Contrasted optimal environmental windows for both sardinella species in Senegalese waters

• DOI: 10.1111/fog.12257
• Publication Date: 2018-01-30T07:33:04Z
• Authors: Ousmane Diankha; Aliou Ba; Patrice Brehmer; Timothée Brochier; Bamol Ali Sow; Modou Thiaw; Amadou Thierno Gaye; Fambaye Ngom; Hervé Demarcq
• Keywords: Sardinella

Abstract We investigate Sardinella aurita and maderensis recruitment success relative to the variability of oceanographic conditions in Senegalese waters using generalized additive models ( GAM ). Results show that both species is marked by a strong intra‐annual (seasonal) variation with minimum maximum winter summer, respectively. Their interannual variations are synchronous until 2006 (recruitment decreasing), while from 2007 there no synchrony. The model developed shows sardinella closely related tested environmental variables study area. However, key influencing different for species: Coastal Upwelling Index sea surface temperature S. , report associated distinct ranges temperature, upwelling intensity, wind‐induced turbulence, concentration chlorophyll‐ north Atlantic oscillation index. Considering food security socio‐economic importance stocks, we recommend consideration given small pelagic fish national management plans, particularly context climate change.