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| Diankha, Ousmane; Ba, Aliou; Brehmer, Patrice; Brochier, Timothee; Sow, Bamol Ali; Thiaw, Modou; Gaye, Amadou Thierno; Ngom, Fambaye; Demarcq, Herve. |
| We investigate Sardinella aurita and Sardinella maderensis recruitment success relative to the variability of oceanographic conditions in Senegalese waters using generalized additive models (GAM). Results show that recruitment of both species is marked by a strong intra-annual (seasonal) variation with minimum and maximum in winter and summer, respectively. Their interannual variations are synchronous until 2006 (recruitment decreasing), while from 2007 there is no synchrony. The model developed shows that sardinella recruitment variability is closely related to the tested environmental variables in the study area. However, the key environmental variables influencing the recruitment success are different for both species: the Coastal Upwelling Index and... |
| Tipo: Text |
Palavras-chave: Recruitment success; Sardinella aurita; Sardinella maderensis; Upwelling; West Africa. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00611/72299/71189.pdf |
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| Fromentin, Jean-marc. |
| A recent body of literature has demonstrated that older females produce larvae and offsprings that have much higher survival and growth than do younger adults and that they furthermore play a key role in the adaptability, persistence and productivity of the exploited fish populations. These findings, that have been shown for several pelagic, groundfish and rockfish species, are, thus, worth to consider for tuna and tuna-like species. The aim of this modest and brief paper is solely to draw the attention from the SCRS to this issue which may have considerable impacts on management regulations. |
| Tipo: Text |
Palavras-chave: Age structure; Genetic diversity; Recruitment success; Sustainability; Management. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/00192/30333/28808.pdf |
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