Variation in size and growth of the great scallop Pecten maximus along a latitudinal gradient.

Abstract : Understanding the relationship between growth and temperature will aid in the evaluation of thermal stress and threats to ectotherms in the context of anticipated climate changes. Most Pecten maximus scallops living at high latitudes in the northern hemisphere have a larger maximum body size than individuals further south, a common pattern among many ectotherms. We investigated differences in daily shell growth among scallop populations along the Northeast Atlantic coast from Spain to Norway. This study design allowed us to address precisely whether the asymptotic size observed along a latitudinal gradient, mainly defined by a temperature gradient, results from differences in annual or daily growth rates, or a difference in the length of the growing season. We found that low annual growth rates in northern populations are not due to low daily growth values, but to the smaller number of days available each year to achieve growth compared to the south. We documented a decrease in the annual number of growth days with age regardless of latitude. However, despite initially lower annual growth performances in terms of growing season length and growth rate, differences in asymptotic size as a function of latitude resulted from persistent annual growth performances in the north and sharp declines in the south. Our measurements of daily growth rates throughout life in a long-lived ectothermic species provide new insight into spatio-temporal variations in growth dynamics and growing season length that cannot be accounted for by classical growth models that only address asymptotic size and annual growth rate.
Type de document :
Article dans une revue
PLoS ONE, Public Library of Science, 2012, 7 (5), pp.e37717. 〈10.1371/journal.pone.0037717〉
Liste complète des métadonnées

Littérature citée [71 références]  Voir  Masquer  Télécharger

http://hal.univ-brest.fr/hal-00804434
Contributeur : Adminhal Univbrestbu <>
Soumis le : lundi 25 mars 2013 - 15:09:45
Dernière modification le : jeudi 11 janvier 2018 - 06:23:41
Document(s) archivé(s) le : mercredi 26 juin 2013 - 04:02:47

Fichier

journal.pone.chauvaud.0037717....
Fichiers éditeurs autorisés sur une archive ouverte

Identifiants

Citation

Laurent Chauvaud, Yann Patry, Aurélie Jolivet, Emmanuelle Cam, Clement Le Goff, et al.. Variation in size and growth of the great scallop Pecten maximus along a latitudinal gradient.. PLoS ONE, Public Library of Science, 2012, 7 (5), pp.e37717. 〈10.1371/journal.pone.0037717〉. 〈hal-00804434〉

Partager

Métriques

Consultations de la notice

493

Téléchargements de fichiers

132