Typology of small-scale fishing gear impact on seabirds in the Senegalo-Mauritanian Upwelling [résumé]

• Main Authors: Thiour, D., Diop, M., Brehmer, Patrice, Diouf, M., Dossa, J.
• Other Authors: Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Brehmer, Patrice (ed.), Ba, B. (ed.), Kraus, G. (ed.)
• Format: Conference Object
• Language: English
• Published: HAL CCSD 2016
• Subjects: SENEGAL; MAURITANIE; ATLANTIQUE; [SDV.SA.STP]Life Sciences [q-bio]/Agricultural sciences/Sciences and technics of fishery; [SDV.BA]Life Sciences [q-bio]/Animal biology; [SDV.EE]Life Sciences [q-bio]/Ecology; environment; The Landing; Pomarine Skua; Stercorarius pomarinus
• Online Access: https://hal.science/hal-04372725

ICAWA : International Conference AWA, Dakar, SEN, 13-/12/2016 - 15/12/2016 Situated in West Africa, Senegal has 700 km of coastline characterized by a large Eastern Boundary Upwelling Ecosystem providing significant biological productivity. Small-scale fishing plays an important role in the national economy of Senegal. The fishing gear used has a potentially direct or indirect impact on seabirds. To examine and evaluate this impact surveys were conducted on eight landing sites. Field surveys (2-3 days) took place in 2015 based on a standardized interview with questionnaire conducted with 225 small-scale fishermen. The results obtained indicate that longlines are the fishing gear that causes the highest rate of annual accidental seabird catch (63 % of seabird caugth (n = 702)), followed by handlines (16%) and anchored gillnet (6 %). The Pomarine Skua (Stercorarius pomarinus) is the most captured bird annually (29 % of total captured birds), closely followed by the Cory's Shearwater (Calonectris diomedea) (28 % of captured birds) and the Northern Gannet (Morus bassanus) (13 % of captured birds). The village of Yoff is the landing site which has the highest rate of annual seabird catch with 39% of the total catch indicated, followed by Kayar with 19 % and Saint Louis with 14%, both situated on the Grande Côte. Further studies should be conducted in the entire Senegalese-Mauritanian coast in particular in the northern part of Senegal, to better evaluate the annual catch of seabirds. A great collaboration should also be established with longliners, handliners and anchored gillnet fishers to better quantify incidental catch of seabirds by the artisanal fishing gear and set up mitigation actions.