Have the Atlantic bluefin tuna management measures influenced the age composition of the Bay of Biscay bait boat catches?
The implementation of regulatory measures of the Atlantic bluefin tuna Recovery Plan in 2007 has produced changes in the fishing strategy of the bait boat fishery in the Bay of Biscay due to market conditions. To maintain bluefin tuna price and to avoid a market boycott of small specimens, fishermen...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2013 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/326754 |
| Acceso en línea: | http://hdl.handle.net/10261/326754 |
| Access Level: | acceso abierto |
| Palabra clave: | Pesquerías Centro Oceanográfico de Santander |
| Sumario: | The implementation of regulatory measures of the Atlantic bluefin tuna Recovery Plan in 2007 has produced changes in the fishing strategy of the bait boat fishery in the Bay of Biscay due to market conditions. To maintain bluefin tuna price and to avoid a market boycott of small specimens, fishermen's cooperatives of the main ports redistributed bluefin catches throughout the fishing season by establishing vessel maximum quotas by time period and size of the tuna and by port maximum daily sale quotas. In order to see whether these limitations are affecting catch composition, we analysed its evolution by commercial category and by catch at age from 1985 to the present. Our results showed that the catch at age since the implementation of regulatory measures of the Recovery Plan in 2007 comprised older specimens than in the previous time period. Strong year-class signal from 1994 and 2003 cohorts can be observed in the data series but this last year-class signal does not explain the increasing trend in the abundance of older fish in the last five year catches. |
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