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DEPE | Séminaires BEEPSS / BEEPSS Seminars » Small pelagic fish population dynamics

Small pelagic fish population dynamics

Dernière mise à jour : jeudi 12 mars 2020, par Catherine Berger

Presented by : Claire Saraux, IPHC-DEPE
Date : Thursday 9th April 2020, 13:00-14:30
Place : Amphithéàtre Grünewald, Bâtiment 25

Around 2008, an ecosystem shift occurred in the Gulf of Lions, highlighted by considerable changes in biomass and fish mean weight of its two main small pelagic fish stocks (European anchovy ; European sardine). Surprisingly these changes did not appear to be mediated by a decrease in fish recruitment rates (which remained high) or by a high fishing pressure (exploitation rates being extremely low). To understand these population’s dynamics, we used an integrative ecosystem approach exploring alternative hypotheses, ranging from bottom-up to top-down control, not forgetting epizootic diseases.