Modelling growth and reproduction of the Pacific oyster Crassostrea gigas: Advances in the oyster-DEB model through application to a coastal pond
|Author(s)||Bourles Yves1, 2, Alunno-Bruscia Marianne1, 2, Pouvreau Stephane1, Tollu Guillaume2, Leguay Didier2, 3, Arnaud Christophe2, 3, Goulletquer Philippe4, Kooijman S5|
|Affiliation(s)||1 : IFREMER, Stn Expt Argenton, F-29840 Argenton En Landunvez, France.
2 : CRELA, UMR 6217, F-17137 Lhoumeau, France.
3 : UMS ELA, F-17137 Lhoumeau, France.
4 : Ifremer Nantes, F-44311 Nantes 03, France.
5 : Vrije Univ Amsterdam, Fac Earth & Life Sci, Dept Theoret Biol, NL-1081 HV Amsterdam, Netherlands.
|Source||Journal of Sea Research (1385-1101) (Elsevier), 2009-10 , Vol. 62 , N. 2-3 , P. 62-71|
|WOS© Times Cited||62|
|Keyword(s)||Coastal Environment, Temperature effect, Food Quantifiers, Crassostrea gigas, Bivalves, Modelling, DEB theory|
|Abstract||A bio-energetic model, based on the DEB theory exists for the Pacific oyster Crassostrea gigas. Pouvreau et al. [Pouvreau, S., Bourles, Y., Lefebvre, S., Gangnery, A., Alunno-Bruscia, M., 2006. Application of a dynamic energy budget model to the Pacific oyster, C. gigas, reared under various environmental conditions. J. Sea Res. 56, 156167.] successfully applied this model to oysters reared in three environments with no tide and low turbidity, using chlorophyll a concentration as food quantifier. However, the robustness of the oyster-DEB model needs to be validated in varying environments where different food quantifiers reflect the food available for oysters, as is the case in estuaries and most coastal ecosystems. We therefore tested the oyster-DEB model on C. gigas reared in an Atlantic coastal pond from January 2006 to January 2007. The model relies on two forcing variables: seawater temperature and food density monitored through various food quantifiers. Based on the high temperature range measured in this oyster pond (330 °C), new boundary values of the temperature tolerance range were estimated both for ingestion and respiration rates. Several food quantifiers were then tested to select the most suitable for explaining the observed growth and reproduction of C. gigas reared in an oyster pond. These were: particulate organic matter and carbon, chlorophyll a concentration and phytoplankton enumeration (expressed in cell number per litre or in cumulative cell biovolume). We conclude that when phytoplankton enumeration was used as food quantifier, the new version of oyster-DEB model presented here reproduced the growth and reproduction of C. gigas very accurately. The next step will be to validate the model under contrasting coastal environmental conditions so as to confirm the accuracy of phytoplankton enumeration as a way of representing the available food that sustains oyster growth.|