Data/hora: 06/06/2024 15:30:34

Provedor de dados: | 5
País: | France
Título: | Influence des variations des facteurs environnementaux sur la croissance de poissons de l'Atlantique
Autores: | Barrios, Alexander.
Data: | 2017-02-21
Ano: | 2017
Palavras-chave: | Croissance; Gadidés; Clupéidés; Atlantique; Otolithe; Modèle de von Bertalanffy; Modèles à effets mixtes.; Growth; Gadides; Clupeids; Atlantic; Otolith; Von Bertalanffy growth model; Mixed effects models.
Resumo: | The impact of biotic factors such as density-dependent processes, recruitment, total mortality, and abiotic factors such as upwelling intensity, temperature and chlorophyll a concentration on the variation of growth parameters of pelagic and demersal fish were studied during the periods 1990 - 2008 (pelagic) and 1971 - 2015 (demersal). Life history parameters vary according to the species and from one region to another and over time within a given area because of their plasticity and the high fishing pressure. Interspecies and inter-regional comparison were carried out. Non-linear mixed effects models were used on different fish species of the Atlantic Ocean in order to estimate the growth parameters at the individual and population levels. Variations in growth parameters of selected species were correlated with biotic and abiotic factors. Selected species (Sardinella aurita, round sardinella, Xenomelaniris brasiliensis, tinicalo, Merlangus merlangus, whiting, Melanogrammus aeglefinus, haddock and Solea solea, sole) showed different responses to biotic and abiotic factors. Regardind the spatial component for whiting and haddock, the variation of growth parameters was affected by latitude and temperature. Concerning the temporal component, whiting was affected by temperature and density-dependent processes. There was also an interest to know if the morphometric variables and the diameter of the otolith of Atherinella brasilensis were good growth indicators. Among the morphometric parameters examined, the standard length-Age relationship showed the best fit (r2 = 0.90), followed by the otolith diameter (r2 = 0.85). Finally, the variation in individual growth whiting in terms of region and sex was also studied. Differences were found between sexes and regions.
Tipo: | Text
Idioma: | Francês

Identificador:

http://archimer.ifremer.fr/doc/00419/53026/53960.pdf

http://archimer.ifremer.fr/doc/00419/53026/

Editor: | Uniivesité Breatgne Loire, Agrocampus Ouest
Formato: | application/pdf

Fonte:

2017 UBL

info:eu-repo/semantics/openAccess

restricted use