Influence of phytoplankton diversity and community structure on oyster reproduction (Arcachon Bay, France)
|Author(s)||Gonzales Arriagada1, Bernard Ismael2, Maurer Daniele3, Auby Isabelle3, Gasmi Sonia1, Pouvreau Stephane4, David Valerie1|
|Affiliation(s)||1 : Université Bordeaux, UMR EPOC, France
2 : Eureka modélisation, France
3 : Ifremer, LER Arcachon, France
4 : Ifremer, PFOM, France
|Meeting||ISOBAY 14 - XIV International Symposium on Oceanography of the Bay of Biscay, 11-13 June 2014, Bordeaux, France|
|Abstract||Arcachon Bay is one of the most important spat-supplying area for the French oyster
production. During the last 16 years, the local economic activity of spat production has been
threatened recurrently by a high interannual variability of seed harvesting. This threatened spat
production was attributed to reproductive problems highlighted by both a delay in oyster
spawning and a decrease of small larvae abundances since 1995.
Recent works showed that these two reproduction indices seem closely related to climate
change that might controls the phytoplankton communities of the Bay. Food availability in term
of quantity and quality appears thus as a serious track to understand the reproductive problems
of oyster in the Arcachon Bay.
The aim of this work was thus to understand how phytoplankton might control the
growth and reproductive effort of oysters in Arcachon Bay through microphytoplankton
diversity and composition.