Data/hora: 10/06/2024 12:47:04

Provedor de dados: | 5
País: | France
Título: | Caractérisation, variabilité et héritabilité des traits de personnalité chez les téléostéens. Cas du bar européen, Dicentrarchus labrax.
Autores: | Ferrari, Sebastien.
Data: | 2014-12-18
Ano: | 2014
Resumo: | This thesis is organized in three principal parts. The first part of this thesis highlights the existence of coping style in seabass, revealing links between behavioral and physiological responses following a stress. The proactive individuals showed a weaker activation of the HPI axis, resulting in a lesser increase of plasmatic cortisol levels after a stress compared to reactive fish. However, the links between personality traits and activation of the dopaminergic and serotonergic systems could not be clearly demonstrated. The individual tests appeared discriminating personality, but did not allow observing coherent responses in time likely because of the stressing character of the isolated situation in this social species. The use of tests in group appeared better adapted and made it possible to characterize a significant number of individual, a necessary step when one aims at characterizing the genetic variability of the behavioral traits. Finally, variability observed underlined important adaptation capacities of this species. The second part demonstrated the existence of links between personality traits and feeding strategies. The analysis of the social structure highlighted a cooperative strategy concerning the acquisition of food with a specialization of certain individuals in the group. Lastly, the third part showed genetic correlations between coping styles, personality traits and phenotypes, letting foresee a possible selection of the personality traits in a production context. The level of domestication proved to have an influence on the links between personality and growth potential. The use of all these coping style and personality traits could be an additional tool to improve the process of domestication, allowing for example the selection of divergent coping styles which could correspond to individuals more resistant to diseases, or better adapted to their environment.
Tipo: | Text
Idioma: | Francês

Identificador:

http://archimer.ifremer.fr/doc/00266/37738/35754.pdf

http://archimer.ifremer.fr/doc/00266/37738/

Editor: | Université de La Rochelle
Formato: | application/pdf

Fonte:

2014 Université de La Rochelle

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