Tropicultura (Jan 2016)
Mode d'exploitation et durabilité de la pêche de Oreochromis niloticus (Linnaeus, 1758), Clarias gariepinus (Burchell, 1822) et Gymnarchus niloticus (Cuvier, 1829) dans le lac de barrage du Sourou (Burkina Faso)
Abstract
Mode of Operation and Sustainability of Oreochromis niloticus (Linnaeus, 1758), Clarias gariepinus (Burchell, 1822) and Gymnarchus niloticus (Cuvier, 1829) Fisheries in the Sourou Dam Lake (Burkina Faso). This research on fishery exploitation in the Sourou dam raises the issue of sustainable management of common property. The central hypothesis is that the effectiveness of co-management for sustainable fishing practices is related to the level of ownership of that management and actors' games by fishing communities. In analysing co-management induced effects on fishing practices and exploitation of C. gariepinus, O. niloticus and G. niloticus species, related to its implementation in Sourou fishery, a research methodology that combines qualitative and quantitative methods is used. Socio-economic surveys were conducted with 30 fishermen in three villages bordering the fishery. Biological surveys were also conducted with catches of C. gariepinus, O. niloticus and G. niloticus of these fishermen,. The results indicate a weak ownership of the co-management model by fishermen and the strategies of actors that consist to minimize the costs of the sustainable management of fisheries resources at individual level. Indeed, even when informed of fisheries regulations, fishermen use prohibited fishing equipment (54.1% of the catches of studied species), and fishi illegally (43.3% of the fishermen). Furthermore, significant proportions of each studied species are captured before their first maturity sizes (52.2% of C. gariepinus, 15.8% of G. niloticus and 14.3% of O. niloticus). So, the central hypothesis is verified because the weak ownership of co-management by fishing communities and the actors' strategies do not encourage them to develop a responsible behavior for sustainable fishing.
