FN Archimer Export Format
PT J
TI Integrating the effects of salinity on the physiology of the eastern oyster, Crassostrea virginica, in the northern Gulf of Mexico through a Dynamic Energy Budget model
BT 
AF LAVAUD, Romain
   LA PEYRE, Megan K.
   CASAS, Sandra M.
   BACHER, Cedric
   LA PEYRE, Jerome F.
AS 1:1,2;2:3;3:1;4:4;5:1;
FF 1:;2:;3:;4:PDG-ODE-DYNECO;5:;
C1 Louisiana State Univ, Ctr Agr, Sch Renewable Nat Resources, Baton Rouge, LA 70803 USA.
   Gulf Fisheries Ctr, Dept Fisheries & Oceans Canada, Moncton, NB, Canada.
   Louisiana State Univ, Ctr Agr, US Geol Survey, Louisiana Cooperat Fish & Wildlife Res Unit,Sch R, Baton Rouge, LA 70803 USA.
   IFREMER, Ctr Bretagne, Dynam Coastal Ecosyst Res Unit, Plouzane, France.
C2 UNIV LOUISIANA STATE, USA
   MPO, CANADA
   UNIV LOUISIANA STATE, USA
   IFREMER, FRANCE
SI BREST
SE PDG-ODE-DYNECO
IN WOS Ifremer jusqu'en 2018
   copubli-int-hors-europe
IF 2.507
TC 41
UR https://archimer.ifremer.fr/doc/00400/51137/53773.pdf
LA English
DT Article
DE ;DEB theory;Bioenergetics;Filtration;Maintenance;Growth;Estuary;Louisiana
AB We present a Dynamic Energy Budget (DEB) model for the eastern oyster, Crassostrea virginica, which enables the inclusion of salinity as a third environmental variable, on top of the standard foodr and temperature variables. Salinity changes have various effects on the physiology of oysters, potentially altering filtration and respiration rates, and ultimately impacting growth, reproduction and mortality. We tested different hypotheses as to how to include these effects in a DEB model for C. virginica. Specifically, we tested two potential mechanisms to explain changes in oyster shell growth (cm), tissue dry weight (g) and gonad dry weight (g) when salinity moves away from the ideal range: 1) a negative effect on filtration rate and 2) an additional somatic maintenance cost. Comparative simulations of shell growth, dry tissue biomass and dry gonad weight in two monitored sites in coastal Louisiana experiencing salinity from 0 to 28 were statistically analyzed to determine the best hypothesis. Model parameters were estimated through the covariation method, using literature data and a set of specifically designed ecophysiological experiments. The model was validated through independent field studies in estuaries along the northern Gulf of Mexico. Our results suggest that salinity impacts C. virginica’s energy budget predominantly through effects on filtration rate. With an overwhelming number of environmental factors impacting organisms, and increasing exposure to novel and extreme conditions, the mechanistic nature of the DEB model with its ability to incorporate more than the standard food and temperature variables provides a powerful tool to verify hypotheses and predict individual organism performance across a range of conditions.   
PY 2017
PD NOV
SO Ecological Modelling
SN 0304-3800
PU Elsevier Science Bv
VL 363
UT 000413609300018
BP 221
EP 233
DI 10.1016/j.ecolmodel.2017.09.003
ID 51137
ER

EF