New microalgae for the Pacific oyster Crassostrea gigas larvae

Type Article
Date 2006-03
Language English
Author(s) Ponis Emanuele1, 2, Probert Ian3, Veron Benoit2, 3, Mathieu Michel2, Robert ReneORCID1
Affiliation(s) 1 : IFREMER, Lab Physiol Invertebres Marins, Stn Expt Argenton, UMR100, F-29840 Landunvez, France.
2 : Univ Caen Basse Normandie, IFREMER, UMR 100, Lab Biol Biotechnol Marines, F-14032 Caen, France.
3 : Univ Caen Basse Normandie, Algobank Caen, F-14032 Caen, France.
Source Aquaculture (0044-8486) (Elsevier), 2006-03 , Vol. 253 , N. 1-4 , P. 618-627
DOI 10.1016/j.aquaculture.2005.09.011
WOS© Times Cited 33
Keyword(s) Biochemical composition, Larval nutrition, Mollusc hatchery, Microalgae
Abstract The number of microalgae of high nutritional value actually available to mollusc hatcheries is limited to a few species and this represents a constraint for the industry. Fifteen microalgal species belonging to seven different taxonomic classes were selected from the Algobank-Caen microalgal culture collection of the University of Caen. An initial screening of these microalgae, based on their cytomorphological characteristics and growth performances, led to the selection of four species (Imantonia rotunda, Emiliania huxleyi, Pseudoisochrysis paradoxa and Diacronema vlkianum), which were then tested as food for Crassostrea gigas larvae. Two species (L rotunda and E huxleyi) were of poor food value for oyster larvae, while P paradoxa and D. vlkianum resulted in high growth rate and low mortality. These two microalgae were then characterised (dry weight, ash, gross composition, fatty acids) at different stages of growth and their productivity in standard hatchery conditions (2-1 glass carboys, 300-1 cylinders) was assessed in order to evaluate the potential of these species for use in commercial hatcheries.
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