Multi-scale distribution and dynamics of bivalve larvae in a deep atoll lagoon (Ahe, French Polynesia)

Y. Thomas 1, 2 P. Garen 2 A. Bennett 2 M. Le Pennec 3 Jacques Clavier 4
1 DPFOM LPI - IFREMER
2 COP - Ifremer
3 Université de Polynésie Française
4 LEMAR - Laboratoire des Sciences de l'Environnement Marin (LEMAR)
Abstract : Bivalve larvae and hydrographic parameters were sampled over a range of spatio-temporal scales in a deep atoll lagoon. Bivalve larvae abundances were very high throughout the year: 18,550 m−3 in average. Larvae were (i) concentrated at mid-depth with nocturnal ascent and diurnal descent, (ii) heterogeneously dispersed at the lagoon scale, (iii) subject to day-to-day variation in abundance and (iv) transferred between different parts of the lagoon providing evidence of intra-lagoonal connectivity. The primacy of physical factors was seen on large spatial scale with the diluting effect of water renewal and transfers by hydrodynamics. On smaller spatial scale, the primacy of biological processes was recognised, with larval swimming activity leading to dial vertical migration correlated with food concentration. Variations in larval abundance were driven by bivalve reproductive activity correlated with meteorological conditions (i.e. windy periods). Finally, relationship between bivalve larvae patterns and pearl oyster (Pinctada margaritifera) settlement structuring is discussed.
keyword : Bivalve larvae Distribution patterns Vertical migration Pinctada margaritifera settlement Deep atoll lagoon French Polynesia
Type de document :
Article dans une revue
Marine Pollution Bulletin, Elsevier, 2012, 65 (10-12), pp.453-462. 〈10.1016/j.marpolbul.2011.12.028〉
Liste complète des métadonnées
http://hal.univ-brest.fr/hal-00671058
Contributeur : Adminhal Univbrestbu <>
Soumis le : jeudi 16 février 2012 - 15:29:35
Dernière modification le : jeudi 11 janvier 2018 - 06:22:24

Identifiants

Collections

IUEM | LEMAR | UNIV-BREST | THESES_IUEM | CMM

Citation

Y. Thomas, P. Garen, A. Bennett, M. Le Pennec, Jacques Clavier. Multi-scale distribution and dynamics of bivalve larvae in a deep atoll lagoon (Ahe, French Polynesia). Marine Pollution Bulletin, Elsevier, 2012, 65 (10-12), pp.453-462. 〈10.1016/j.marpolbul.2011.12.028〉. 〈hal-00671058〉

Exporter

BibTeX TEI DC DCterms EndNote

Partager

Métriques

Consultations de la notice

134

Contact

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