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Test of Biotic and Abiotic Environmental Determinants of Amphipod (Hyalella azteca) Preamplexus

1987; Canadian Science Publishing; Volume: 44; Issue: 2 Linguagem: Inglês

10.1139/f87-058

1205-7533

Robert France,

Environmental Toxicology and Ecotoxicology

Variation in reproductive behavior (preamplexus) of the amphipod Hyalella azteca among 10 Canadian Shield lakes in Ontario was positively correlated with water temperature, possibly through its influence on either activity patterns or diapausal endocrinology. Intensity of preamplexus was not correlated with other abiotic variables including lake pH, alkalinity, total phosphorus, or chlorophyll a concentration. Similarly, the complicated evolutionary "strategies" suggested by Strong involving alterations in optimal mating tactics in response to differences in intensity offish predation, amphipod density, or habitat heterogeneity did not occur in these lakes.