a broader sample of species. We confirm that cysteine in the key amino acid position 90, characteristic of the UVS class, has been conserved throughout gull evolution but also that the terns Anous minutus, A. tenuirostris and Gygis alba, and the skimmer Rynchops niger carry this trait. Terns, excluding Anous and Gygis, share the VS conferring serine in position 90 with other shorebirds but it is translated from a codon more similar to that found in UVS shorebirds. The most parsimonious interpretation of these findings, based on a molecular gene tree, is a single VS to UVS shift and a subsequent reversal in one lineage.

  • 372.
    Ödeen, Anders
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi.
    Moray, Clea M.
    Drosophila melanogaster virgins are more likely to mate with strangers than familiar flies2008Inngår i: Die Naturwissenschaften, ISSN 0028-1042, E-ISSN 1432-1904, Vol. 95, nr 3, s. 253-256Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Recent evidence shows that females of many species can discriminate against males and/or male phenotypes they have mated with previously. However, these studies have not tested whether actual mating is necessary to induce the avoidance behaviour. A preference for strangers may have evolved because it avoids multiple matings with similar genotypes. Alternatively, there may be selection against mating with familiar individuals directly. By choosing its first mate among unfamiliar individuals (which are less likely close relatives than are those encountered early in life), a virgin might disentangle some of the potential benefits of avoiding genetic incompatibility and inbreeding in the offspring from the costs of remating. In this study, we test whether Drosophila melanogaster flies bias their mate choice towards strangers according to previous, non-copulatory, experience. Based on 173 trials over 12 weeks, virgin females presented with two virgin males were 59% more likely to mate with a novel male than the one which she had been housed with for 8 h the day before. Hence we present the first report showing that a dipteran can distinguish between previously encountered and not previously encountered conspecifics.

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