Annual routines and life history of the amphipod Onisimus litoralis: seasonal growth, body composition and energy budget.

The article discusses a study which reported the seasonality in growth rate and cellular energy allocation, timing of maturation, egg production and brood release through a full annual cycle of Onisimus litorafis, a lysianassoid amphipod dominating soft bottoms in the intertidal zone in the high Arctic. The study observed that the amphipod follows a semelparous 2-year life cycle, with growth and development mainly taking place in summer and a slow growth in winter. It also noted that the life history observed is similar to that of previous, studies but does not support iteroparity.