Balde B. S. auteur aut IRD Doring J. auteur aut IRD Ekau W. auteur aut IRD Diouf M. auteur aut IRD Brehmer Patrice auteur aut IRD text journalArticle eng text/pdf reformatted digital access Successful recruitment in small pelagic fish populations inhabiting upwelling zones is subject to variation in fecundity and is driven by spatial and temporal fluctuations in environmental conditions, that is, mainly sea surface temperature, salinity and food availability. These fluctuations in abiotic factors have stimulated small pelagic fish populations to exhibit specifically adapted spawning tactics. To better understand to what extent a short-lived exploited fish species such as bonga shad Ethmalosa fimbriata has adapted to an upwelling environment, we have investigated the interrelationship between upwelling intensity as a proxy for productivity and population fecundity by means of a virtual population analysis. We found that females of intermediate size contributed significantly more eggs to the population's fecundity than smaller or larger ones. Our model results further indicate that E. fimbriata exhibits a spawning preference at water temperatures of around 25 degrees C and upwelling intensities of around 2.5 m(3) s(-1) m(-1). Hence, we hypothesize that climate change-driven increases in sea temperatures and modifications of upwelling-favourable winds could significantly impact the species' reproductive biology. To understand how climate change might impact fisheries, spawning tactics of small pelagic fishes are important to assess as well as their recruitment success. Such information is particularly relevant in countries where the fishery is critical at socio-economic level, to better implement fisheries management addressing multiple stressors. specialized climate change clupeid data-poor fisheries fecundity optimal environmental window reproductive adaptation small pelagic fish SENEGAL ATLANTIQUE ZONE TROPICALE 036 034 040 28 6 686-697 2019 1054-6006 https://www.documentation.ird.fr/hor/fdi:010077053 10.1111/fog.12451 1054-6006 [F B010077053] https://www.documentation.ird.fr/hor/fdi:010077053 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers19-10/010077053.pdf IRD - Base Horizon / Pleins textes 2019-11-05 2025-02-24 fdi:010077053 fre