Interspecific Relationships and Environmentally Driven Catchabilities Estimated from Fisheries Data

摘要: A modelling framework is proposed to investigate possible interactions among fisheries, species, and shared environmental drivers. Two hypotheses that introduce temporal dependence commercial recreational catch effort data from Lake Erie’s walleye (Sander vitreus) yellow perch (Perca flavescens) stocks are evaluated using state space models. First, alternative forms of association between the mortality, recruitment, or migration two species explored by in interspecific process noise. Second, annual phosphorus inputs into Erie, which linked development hypoxia, tested for associations with catchabilities fisheries. Interspecific noise was positively associated, suggests perch. Only perch, however, loading associated catchability. The estimated probability either stock fell below a commo...