Contrasted optimal environmental windows for both sardinella species in Senegalese waters
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 w...
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ftird:oai:ird.fr:fdi:010073102 2023-05-15T17:33:29+02:00 Contrasted optimal environmental windows for both sardinella species in Senegalese waters Diankha, O. Ba, A. Brehmer, Patrice Brochier, Timothée Sow, B. A. Thiaw, M. Gaye, A. T. Ngom, F. Demarcq, Hervé SENEGAL ATLANTIQUE 2018 text/pdf http://www.documentation.ird.fr/hor/fdi:010073102 EN eng http://www.documentation.ird.fr/hor/fdi:010073102 oai:ird.fr:fdi:010073102 Diankha O., Ba A., Brehmer Patrice, Brochier Timothée, Sow B. A., Thiaw M., Gaye A. T., Ngom F., Demarcq Hervé. Contrasted optimal environmental windows for both sardinella species in Senegalese waters. Fisheries Oceanography, 2018, 27 (4), p. 351-365. recruitment success Sardinella aurita Sardinella maderensis upwelling West Africa text 2018 ftird 2020-08-21T06:49:48Z 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 the sea surface temperature for S.aurita and S.maderensis, respectively. We report that recruitment success of S.aurita and S.maderensis are associated with distinct ranges of sea surface temperature, upwelling intensity, wind-induced turbulence, concentration of chlorophyll-a and north Atlantic oscillation index. Considering food security and socio-economic importance of both stocks, we recommend that consideration is given to the environmental variability in the small pelagic fish national management plans, particularly in the context of climate change. Text North Atlantic North Atlantic oscillation IRD (Institute de recherche pour le développement): Horizon Gam ENVELOPE(-57.955,-57.955,-61.923,-61.923) |
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Open Polar |
collection |
IRD (Institute de recherche pour le développement): Horizon |
op_collection_id |
ftird |
language |
English |
topic |
recruitment success Sardinella aurita Sardinella maderensis upwelling West Africa |
spellingShingle |
recruitment success Sardinella aurita Sardinella maderensis upwelling West Africa Diankha, O. Ba, A. Brehmer, Patrice Brochier, Timothée Sow, B. A. Thiaw, M. Gaye, A. T. Ngom, F. Demarcq, Hervé Contrasted optimal environmental windows for both sardinella species in Senegalese waters |
topic_facet |
recruitment success Sardinella aurita Sardinella maderensis upwelling West Africa |
description |
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 the sea surface temperature for S.aurita and S.maderensis, respectively. We report that recruitment success of S.aurita and S.maderensis are associated with distinct ranges of sea surface temperature, upwelling intensity, wind-induced turbulence, concentration of chlorophyll-a and north Atlantic oscillation index. Considering food security and socio-economic importance of both stocks, we recommend that consideration is given to the environmental variability in the small pelagic fish national management plans, particularly in the context of climate change. |
format |
Text |
author |
Diankha, O. Ba, A. Brehmer, Patrice Brochier, Timothée Sow, B. A. Thiaw, M. Gaye, A. T. Ngom, F. Demarcq, Hervé |
author_facet |
Diankha, O. Ba, A. Brehmer, Patrice Brochier, Timothée Sow, B. A. Thiaw, M. Gaye, A. T. Ngom, F. Demarcq, Hervé |
author_sort |
Diankha, O. |
title |
Contrasted optimal environmental windows for both sardinella species in Senegalese waters |
title_short |
Contrasted optimal environmental windows for both sardinella species in Senegalese waters |
title_full |
Contrasted optimal environmental windows for both sardinella species in Senegalese waters |
title_fullStr |
Contrasted optimal environmental windows for both sardinella species in Senegalese waters |
title_full_unstemmed |
Contrasted optimal environmental windows for both sardinella species in Senegalese waters |
title_sort |
contrasted optimal environmental windows for both sardinella species in senegalese waters |
publishDate |
2018 |
url |
http://www.documentation.ird.fr/hor/fdi:010073102 |
op_coverage |
SENEGAL ATLANTIQUE |
long_lat |
ENVELOPE(-57.955,-57.955,-61.923,-61.923) |
geographic |
Gam |
geographic_facet |
Gam |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
http://www.documentation.ird.fr/hor/fdi:010073102 oai:ird.fr:fdi:010073102 Diankha O., Ba A., Brehmer Patrice, Brochier Timothée, Sow B. A., Thiaw M., Gaye A. T., Ngom F., Demarcq Hervé. Contrasted optimal environmental windows for both sardinella species in Senegalese waters. Fisheries Oceanography, 2018, 27 (4), p. 351-365. |
_version_ |
1766132001640808448 |