Sclerochronological records and daily microgrowth of the Peruvian scallop (Argopecten purpuratus, Lamarck, 1819) related to environmental conditions in Paracas Bay, Pisco, Peru

Arturo Aguirre Velarde 1, 2 Jonathan Flye-Sainte-Marie 1 Jaime Mendo 2 Fred Jean 1
1 LEMAR - Laboratoire des Sciences de l'Environnement Marin (LEMAR)
2 Universidad Agraria La Molina (UNALM)
Abstract : We investigated the rhythm of micro-striae formation in the shell of Argopecten purpuratus and environmental influence on micro-growth increments by monitoring growth over a 98-day period between April and July 2007 under bottom and suspended culture (2m above the bottom) rearing conditions. The transfer of individuals to the study site induced the formation of a notable growth mark that allowed us to count the number of micro-striae formed between transfer and sampling dates. Micro-striae counts showed a deposition rate of one stria per day independent of rearing condition. This result allowed us to analyse the relationships between growth increments and environmental conditions. We therefore examined the deviations between observed growth rates and growth rates predicted from a Von Bertalanffy growth function. Cross-correlation analysis revealed significant correlations, without time-lag, between these deviations and both particulate organic carbon and nitrogen concentrations in the bottom treatment. Additionally, we observed negative correlations with temperature and current speed at this depth with time-lags of 1 and 10 days respectively. In the suspended treatment, we observed a significant negative correlation with temperature, only with a 12-day lag-time. Our results show that growth response to environmental variability is not always instantaneous. This delay can be explained by the time delay over which metabolic processes need to be performed (e.g. digestion, use/movements of reserves, growth, reproduction). Further modeling studies could help to better understand these processes.
Keywords : sclerochronology Paracas Bay periodicity shell microgrowth increments Argopecten purpuratus growth
Type de document :
Article dans une revue
Journal of Sea Research, Elsevier, 2015, 99, pp.1-8. 〈10.1016/j.seares.2015.01.002〉
Liste complète des métadonnées

Littérature citée [57 références]  Voir  Masquer  Télécharger
http://hal.univ-brest.fr/hal-01145400
Contributeur : Fred Jean <>
Soumis le : vendredi 24 avril 2015 - 10:27:13
Dernière modification le : jeudi 11 janvier 2018 - 06:22:24
Document(s) archivé(s) le : lundi 14 septembre 2015 - 13:06:42

Fichier

JoSR_AguirreVelarde.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

Collections

UNIV-BREST | IUEM | LEMAR | THESES_IUEM | IRD | CMM

Citation

Arturo Aguirre Velarde, Jonathan Flye-Sainte-Marie, Jaime Mendo, Fred Jean. Sclerochronological records and daily microgrowth of the Peruvian scallop (Argopecten purpuratus, Lamarck, 1819) related to environmental conditions in Paracas Bay, Pisco, Peru. Journal of Sea Research, Elsevier, 2015, 99, pp.1-8. 〈10.1016/j.seares.2015.01.002〉. 〈hal-01145400〉

Exporter

BibTeX TEI DC DCterms EndNote

Partager

Métriques

Consultations de la notice

437

Téléchargements de fichiers

323

Contact

support.ccsd.cnrs.fr
hal.support@ccsd.cnrs.fr
Logo CCSD