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Título: | Changes in Flemish cap cod distribution and its relationship with environmental changes |
Autor: | Cerviño, Santiago CSIC ORCID ; Gil, Julio; Sánchez, Ricardo | Fecha de publicación: | 2005 | Editor: | Northwest Atlantic Fisheries Organization | Citación: | Scientific Council Research (SCR) Document 05/16 (2005) | Serie: | N5097 | Resumen: | Since 1988, when the Flemish Cap survey started, it has been observed a shift of cod population towards shallow waters. Although similar concentrations were related with dense-dependent effects in adjacent areas, it is not clear why in Flemish Cap this shrink happens in the shallow part of the bank. This behaviour could affect the survey catchability and so the trends of the indices of abundance-at-age that are the main information in the assessment of the Flemish Cap cod status. This work has different goals: the first one is to assess the temporal trend in the shoaling movement by age group; the second one is to discuss the possible causes of this behaviour: changes in the population structure, dense-dependent factors or environmental changes, taking into account the physical features of water masses and the circulation over the Cap; by the end is also discussed the assessment implications of this behaviour. | Descripción: | 12 páginas, 9 figuras, 2 tablas.-- Scientific Council Meeting | Versión del editor: | http://archive.nafo.int/open/sc/2005/scr05-016.pdf | URI: | http://hdl.handle.net/10261/84922 | ISSN: | 0256-6915 |
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