Most empirical and theoretical studies of resource use and population dynamics treat
conspecific individuals as ecologically equivalent. This simplification is only justified if …

The phenotypic diversity exhibited within and among populations of freshwater fishes in
postglacial lakes has intrigued biologists for two reasons:(i) their high phenotypic variation …

Eurasian perch Perca fluviatilis has been a popular model species for decades in the fields
of aquatic ecology, community dynamics, behaviour, physiology and ecotoxicology. Yet …

Studies on resource polymorphism have mainly been considered at the end stage of
ontogeny, whereas many species undergo diet changes as they grow. We conducted a field …

Background How particular changes in functional morphology can repeatedly promote
ecological diversification is an active area of evolutionary investigation. The African rift-lake …

Trade‐offs in foraging efficiency leading to divergent natural selection between and within
populations exploiting different resources are thought to be a primary cause of trophic …

Investigations on the functional niche of organisms have primarily focused on differences
among species and tended to neglect the potential effects of intraspecific variability despite …

The ability of organisms to plastically respond to changing environments is well studied.
However, variation in phenotypic plasticity during ontogeny is less well understood despite …

Methods: Adults from the littoral and pelagic habitats were bred separately andtheir offspring
were raised in enclosures with either open water or vegetation in an artificialpond. Results …

The shape development through ontogeny of the gilthead sea bream Sparus aurata was
studied by means of geometric morphometry and elliptic Fourier analysis. In parallel …