Data/hora: 06/06/2024 09:30:18

Provedor de dados: | 5
País: | France
Título: | Analyse des campagnes SOLPER - 2005 à 2012
Autores: | Leaute, Jean-pierre; Aubert, Fabien; Lepareur, Fanny; Coupeau, Yann; Boiron-leroy, Anne.
Data: | 2015-01
Ano: | 2015
Palavras-chave: | Sole commune; Solea solea; Chalut à perche; Abondance; Pertuis charentais; Common sole; Solea solea; Beam trawl; Abundance; Pertuis charentais.
Resumo: | A large number of studies on common sole have already been done for years by many research laboratories. This study sought to make a focus on a major nursery on the Atlantic coast, the Pertuis charentais, through the results of eight annual surveys (2005-2012) in late summer (SOLe PERtuis) targeting sole juveniles with a small beam trawl until subtidal zone (&lt;1.50 m). Some of the results obtained in this report confirm previous studies, such as, among others, that more than 80% YOY (G0) occupy muddy or sandy mud bottom at a depth less than 5 m, or that there is a relative correlation between large rainfall in the spring, river flows and abundance of G0 in nursery.   However in the Pertuis Breton this correlation is little expressed by an extension of the colonized area by G0, but rather by a strong increase in density in coastal and subtidal zone, zone usually little explored, due to the shallow depth, not accessible to fishing vessels. The small trawl mesh (8 mm stretched) and access to these shallow sectors have sometimes permitted the capture of a significant proportion of juveniles that had an average size below the selectivity of trawls used in other surveys where this abundance were able to pass virtually unnoticed. Moreover, the abundance of juvenile group 0 in 2007 was followed the next two years for groups 1 and 2; this has help predict the arrival of this large cohort available to the fishery after recruitment. It was also observed when the G0 were very small in size, a compensation phenomenon of size between the first and second year of life, which allowed the G1 to reach a ‘normal’ size. Finally, assuming a correlation between high abundance / density and a G0 low condition index, there seem exist high abundance cycle opportunities of for many consecutives years but adverse summer environmental conditions reduce the potential annual cohort by a large mortality. Keys words : Common sole, Solea solea, beam trawl, abundance, Pertuis charentais
Tipo: | Text
Idioma: | Francês

Identificador:

http://archimer.ifremer.fr/doc/00422/53357/54196.pdf

http://archimer.ifremer.fr/doc/00422/53357/

Formato: | application/pdf

Fonte:

info:eu-repo/semantics/openAccess

restricted use