Recent studies have increasingly demonstrated the widespread existence of spatio-
temporal variations in the abundance and distribution of species of freshwater fishes …

In many fish species, some individuals arediurnal while others are nocturnal. Sometimes,
the same individual can be diurnal at first andthen switch to nocturnalism, or vice-versa. This …

Given a choice between habitats differing only in food availability, prey are known to select
the habitat providing the highest energetic return. They do so in a frequency‐dependent …

The annual record of fossil pigments and zooplankton was compared with detailed
contemporaneous records from two manipulated lakes from 1940 to 1986. Annually …

La caractérisation des peuplements de poissons du littoral de petits lacs (50 ha) du centre
de l'Ontario a permis d'évaluer l'impact de la prédation de l'Achigan à petite bouche …

Whatever theory may be advanced to explain diurnal migration, the underlying reactions
involved must be demonstrated conc-sively in the laboratory before the explanation can be …

The nearshore areas are crucial in providing habitat for most of the fish species in the Great
Lakes, during at least one life stage. Nearshore areas are also the locations of greatest …

Predators may affect their prey both directly by eating them and indirectly by affecting their
behaviors. The behavioral, non-numerical, effects of predator presence on the relative …

Background In lake ecosystems, predatory fish can move and forage across both nearshore
and offshore habitats. This coupling of sub-habitats, which is important in stabilizing lake …

Ecologists have recently focused much attention on quantifying the strengths and relative
importance of resource-based (bottom-up) and predator-based (top-down) forces in food …