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Provedor de dados:  ArchiMer
País:  France
Título:  Spatial variation in growth, maturation schedules and reproductive investment of female sole Solea solea in the Northeast Atlantic
Autores:  Mollet, Fabian M.
Engelhard, Georg
Vainikka, Anssi
Laugen, Ane
Rijnsdorp, Adriaan D.
Ernande, Bruno
Data:  2013-11
Ano:  2013
Palavras-chave:  Countergradient variation
Phenotypic plasticity
Growth
Maturation reaction norm
Temperature
Mortality-induced evolution
Resumo:  Latitudinal variation in life-history traits is often explained by phenotypically plastic responses or local adaptations to different thermal regimes. We compared growth, maturation schedules and reproductive investment of female sole Solea solea between 8 populations, covering much of the species' distribution in northern Europe, with respect to thermal gradients. An energy allocation model was fitted to size–age data, and probabilistic maturation reaction norms were estimated from size–age–maturity data. We found that northern populations from colder environments had higher rates of energy acquisition and reproductive investment, an intrinsic tendency to mature earlier, and had smaller asymptotic sizes than southern populations from warmer environments. Consequently, growth rate was higher before maturation but lower after maturation in the north compared to the south. This is opposite to Bergmann's rule according to which slower growth, delayed maturation and larger asymptotic sizes are usually observed at lower temperatures. The observed patterns could indicate strong countergradient thermal adaptation for rapid growth and development aswell as sustained fecundity in the north, or indicate a response to other selection pressures correlated with the thermal gradient. Potentially higher mortality in northern populations during cold winters might be one of the key drivers of the observed geographical variation in growth and maturation of sole.
Tipo:  Text
Idioma:  Inglês
Identificador:  http://archimer.ifremer.fr/doc/00124/23523/21360.pdf

DOI:10.1016/j.seares.2012.12.005
Editor:  Elsevier Science Bv
Relação:  http://archimer.ifremer.fr/doc/00124/23523/
Formato:  application/pdf
Fonte:  Journal Of Sea Research (1385-1101) (Elsevier Science Bv), 2013-11 , Vol. 84 , P. 109-121
Direitos:  2012 Published by Elsevier B.V.
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