Resilience of Key Biological Parameters of the Senegalese Flat Sardinella to Overfishing and Climate Change

Type Article
Date 2016-06
Language English
Author(s) Ba KamarelORCID1, 2, Thiaw Modou1, Lazar Najih3, Sarr Alassane2, Brochier Timothee1, 5, Ndiaye Ismaila2, Faye Alioune2, Sadio Oumar5, Panfili Jacques4, Thiaw Omar Thiom2, Brehmer PatriceORCID1, 5
Affiliation(s) 1 : ISRA, CRODT, Dakar, Senegal.
2 : UCAD, IUPA, Dakar, Senegal.
3 : Univ Rhode Isl East Farm, Dept Fisheries, Kingston, RI USA.
4 : Univ Montpellier 2, UMR Marbec, IRD, Montpellier 5, France.
5 : IRD, UMR Lemar 195, Dakar, Senegal.
Source Plos One (1932-6203) (Public Library Science), 2016-06 , Vol. 11 , N. 6 , P. e0156143 (20p.)
DOI 10.1371/journal.pone.0156143
WOS© Times Cited 13
Abstract The stock of the Senegalese flat sardinella, Sardinella maderensis, is highly exploited in Senegal, West Africa. Its growth and reproduction parameters are key biological indicators for improving fisheries management. This study reviewed these parameters using landing data from small-scale fisheries in Senegal and literature information dated back more than 25 years. Age was estimated using length-frequency data to calculate growth parameters and assess the growth performance index. With global climate change there has been an increase in the average sea surface temperature along the Senegalese coast but the length-weight parameters, sex ratio, size at first sexual maturity, period of reproduction and condition factor of S. maderensis have not changed significantly. The above parameters of S. maderensis have hardly changed, despite high exploitation and fluctuations in environmental conditions that affect the early development phases of small pelagic fish in West Africa. This lack of plasticity of the species regarding of the biological parameters studied should be considered when planning relevant fishery management plans.
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Publisher's official version 20 3 MB Open access
S1 Fig. Wetherall [28] plot of Sardinella maderensis, leading to an estimate of L∞ = 33.40 cm. 1 193 KB Open access
S2 Fig. K-scan routine for the size-frequency data of Sardinella maderensis in ELEFAN (Daniel Pauly, unpublish). 1 195 KB Open access
S3 Fig. Seasonalized von Bertalanffy growth curve (with L∞ = 33.9 cm, K = 0.4 year-1, C = 1 year-1, WP = 0.15 and Rn = 0.21) of Sardinella maderensis off the northern coast superimposed over the... 1 221 KB Open access
S4 Fig. Seasonalized von Bertalanffy growth curve (with L∞ = 32.1 cm, K = 0.38 year-1, C = 1 year-1, WP = 0.15 and Rn = 0.21) of Sardinella maderensis off the southern coast superimposed over the... 1 223 KB Open access
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Ba Kamarel, Thiaw Modou, Lazar Najih, Sarr Alassane, Brochier Timothee, Ndiaye Ismaila, Faye Alioune, Sadio Oumar, Panfili Jacques, Thiaw Omar Thiom, Brehmer Patrice (2016). Resilience of Key Biological Parameters of the Senegalese Flat Sardinella to Overfishing and Climate Change. Plos One, 11(6), e0156143 (20p.). Publisher's official version : https://doi.org/10.1371/journal.pone.0156143 , Open Access version : https://archimer.ifremer.fr/doc/00616/72851/