FN Archimer Export Format
PT J
TI Influence of food density and temperature on ingestion, growth and settlement of Pacific oyster larvae, Crassostrea gigas
BT 
AF RICO VILLA, Benjamin
   POUVREAU, Stephane
   ROBERT, Rene
AS 1:1;2:1;3:1;
FF 1:PDG-DOP-DCB-PFOM-PI;2:PDG-DOP-DCB-PFOM-PI;3:PDG-DOP-DCB-PFOM-PI;
C1 IFREMER, Dept Physiol Fonct Organismes Marins, Stn Expt Argenton, F-29840 Argenton, France.
C2 IFREMER, FRANCE
SI ARGENTON
SE PDG-DOP-DCB-PFOM-PI
IN WOS Ifremer jusqu'en 2018
IF 1.925
TC 99
UR https://archimer.ifremer.fr/doc/2008/publication-4747.pdf
LA English
DT Article
DE ;Temperature;Food;Growth;Ecophysiology;Bivalve larvae;Crassostrea gigas
AB Ingestion, growth and metamorphosis of Pacific oyster, Crassostrea gigas, larvae were studied under controlled conditions of food density and temperature using a combination of a flow-through rearing system and a hydrobiological monitoring device. In a first experiment larvae were exposed to three different phytoplankton densities (12, 20 and 40 cells μl-1) while in a second trial larvae were reared at five different temperatures (17, 22, 25, 27 and 32°C). Both food concentration and temperature significantly affected the larval physiology throughout the entire development from D-veliger to young spat. Larvae survived over a wide range of both environmental parameters with high survival at the end of experiments. The feeding functional response provided the maximal ingestion rate (50 000 cells larva-1 day-1) which occurred at an algal density of 20 cells μl-1 surrounding the larvae and 25 °C. At the highest temperature (32 °C), maximal growth and metamorphosis performances were reached in less than 2 weeks while the lowest temperature (17°C) consistently inhibited ingestion and growth over the entire larval period. The estimate of the Arrhenius temperature (TA) was 11000 K for C. gigas larvae. Larval development could be divided on the basis of feeding activity into an initial mixotrophic period with a lower and constant ingestion over the first days (from D- stage to early umbonate larva of ≈110 μm length) followed by an exotrophic phase characterized by a sharp increase in ingestion (umbonate to eyed of ≈ 300 μm length) and, finally, a third period for larvae  300 μm during which ingestion decreased suddenly because of metamorphosis. Optimum larvaldevelopment and settlement of the oyster C. gigas occurred at 27 °C and an increasing food supply as the larvae were growing. A food density of ≥20 cells μl-1 of T-ISO + CP or CG (1:1 cells number) in the culture water was required to maximise growth and metamorphosis success.
PY 2009
PD FEB
SO Aquaculture
SN 0044-8486
PU Elsevier
VL 287
IS 3-4
UT 000263388500024
BP 395
EP 401
DI 10.1016/j.aquaculture.2008.10.054
ID 4747
ER

EF