FN Archimer Export Format
PT J
TI Gametogenesis, reproductive investment, and spawning behavior of the Pacific giant oyster Crassostrea gigas: evidence of an environment-dependent strategy
BT 
AF ENRIQUEZ-DIAZ, M.
   POUVREAU, Stephane
   CHAVEZ-VILLALBA, J.
   LE PENNEC, M.
AS 1:1;2:2;3:3;4:4;
FF 1:;2:PDG-DOP-DCB-PFOM-PI;3:;4:;
C1 CINVESTAV IPN, Lab Biol & Cult Moluscos, Merida 97310, Yucatan, Mexico.
   IFREMER, Lab Physiol Mollusques Marins, F-29840 Presquile Du Vivier, Argenton En Lan, France.
   CIBNOR, Unidad Sonora, Guaymas 85454, Sonora, Mexico.
   Univ Polynesie Francaise, Faaa 98702, Tahiti, Fr Polynesia.
C2 CINVESTAV IPN, MEXICO
   IFREMER, FRANCE
   CIBNOR, MEXICO
   UNIV POLYNESIE FRANCAISE, FRANCE
SI ARGENTON
SE PDG-DOP-DCB-PFOM-PI
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
   copubli-sud
IF 0.753
TC 68
UR https://archimer.ifremer.fr/doc/2009/publication-7300.pdf
LA English
DT Article
DE ;Stereology;Reproductive investment;Pacific oysters;Image analysis;Gametogenesis;Crassostrea gigas
AB The progress of gametogenesis was studied in oysters Crassostrea gigas having the same origin (Tremblade), but cultured during 1 year in two distinctive French marine areas, the Baie des Veys and Marennes-Ol,ron. We assessed seasonal changes in the reproduction cycle on the basis of stereological techniques to estimate reproductive investment and measurement of gonad evolution area by quantitative histology. From a qualitative point of view, both oyster groups presented typical reproductive stages, but showed differential timing, in particular during the sequence of spawning and duration of the re-absorption stage. Oysters in Baie des Veys had a single partial spawning in August and a re-absorption stage that extended until winter. Oysters in Merennes-Ol,ron had a partial spawning in July and massive release of gametes during August. Spawnings in both the areas were related to maximum temperature (19A degrees C). The quantitative analysis showed, on an annual basis, a higher reproductive investment by oysters from Baie des Veys, 86% against 53% in the other group. Larger gonads, higher gamete production, and more intensive spawning were the characteristics of oysters in Baie des Veys. Recently, the reproduction pattern and investment has been related with summer mortalities; therefore, a quantitative understanding of reproductive processes becomes necessary for C. gigas. Environmental conditions at each site may explain differences in the progress and intensity of gametogenesis. While temperature regulated the time and speed of gametogenesis, results suggest that the intensity was influenced by the quantity of available food but may need further research. However, nutrient recycling from unreleased gametes in the gonads of oysters from Baie des Vey is a factor to be considered in the results of this study.
PY 2009
PD OCT
SO Aquaculture International
SN 0967-6120
PU Springer
VL 17
IS 5
UT 000270642800008
BP 491
EP 506
DI 10.1007/s10499-008-9219-1
ID 7300
ER

EF