Kantoussan J., Ecoutin Jean-Marc, Fontenelle G., Tito de Morais Luis, Laë Raymond. (2014). Catch per Unit Effort and yields as indicators of exploited fish communities : application to two West African reservoirs. Lakes and Reservoirs : Research and Management, 19 (2), p. 86-97. ISSN 1440-1770.
Titre du document
Catch per Unit Effort and yields as indicators of exploited fish communities : application to two West African reservoirs
Année de publication
2014
Type de document
Article
Auteurs
Kantoussan J., Ecoutin Jean-Marc, Fontenelle G., Tito de Morais Luis, Laë Raymond
Source
Lakes and Reservoirs : Research and Management, 2014,
19 (2), p. 86-97 ISSN 1440-1770
Two indicators of fish exploitation, catch per unit effort (CPUE) and yield per unit area, were used with surveys of small-scale fishery landings to compare two African reservoirs that differ in their level of fish exploitation, being high for Selingue Reservoir and low for Manantali Reservoir, both located in West Africa. The heavy exploitation in Selingue Reservoir induced a decline in catches per fishing trip (9.5 kg trip−1), whereas the catch remained high at Manantali Reservoir (17.0 kg trip−1). Moreover, the annual fish yield per unit area was lower for Manantali Reservoir (19 kg ha−1) than for Selingue Reservoir (79 kg ha−1). There was no relationship between the Morphoedaphic Index and catches for the two reservoirs. Rather, only the fishing effort and annual water-level variations defined the reservoir fish yields. Based on the results of the present study, it appears that CPUE and fish yield per unit area represent simple and robust indicators for describing the impacts of fishing intensity in aquatic ecosystems.
Plan de classement
Stocks [040PECHE03]
Descripteurs
PECHE LACUSTRE ; EFFORT DE PECHE ; GESTION DES PECHES ; LAC ARTIFICIEL ; PROTECTION DE L'ECOSYSTEME ; IMPACT SUR L'ENVIRONNEMENT
