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Regulación de la ingesta, el crecimiento y el comportamiento por ghrelina en ejemplares salvajes de trucha marrón (Salmo trutta)

Poster (konferens)
Författare Ana Belén Tinoco
Elisabeth Jönsson Bergman
Joacim Näslund
María Jesús Delgado
Nuria de Pedro
Jörgen I Johnsson
Publicerad i Libro de actas: XIII Congreso Nacional Acuicultura, Barcelona 2011
Publiceringsår 2011
Publicerad vid Zoologiska institutionen, ekologisk zoologi
Zoologiska institutionen, zoofysiologi
Språk es
Ämnesord Ghrelin, Behaviour, Hormone, Fish, Trout, Salmonid
Ämneskategorier Etologi och beteendeekologi, Biologiska vetenskaper

Sammanfattning

Studies in teleosts reveal that several key functions of ghrelin have been conserved during vertebrate evolution. However, results in rainbow trout (Oncorhynchus mykiss) showed different effects of this hormone. Our aim was to clarify if these results are representative for salmonids, or reflect domestication effects, since rainbow trout has been artificially selected for rapid growth. Thus, the long-term effect of ghrelin implants in wild brown trout (S. trutta) parr was studied. Ghrelin significantly increased food intake and specific growth rate. Moreover, an increase tendency was observed in swim activity and aggressive behavior in ghrelin treated fish. Therefore, ghrelin seems to have the same functions in wild salmonids as in other fish, and the altered ghrelin actions in rainbow trout are likely due to domestication effects, although species-specific effects cannot be ruled out. Additional studies are necessary to clarify if ghrelin affect swim activity and aggressive behavior in salmonids.

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