Detecting the effects of inter-annual and seasonal changes in environmental factors on the striped red mullet population in the Bay of Biscay

Climate fluctuations affect a wide range of environmental factors that may impact fish populations with various response mechanisms. For major part world fisheries stocks, only abundance time-series are available. Relations between these species and ocean variables, including long term trends patterns seasonal change, remain sparsely documented. The main aim our work is to determine what extent effects inter-annual changes in can be identified quantified on selected data-set: the striped red mullet population within Bay Biscay. 8 Landings per unit effort (LPUE) for data compared covariates extracted from Copernicus web database. Our strategy decompose change into long-term components analyse possible dependency both factors. overall tendencies decrease component modification seasonality, additional spatial variability. observed discussed against spatio-temporal High heterogeneity Biscay was found, changes. Most related In addition well-known annual fluctuation, most coastal sites revealed bi-annual seasonality possibly recruitment process.