Geographic variability of sardine growth across the northeastern Atlantic and the Mediterranean Sea
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AuthorsSilva, A. (Alexandra); Carrera, P. (Pablo); Massé, J. (Jacques); Uriarte, A. (Andrés); Santos, M.B. (María Begoña); Oliveira, P.B. (Paulo); Soares, E. (Eduardo); Porteiro-Lago, C. (Carmen); Stratoudakis, Y. (Yorgos)
This study describes broad-scale spatial variations in sardine growth across the northeastern Atlantic and Mediterranean waters using opportunistic samples collected in recent years. More detailed information on spatial, decadal and seasonal growth variations is provided for the Iberian-Biscay region using data collected in acoustic surveys since the mid-1980s. Growth curves are fitted to annual or monthly length-at-age data using a robust Von Bertalanffy model; parameters for recent samples are compared with literature information using an auximetric plot while differences between areas within the Iberian-Biscay region are tested by log-likelihood ratio tests. Sardine growth performance is generally lower in the Mediterranean and declines across the northeastern Atlantic from the English Channel to north Morocco but increases sharply off Mauritania. Lower growth of Mediterranean sardines is possibly associated to the overall oligotrophy of this Sea while differentiation from the Atlantic ...
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