Ecology and Evolution of Adaptive Morphological Variation in Fish Populations
Intraspecific competition drives increased resource use diversity within a natural population
Genetic variation and phenotypic plasticity : causes of morphological variation in Eurasian perch
Question: What is the importance of genetic variation and phenotypic plasticity in formingthe morphological difference between littoral and pelagic perch?
Organism: Juveniles of Eurasian perch (Perca fluviatilis L.).
Site: Enclosures ...
Predation risk influences adaptive morphological variation in fish populations
Predators can cause a shift in both density and frequency of a prey phenotype that may lead to phenotypic divergence through natural selection. What is less investigated is that predators have a variety of indirect effects on prey that could potentially have large evolutionary responses. We condu...
Individual diet specialization, niche width and population dynamics : implications for trophic polymorphisms
1. We studied a perch Perca fluviatilis L. population that during a 9-year period switched between a phase of dominance of adult perch and a phase dominated by juvenile perch driven by cannibalism and intercohort competition. We investigated the effects of these population fluctuations on indivi...
Intraspecific competition drives increased resource use diversity within a natural population
Comparative support for the niche variation hypothesis that more generalized populations also are more heterogeneous
Water Transparency Drives Intra-Population Divergence in Eurasian Perch (Perca fluviatilis)
Comparative support for the niche variation hypothesis that more generalized populations also are more heterogeneous
Cannibalism in a size-structured population : energy extraction and control
Recent size-structured cannibalistic models point to the importance of the energy gain by cannibals and also show that this gain may result in the emergence of giant individuals. We use a combination of a 10-year field study of a perch (Perca fluviatilis) population and quantitative within-season...