Diel-activity

Guides

• Chrysops celatus

  deer fly

  Chrysops celatus is a species of deer fly in the family Tabanidae, first described by Pechuman in 1949. It exhibits diel host-seeking activity patterns and has been recorded in northwest Florida and Vermont, USA. The species is currently considered a synonym of Chrysops atlanticus by some taxonomic authorities.

  Tabanidaedeer-flybiting-flyNorth-Americasynonymblood-feedingdiel-activity

• 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.

  freshwaterloticamphipodpredator-preybehavioral-ecologytoxicologyunivoltineNorth-Americamodel-organismstream-ecologysize-selective-predationchemical-ecologyparasitismacanthocephalacopper-toxicitymate-guardingcalceolimicrohabitat-selectionthigmotaxisdiel-activityseasonal-dynamicsproduction-ecologydriftbrook-troutsculpinOntarioVirginiaGammaridaecrustaceaninvertebratesenticaudataBousfield-1958Northern-Spring-Amphipod