Mixed-life-history
Guides
Haustorius canadensis
Haustorius canadensis is a sand-burrowing amphipod in the family Haustoriidae, found in sandy beach ecosystems of northern New England. The species exhibits a mixed annual–biennial life history, with approximately half the population reproducing after one year and the remainder after two years. It is a dominant member of intertidal macro-infauna communities, co-occurring with Acanthohaustorius millsi and Amphiporeia virginiana. Population dynamics show seasonal movements upshore in spring and downshore in autumn and winter.