The potential impact of marine protected areas on the Senegalese sardinella fishery

Type Article
Date 2019-03
Language English
Author(s) Ba Aliou1, 4, 5, Chaboud Christian2, Schmidt Joern3, Diouf Malick4, Fall Massal5, Deme Moustapha5, Brehmer Patrice1, 5
Affiliation(s) 1 : Inst Rech Dev France IRD, UMR Lemar, BP 1386, Dakar, Senegal.
2 : Inst Rech Dev France IRD, UMR Marbec, Sete, Senegal.
3 : Univ Kiel CAU, Dept Econ, Wilhelm Seelig Pl 1, D-24118 Kiel, Germany.
4 : UCAD, Inst Univ Peche & Aquaculture, UCAD 2,BP 45784, Dakar, Senegal.
5 : ISRA, CRODT, Ctr PRH, BP 2241, Dakar, Senegal.
Source Ocean & Coastal Management (0964-5691) (Elsevier Sci Ltd), 2019-03 , Vol. 169 , P. 239-246
DOI 10.1016/j.ocecoaman.2018.12.020
WOS© Times Cited 3
Keyword(s) Small scale fisheries, MPA, Bioeconomic modeling, Fishing capacity, Fishery management, Sardinella aurita, Sardinella maderensis, Aichi targets, West Africa

In the early 2000s, Senegal set up several Marine Protected Areas (MPAs) along its coastal zone with the purpose of biodiversity conservation and to support sustainable management of fisheries. However, the impact of MPAs may vary according to the type of fisheries. In Senegal, the sardinella fishery accounts for 70% of total catches. This fishery is of crucial importance for national food security and employment. Given this importance, it is necessary to evaluate the impact of MPAs, often being considered as a tool for fisheries management. An analytical, dynamic and spatial bio-economic model of sardinella fishery, considering fish and fisher migration, has been developed and scenarios over forty years have been analyzed. The results show that the fishery is economically overexploited and that Senegal could lose about 11.6 billion CFA over forty years of exploitation, i.e. 290 million CFA per year. To achieve an optimal level of exploitation, it would be necessary to halve the current fishing capacity. Implementing MPAs for 10, 20 and 30% of the Senegalese exclusive economic zone lead to slight increases in biomass (1%) and rent (5-11%). In addition, spatio-temporal closures can lead to increased exploitation in unclosed areas, due to the absence of enforcement. Achieving target 11 of the Aichi Convention, i.e., 10% of coastal and marine areas protected per country, will have a reserve effect on the resource but also only lead to weak improvements in economic indicators for the Senegalese fishery. Finally, because the sardinella resource is shared among many countries of the Sub-Regional Fisheries Commission (SRFC), a sub-regional cooperation is necessary for a sustainable management.

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