Application of a dynamic energy budget model to the Pacific oyster Crassostrea gigas, reared under various environmental conditions
Pouvreau, S., Bourles, Y., Lefebvre, S., Gangnery, A. and Alunno-Bruscia, M. 2006.
Application of a dynamic energy budget model to the Pacific oyster Crassostrea gigas, reared under various environmental conditions.
J. Sea Research, 56: 156 - 167
Abstract
The Dynamic Energy Budget (DEB) model (Kooijman, S.A.L.M.,
1986. Energy budgets can explain body size
relations. J. Theor. Biol. 121, 269 282; Kooijman,
S.A.L.M., 2000. Dynamic Energy and Mass Budgets in Biological
Systems. Cambridge University Press, Cambridge, 424 pp.) has been
adapted to describe the dynamics of growth and reproduction of the
Pacific oyster (Crassostrea gigas) reared in different areas
under conditions ranging from controlled to natural. The values of the
model parameters were estimated from available physiological data and
from published information. The sets of data used to validate the
model came from three long-term growth experiments (>5 months)
performed on Pacific oysters reared under different conditions of food
and environment. The forcing variables were temperature and
phytoplankton densities, the latter being assessed from in vivo
fluorescence and chlorophyll-a concentration measurement. The
successful validation of the model on the three data sets demonstrated
its ability to capture the dynamics of the energy budget in the
Pacific oyster in various environments with the same set of
parameters. The only parameter that varied between simulations was the
half-saturation coefficient (XK), because of a different
diet composition between the three environments under test. The model
successfully reproduced quantitatively the growth and reproduction and
the timing of spawning. These first simulation data led us to propose
several promising perspectives of application for this model in
shellfish ecosystems.