Badji L.B. auteur aut IRD Tiedemann M. auteur aut IRD Fock H.O. auteur aut IRD Ndiaye P. auteur aut IRD Jouffre Didier auteur aut IRD text conferencePaper eng text/pdf reformatted digital access Early life stages of dominant West African pelagic fishes, most of which are commercially important, are rarely studied especially in Senegalese and Mauritanian coastal waters. The aim of the present study is to examine the horizontal distribution of pelagic fish eggs of Atlantic sardine (Sardina pilchardus), anchovy (Engraulis encrasicolus), sardinella (Sardinella aurita) and horse mackerels (Trachurus trachurus.) in late winter and summer. The two seasons revealed two contrasting environmental conditions. While in late winter a permanent upwelling shaped the environmental conditions, in summer a warm tropical influx of surface water towards Mauritania was observed. We collected fish eggs in both seasons along the shelf coasts of Mauritania and Senegal. These data were then related to the sea surface temperature obtained at each sampling position from a conductivity-temperature-depth (CTD) instrument. This study showed that eggs of most species are concentrated in the coastal waters in front the Banc d'Arguin, in Saint-Louis and along the Petite-côte of Senegal. Moreover, it has been shown that spatial distribution of fish eggs is controlled by several factors such as temperature and also by the role of the continental shelf-break, as a mechanism of retention of fish eggs and larvae. specialized AFRIQUE DE L'OUEST MAURITANIE SENEGAL ATLANTIQUE 040 126 021 ICAWA : International Conference AWA, 3., Dakar (SEN), 2016/12/13-15 60 Brehmer Patrice ed. edt IRD Ba B. ed. edt IRD Kraus G. ed. edt IRD Dakar SRFC/CSRP 2017 https://www.documentation.ird.fr/hor/fdi:010072119 978-2-9553602-0-5 [F A010071832] https://www.documentation.ird.fr/hor/fdi:010072119 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers18-01/010072119.pdf IRD - Base Horizon / Pleins textes 2018-01-29 2018-02-05 fdi:010072119 fre