Revista de Gestão Costeira Integrada
Volume 13, Número 4, Dezembro 2013, Páginas 491-497

DOI: 10.5894/rgci421
* Submission: 3 June 2013; Evaluation: 15 July 2013; Reception of revised manuscript: 23 July 2013; Accepted: 2 August 2013; Available on-line: 3 September 2013
** Portuguese Title and captions by Ulisses M Azeiteiro on behalf of the Journal Editorial Board

Seasonal variability of sea surface temperature, chlorophyll-a and Ethmalosa fimbriata abundance off the coast of Senegal *

Variabilidade sazonal da temperatura da superfície do mar, clorofila-a e abundância de Ethmalosa fimbriata na Zona Costeira do Senegal **

Ousmane Diankha ^{@, 1}, Bamol Ali Sow ², Modou Thiaw ³,
Amadou Thierno Gaye ¹

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@ - Corresponding author
1 - Laboratoire de Physique de l’Atmosphère et de l’Océan Siméon Fongang (LPAO-SF/ESP-UCAD, Sénégal), BP 5085 Dakar Fann. E-mail: Diankha ousmane.diankha@ucad.edu.sn Gaye
2 - Laboratoire d’Océanographie, des Sciences de l’Environnement et du Climat (LOSEC) Département de Physique - UFR Sciences & Technologies - Université de Ziguinchor BP 523 Ziguinchor – Sénégal  Email: 
3 - Centre de Recherche Océanographique de Dakar-Thiaroye (CRODT, ISRA Sénégal). Email:

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ABSTRACT
The seasonal variability of Ethmalosa fimbriata abundance off Senegal Coastal Waters was investigated using an observation sea surface temperature (SST) and chlorophyll-a (Chl-a) concentration from PATHFINDER and SeaWiFS satellites’ data of 1999-2009. The results showed that the variability of E. fimbriata landings in Senegalese waters is related to environmental changes. The seasonal fluctuations of E. fimbriata landings off Senegal Coastal Waters seemed to be governed by the combined effect of SST and Chl-a. However, SST better explains the seasonal variations of E. fimbriata landings than Chl-a, when they are used separately.

Keywords: Chlorophyll-a, Ethmalosa fimbriata, Sea surface temperature, Senegal.

RESUMO
A variabilidade sazonal da abundância de Ethmalosa fimbriata na Zona Costeira do Senegal foi investigada através da observação da temperatura da superfície do mar (TSM) e da concentração de clorofila-a (Chl-a) a partir de dados dos anos de 1999-2009, provenientes dos satélites PATHFINDER e SeaWiFS. Os resultados observados mostraram que a variabilidade da pesca de E. fimbriata em águas senegalesas aparentemente está relacionada com as mudanças ambientais. As flutuações sazonais na pesca de E. fimbriata na Zona Costeira do Senegal parece ser controlada pelo efeito combinado da TSM e Chl-a. Porem, a TSM explica melhor as variações sazonais na pesca de E. fimbriata que a Chl-a, quando estas variáveis são utilizadas separadamente.

Palavras-chave: Clorofila-a, Ethmalosa fimbriata, Temperatura da superfície do mar, Senegal.

 

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