Data/hora: 01/06/2024 18:19:17

Provedor de dados: | 5
País: | France

Título:

Modélisation bioénergétique de la variabilité des traits d’histoire de vie de l’anchois et de la sardine entre le golfe du Lion, le golfe de Gascogne et la Manche

Bioenergetic modeling of the variability of life history traits for anchovy and sardine between the Gulf of Lion, the Bay of Biscay and the English Channel

Autores: | Menu, Clara.
Data: | 2020-09-16
Ano: | 2020
Palavras-chave: | Engraulis encrasicolus; Sardina pilchardus; Théorie Dynamic Energy Budget; Traits d'histoire de vie; Manche; Golfe de Gascogne; Golfe du Lion; Engraulis encrasicolus; Sardina pilchardus; Dynamic Energy Budget theory; Life history traits; English Channel; Bay of Biscay; Gulf of Lion.
Resumo: | Small pelagic fish show a general decrease in size and body condition over the past two decades in the North-East Atlantic. The underlying factors are still not well understood, however recent studies point to a bottom-up control. In order to understand how the environment impacts the main biological functions, i.e. growth, reproduction and maintenance, we adopted a bioenergetic modelling framework based on the Dynamic Energy Budget theory. To improve the robustness of our study, we chose a comparative approach between two species, Engraulis encrasicolus and Sardina pilchardus, both living in three areas, namely the English Channel, the Bay of Biscay and the Gulf of Lion. Our model is calibrated over the Bay of Biscay and then applied to the other areas, over the early 2000s and the mid-2010s. The environment alone, temperature and zooplankton, explained well the observed spatial differences in growth. The Gulf of Lion had a lower fit than the other areas, which might suppose local genetic adaptation. However, we could not highlight any significant trends between 2000 and 2015 in the environmental data we used. Thus, no significant differences have been observed in the model's outputs between the early 2000s and the mid-2010s. This could result either from the lack of interannual variability in our environmental data, and/or from a change occurring on a finer scale, such as a change in the size of zooplankton or a change in the structure of zooplankton's communities.
Tipo: | Text
Idioma: | Francês

Identificador:

https://archimer.ifremer.fr/doc/00667/77900/80092.pdf

https://archimer.ifremer.fr/doc/00667/77900/

Formato: | application/pdf

Fonte:

info:eu-repo/semantics/openAccess

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