FN Archimer Export Format
PT J
TI Phytoplankton composition and selective feeding of the pearl oyster Pinctada margaritifera in the Takapoto lagoon (Tuamotu Archipelago, French Polynesia): in situ study using optical microscopy and HPLC pigment analysis
BT 
AF LORET, P
   PASTOUREAUD, Annie
   BACHER, Cedric
   DELESALLE, B
AS 1:;2:;3:;4:;
FF 1:;2:PDG-DOP-LER-LERLR;3:PDG-DOP-DCB-DYNECO;4:;
C1 Univ Perpignan, URA CNRS 1453, EPHE, F-66860 Perpignan, France.
   CREMA, F-17137 Houmeau, France.
C2 UNIV PERPIGNAN, FRANCE
   IFREMER, FRANCE
SI SETE
   BREST
SE PDG-DOP-LER-LERLR
   PDG-DOP-DCB-DYNECO
IN WOS Ifremer jusqu'en 2018
   copubli-univ-france
IF 1.928
TC 41
UR https://archimer.ifremer.fr/doc/00000/10992/7606.pdf
LA English
DT Article
DE ;pearl oyster Pinctada margaritifera;selective feeding;natural diet;phytoplankton pigments;coral reefs;French Polynesia
AB The in situ diet of the pearl oyster Pinctada margarifera was determined in the lagoon of Takapoto Atoll by comparing the phytoplankton composition of water and bivalve gut contents using 2 different methods, optical microscopy and HPLC pigment analysis. In order to evaluate the available food resources for pearl oysters in the water column, a new method for estimating the pigment/chlorophyll a (chl a) ratio (based on an inverse analysis) was developed which allowed us to determine the contribution of the main phytoplanktonic groups in terms of chi a. In the water, picocyanobacteria and nanoflagellates predominated, the latter being mainly chlorophytes and prymnesiophytes. Comparisons between the results obtained by the 2 methods of investigation indicated that most of the dinoflagellates are unpigmented and, therefore, heterotrophic. An examination of the gut contents showed that picocyanobacteria were only weakly ingested by the oyster and, thus, nanoflagellates constituted the main food resource. Cryptophytes, although poorly represented in the water, were preferentially ingested. Chlorophytes were inefficiently digested since they were found alive and motile in the faeces of the oyster. The ecological implications of this feeding behaviour are discussed.
PY 2000
SO Marine Ecology Progress Series
SN 0171-8630
PU Inter-research
VL 199
UT 000088434300005
BP 55
EP 67
DI 10.3354/meps199055
ID 10992
ER

EF