uu.seUppsala universitets publikasjoner
Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Habitat structure, feeding mode and morphological reversibility: factors influencing phenotypic plasticity in perch
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Limnologi.
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Limnologi.
2005 (engelsk)Inngår i: Evolutionary Ecology Research, ISSN 1522-0613, E-ISSN 1937-3791, Vol. 7, nr 8, s. 1109-1123Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Questions: Do both habitat structure and feeding mode contribute to morphological divergence within fish populations? To what extent may an induced morphology be reversed?

Organism: Young-of-the-year Eurasian perch (Perca fluviatilis L.).

Methods: An aquarium experiment with a 2 × 2 factorial design (two levels of habitat structure and two levels of feeding mode). The habitat structure and feeding mode were reversed for perch in two habitat treatments midway through the experiment.

Results: Both habitat structure and feeding mode contributed to morphological divergence (40.7% and 4.9% of the total variation respectively), which suggests that both habitat complexity and prey type diversity influence morphological adaptations in this fish species. Perch morphology is highly plastic and can be reversed in as short a time as 4 weeks.

 

sted, utgiver, år, opplag, sider
2005. Vol. 7, nr 8, s. 1109-1123
Emneord [en]
feeding mode, geometric morphometrics, habitat structure, morphological reversibility, phenotypic plasticity, trophic polymorphism
Identifikatorer
URN: urn:nbn:se:uu:diva-88665OAI: oai:DiVA.org:uu-88665DiVA, id: diva2:158847
Tilgjengelig fra: 2009-02-06 Laget: 2009-02-04 Sist oppdatert: 2017-12-14bibliografisk kontrollert
Inngår i avhandling
1. Interplay Between Environment and Genes on Morphological Variation in Perch – Implications for Resource Polymorphisms
Åpne denne publikasjonen i ny fane eller vindu >>Interplay Between Environment and Genes on Morphological Variation in Perch – Implications for Resource Polymorphisms
2006 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

Recent research has suggested that individual specialization within populations could be substantial and more common than previously acknowledged. Eurasian perch is one of many species of fish in lakes of postglacial origin that displays a morphological and dietary variation tightly coupled to the littoral and pelagic habitats of the lake. The occurrence of such resource polymorphisms might have important consequences for local adaptation and might also be an important initial step in speciation.

I have investigated the importance of a number of factors for the development of resource polymorphisms using perch as a study organism. I found a weak genetic basis for morphological differences, and the environmental influence on morphology was of such a magnitude that an induced morphology could be reversed. The results nevertheless suggested that genetic differentiation could be substantial at small spatial and temporal scales, even within habitats. Several environmental factors were shown to influence the morphological development, and the results also suggest that behavioral differences could mediate a morphological response. I also found evidence for that competition-driven divergence might only occur when divergence in resource use is favoured at the same time as growth rates are kept sufficiently high for character divergence to be effective. The results finally indicate that divergence in the gut length of individuals might co-vary with habitat and diet use in resource polymorphic populations. This might enhance habitat fidelity and possibly also facilitate the persistence of resource polymorphisms since individuals should experience a cost of switching diets due to a too specific digestive system.

Based on these findings I conclude that small scaled genetic differentiation might be more common than currently acknowledged, that more multi-factorial studies are needed if we are to fully understand the mechanisms behind trait diversity, and that competition not always favors divergence.

sted, utgiver, år, opplag, sider
Uppsala: Acta Universitatis Upsaliensis, 2006. s. 55
Serie
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 235
Emneord
Ecology, Perch, Resource polymorphism, Genetic differentiation, Phenotypic plasticity, Morphology, Competition, Character divergence, Behavior, Growth rate, Resource level, Gut lenght, Ekologi
Identifikatorer
urn:nbn:se:uu:diva-7212 (URN)91-554-6696-6 (ISBN)
Disputas
2006-11-28, Lindahlssalen, Kärnhuset, EBC, Norbyvägen 18, 752 36, Uppsala, 10:00 (engelsk)
Opponent
Veileder
Tilgjengelig fra: 2006-11-07 Laget: 2006-11-07 Sist oppdatert: 2011-04-20bibliografisk kontrollert

Open Access i DiVA

fulltekst(182 kB)2371 nedlastinger
Filinformasjon
Fil FULLTEXT01.pdfFilstørrelse 182 kBChecksum SHA-512
aa7100eaec8728041700c0ef88c48dd077757a4a39c7e1a0d3514a6cb3b4744cac81ffeb3789046f3e616512105bbb4ebae92f59a42584ea9663dab7aea6bc24
Type fulltextMimetype application/pdf

Personposter BETA

Eklöv, Peter

Søk i DiVA

Av forfatter/redaktør
Eklöv, Peter
Av organisasjonen
I samme tidsskrift
Evolutionary Ecology Research

Søk utenfor DiVA

GoogleGoogle Scholar
Totalt: 2371 nedlastinger
Antall nedlastinger er summen av alle nedlastinger av alle fulltekster. Det kan for eksempel være tidligere versjoner som er ikke lenger tilgjengelige

urn-nbn

Altmetric

urn-nbn
Totalt: 756 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf