Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.12/1362
Título: Influence of starvation on the critical swimming behaviour during ontogenyof the Senegalese sole (Solea senegalensis) and its relationship with RNA/DNA ratios
Autor: Faria, Ana Margarida
Muha, Teja
Morote, Elvira
Chícharo, Maria Alexandra
Palavras-chave: Senegalese sole
Solea senegalensis
Feeding treatment
RNA/DNA ratio
Critical swimming speed
Data: 2011
Editora: Institut de Ciències del Mar de Barcelona
Citação: Scientia Marina, 75 (1), 87-94
Resumo: Food availability can affect larval survival directly through starvation and indirectly through the effects on larval growth rate, swimming performance and vulnerability to predators. In the present study we evaluate the effects of starvation on growth, nutritional condition and swimming behaviour of the Senegalese sole (Solea senegalensis) throughout ontogeny (8 to 14 days after hatching). Biochemical analysis (RNA/DNA ratios) and behavioural experiments (critical swimming speed, Ucrit) were conducted on larvae reared under 3 feeding treatments: fed ad libitum, deprived of food for 48 hours and deprived of food for 96 hours. Growth was significantly affected by feeding treatment, while only slight decreases in RNA/DNA ratio and swimming performance were registered. Late stage larvae of the three feeding treatments had slower critical speeds than the pre-flexion and flexion stages, which is probably related to the benthic lifestyle acquired by the species at the end of the larval period. These physiological and behavioural changes are in accordance with previous results, which show that flatfish larvae are more resistant to starvation than pelagic species and that they become less active later in development.
Peer review: yes
URI: http://hdl.handle.net/10400.12/1362
ISSN: 0214-8358
Aparece nas colecções:UIE-E - Artigos em revistas internacionais

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