Aquat. Living Resour.
Volume 30, 2017
Ecosystem Approach to the management of fisheries and the marine environment in West African waters conference
|Number of page(s)||8|
|Published online||04 August 2017|
Studying the contribution of different fishing gears to the Sardinella small-scale fishery in Senegalese waters
Université Cheikh Anta Diop (UCAD), Ecole supérieure polytechnique, Laboratoire de Physique de l'Atmosphère et de l'Océan Siméon Fongang (LPAO-SF),
2 Institut de Recherche pour le Développement (IRD), UMR 248 MARBEC (Marine Biodiversity, Exploitation and Conservation), CS 30171, 34203 Sète, France
3 Institut Sénégalais de Recherches agricoles (ISRA), Centre de Recherches Océanographiques de Dakar-Thiaroye, PRH, BP 2241 Dakar, Senegal
4 Institut de Recherche pour le Développement (IRD), UMR 195 Lemar (Laboratory of Marine Environment), BP 1386 Hann, Dakar, Senegal
5 Université Assane Seck de Ziguinchor (UASZ), Laboratoire d'Océanographie, des Sciences de l'Environnement et du Climat (LOSEC), Département de Physique, UFR Sciences & Technologies, BP 523 Ziguinchor, Senegal
* Corresponding author: firstname.lastname@example.org
Handling Editor: Verena Trenkel
Accepted: 30 June 2017
This study investigated variations of landings of two key species, Sardinella aurita and Sardinella maderensis, in Senegalese waters over a ten-year period (2004–2013). Using generalized additive models, it was found that fishing gear played a major role in explaining differences in monthly landings for both species (51–71% deviance explained). Its effect was more significant in the southern part of Senegal. Fishing effort (number of trips) accounted only for 4–18% of variability in landings. Purse seine (PS) fishing was the most important contributor to the landings of both species. In addition, in the southern area, surrounding gillnet fishing was also important for S. maderensis. Modeling results showed that the relationship between monthly effort and landings was generally positive and leveling off, while it was dome shaped for PSs and surrounding gillnets. Thus, when estimating fishing effort indices for management in Senegal, it is necessary to account for differences in fishing gears and the non-linear relationship between fishing effort and landings.
Key words: Effects of fishing / Generalized additive model / Sardinella aurita / Sardinella maderensis / Purse seine / Surrounding gillnet / Senegal
© EDP Sciences 2017
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