Data/hora: 06/06/2024 05:31:56

Provedor de dados: 	5	
País: 	France	
Título: 	Une approche bioénergétique pour la comparaison des traits d'histoire de vie de l'anchois et de la sardine du golfe de Gascogne

A bioenergetics approach to compare life history traits of anchovy and sardine in the Bay of Biscay	
Autores: 	Gatti, Paul.	
Data: 	2016-12-16	
Ano: 	2016	
Palavras-chave: 	Bioénergétique; Modélisation individu centrée; Cycle de vie; Traits d'histoire de vie; Petits poissons pélagiques; Bioenergetics; Individual based model; Life cycle; Life history traits; Small pelagic fishes.	
Resumo: 	Anchovy and sardine belong to the guild of small pelagic fish and are of peculiar importance at the scales of ecosystems and fisheries. Both species are worldwide spread and commonly occur in the same ecosystems. They display large interannual variability in biomass with markedly different trends or even asynchronous. A growing literature suggests that those dynamics are due to respective sensibility to environmental conditions driven by different biological traits. A priori both species are very similar but show slightly distinct feeding behaviours and reproductive strategies. Understanding divergences in both species biology and life history strategies is thus crucial to understand and predict past and future dynamics of these stocks. The aim of this PHD is to assess how both species diverge in terms of biological and life history traits on a physiological basis. Owing to the complexity of biological traits, potential interactions among these traits and ontogenetic evolutions, to answer this question an integrative approach based on a bioenergetics model of the whole life cycle is requested. First the study focus on a condition index: the energy density (energy content per unit of mass). Energy density integrates historic of numerous physiological processes, both gain from food and diverse metabolic expenses. This analysis shows effects on the bioenergetics cycle of the fish, namely species, size, season and geographic area. Linked with bioenergetics data, a full life cycle model has been parametrised for both species in the Bay of Biscay, in order to get an integrative, predictive and exploratory tool. This model is based on the “Dynamic Energy Budget” theory. This theory aims at predicting the life cycle of an organism, using environmental forcing, by simulating energy fluxes inside the organism. This modelling approach underlines the particularly significant feature of reproductive strategies on the bioenergetics annual cycle of both species.	
Tipo: 	Text	
Idioma: 	Francês	
Identificador: 	https://archimer.ifremer.fr/doc/00498/60917/64277.pdf

https://archimer.ifremer.fr/doc/00498/60917/	
Editor: 	Université de Rennes	
Formato: 	application/pdf	
Fonte: 	info:eu-repo/semantics/openAccess

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