Trophic-partitioning
Guides
Cambarus robustus
Big Water Crayfish, robust crayfish
Cambarus robustus, commonly known as the Big Water Crayfish or robust crayfish, is a freshwater crayfish species in the family Cambaridae. It is native to eastern North America, ranging from several U.S. states to Ontario, Canada. The species has been studied extensively as a surrogate for federally endangered crayfish species due to its close phylogenetic relationships and similar ecological requirements. Research indicates it demonstrates significant acid tolerance compared to sympatric Orconectes species, exhibits complex agonistic behaviors with distinct initiation acts predicting contest outcomes, and occupies a partitioned trophic position in multi-species crayfish communities.