GAMAIN, Perrine; ROMERO-RAMIREZ, Alicia; GONZALEZ, Patrice; MAZZELLA, Nicolas; GOURVES, Pierre-Yves; COMPAN, Clémence; MORIN, Benedicte; CACHOT, Jérôme

doi:10.1007/s11356-019-04156-8

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GAMAIN, Perrine
Environnements et Paléoenvironnements OCéaniques [EPOC]

ROMERO-RAMIREZ, Alicia
Environnements et Paléoenvironnements OCéaniques [EPOC]

GONZALEZ, Patrice

Environnements et Paléoenvironnements OCéaniques [EPOC]

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Article de revue

Ce document a été publié dans

Environmental Science and Pollution Research. 2020, vol. 27, n° 4, p. 3675-3685

Résumé en anglais

This study describes an image analysis method that has been used to analyze the swimming behavior of native oyster D-larvae (Crassostrea gigas) from the Arcachon Bay (SW, France). In a second time, this study evaluated the impact of copper and S-metolachlor pollutants on D-larvae swimming activity and the possible relationship between developmental malformations and abnormal swimming behavior. Analyses in wild and cultivated oyster D-larvae were investigated during two breeding-seasons (2014 and 2015) at different sampling sites and dates. In controlled conditions, the average speed of larvae was 144 µm s '1 and the maximum speed was 297 µm s '1 while the trajectory is mainly rectilinear. In the presence of environmental concentration of copper or S-metolachlor, no significant difference in maximum or average larval speed was observed compared to the control condition but the percentage of circular trajectory increased significantly while the rectilinear swimming larvae significantly declined. The current study demonstrates that rectilinear trajectories are positively correlated to normal larvae while larvae with shell anomalies are positively correlated to circular trajectories. This abnormal behavior could affect the survival and spread of larvae, and consequently, the recruitment and colonization of new habitats. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.< Réduire

Mots clés

HUITRE

CRASSOSTREA GIGAS

Mots clés en anglais

early life stage

Image analysis

speed

trajectory

malformations

copper

Smetolachlor

swimming behavior