Sculpin

Guides

Gammarus pseudolimnaeus
Northern Spring Amphipod
Gammarus pseudolimnaeus is a freshwater amphipod crustacean inhabiting lotic (flowing water) environments in North America. The species exhibits complex behavioral ecology, including size-selective predation vulnerability to fish predators such as brook trout and sculpins, and chemically-mediated responses to predation risk that influence reproductive behavior. Population dynamics are characterized by univoltine (single annual) generation cycles with high mortality during early life stages and winter periods. The species serves as an important prey item in stream food webs and has been extensively studied as a model organism for freshwater invertebrate ecology, toxicology, and predator-prey interactions.
freshwater lotic amphipod predator-prey behavioral-ecology toxicology univoltine North-America model-organism stream-ecology size-selective-predation chemical-ecology parasitism acanthocephala copper-toxicity mate-guarding calceoli microhabitat-selection thigmotaxis diel-activity seasonal-dynamics production-ecology drift brook-trout sculpin Ontario Virginia Gammaridae crustacean invertebrate senticaudata Bousfield-1958 Northern-Spring-Amphipod