FN Archimer Export Format
PT J
TI Influence of low temperatures on the survival of the Pacific oyster (Crassostrea gigas) infected with Ostreid herpesvirus type 1
BT 
AF PERNET, Fabrice
   TAMAYO, David
   PETTON, Bruno
AS 1:1;2:1,2;3:3;
FF 1:PDG-RBE-PFOM;2:;3:PDG-RBE-PFOM-PI;
C1 IFREMER, UMR LEMAR UBO CNRS IRD Ifremer 6539, F-29280 Plouzane, France.
   Univ Pais Vasco Euskal Herriko Unibertsitatea, Fac Ciencia & Tecnol, Dept GAFFA Anim Physiol, Bilbao 48080, Spain.
   IFREMER, UMR LEMAR UBO CNRS IRD Ifremer 6539, F-29840 Argenton En Landunvez, France.
C2 IFREMER, FRANCE
   UNIV PAIS VASCO EHU, SPAIN
   IFREMER, FRANCE
SI BREST
   ARGENTON
SE PDG-RBE-PFOM
   PDG-RBE-PFOM-PI
UM LEMAR
IN WOS Ifremer jusqu'en 2018
   copubli-europe
IF 1.893
TC 37
UR https://archimer.ifremer.fr/doc/00259/37047/35555.pdf
LA English
DT Article
DE ;Bivalve;Disease;OsHV-1;Oyster;Temperature;Virus
AB Mortalities of oyster seed of Crassostrea gigas associated with ostreid herpes virus OsHV-1 μVar have been observed in many oyster producing countries since 2008. The objective of this study was to further investigate whether low temperature treatments can offer a viable option to mitigate oyster mortalities. An experiment was set-up to further evaluate the effect of low temperature treatments (10 and 13°C vs. 21°C) and their duration (6 d to 83 d) on the survival of oysters previously infected with OsHV-1 μVar by means of exposure to field conditions in areas where mortalities were occurring. Average survival of oysters infected with OsHV-1μVar was 71% after 83 d at low temperatures compared to only 23% in controls maintained at 21°C. During cold-exposure, levels of OsHV-1 DNA in oyster tissues gradually decreased, down to nearly the detection limit after 24 d. However, when cold-acclimated oysters were suddenly exposed at 21°C in the laboratory, they exhibited high levels of mortality along with an enhancement of OsHV-1 DNA concentration in their tissues. Therefore, OsHV-1 persists in oysters even at low temperature and is reactivated during subsequent thermal elevation to 21°C. Low temperature treatments did not improve overall survival of oyster seed infected with OsHV-1. These results suggest that moving infected oysters to a cooler area only delays mortality and may increase the risk of infection in neighbouring stocks when rising temperatures become permissive for viral replication.
PY 2015
PD AUG
SO Aquaculture
SN 0044-8486
PU Elsevier Science Bv
VL 445
UT 000354489000006
BP 57
EP 62
DI 10.1016/j.aquaculture.2015.04.010
ID 37047
ER

EF