Ontogenic migrations of horse mackerel (Trachurus trachurus) along the Iberian coast: implications for stock identification
This paper gives a description of the horse mackerel ontogenic migrations along the Iberian Atlantic coast, based on bottom-trawl survey datacovering the period 1985–2003. The estimates of abundance and mean age from each haul were modelled as a function of year, area and depthand graphs were made s...
| Autores: | , , , |
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| Formato: | artículo |
| Fecha de publicación: | 2008 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/327141 |
| Acesso em linha: | http://hdl.handle.net/10261/327141 |
| Access Level: | acceso abierto |
| Palavra-chave: | Centro Oceanográfico de Santander Pesquerías |
| Resumo: | This paper gives a description of the horse mackerel ontogenic migrations along the Iberian Atlantic coast, based on bottom-trawl survey datacovering the period 1985–2003. The estimates of abundance and mean age from each haul were modelled as a function of year, area and depthand graphs were made showing the proportion of the abundance indices in each area of the coast for each year class. The hypothesis of ontogenicmigrations of horse mackerel along the Iberian Atlantic coast is supported by the results obtained. These migrations seem to have two directions:one along the coast line and another perpendicular to the coast line, through different depths. The fish migrating through the Spanish area, fromBiscaytoNorthGalicia,areprobablycomingfromthestockdistributedfromNorwaythroughthewestoftheBritishIsles,withasouthernboundaryaround Cape Finisterre. Off the Portuguese coast, most year classes seem to recruit to the northwest area, moving progressively to south, and insome cases, after reaching 7 years of age, returning back to northern waters. |
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