Andre Gerard
IFREMER
63 Papers
312 Citations
Andre Gerard is an academic researcher from IFREMER. The author has contributed to research in topics: Crassostrea & Oyster. The author has an hindex of 23, co-authored 63 publications.
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Papers
Selecting the flat oyster Ostrea edulis (L.) for survival when infected with the parasite Bonamia ostreae
TL;DR: Good evidence for additivity of the resistance was provided by both the intermediate behaviour of a cross between S85-G2 and the controls and the rapid improvement that was obtained from the first generations, and the selected strains showed a tendency toward higher weights and higher weight variances when compared to controls.
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Population bottleneck and effective size in Bonamia ostreae-resistant populations of Ostrea edulis as inferred by microsatellite markers.
TL;DR: Genetic variability at five microsatellite loci was analysed in three hatchery-propagated populations of the flat oyster, Ostrea edulis, and a reduction in the number of alleles was observed in all selected populations, relative to the natural population from which they were derived.
Influences of triploidy, parentage and genetic diversity on growth of the Pacific oyster Crassostrea gigas reared in contrasting natural environments.
Pauline Garnier-Géré,Yamama Naciri-Graven,Serge Bougrier,Antonios Magoulas,Maurice Heral,Georgios Kotoulas,Anthony J. S. Hawkins,Andre Gerard +7 more
TL;DR: Positive associations between individual allozyme diversity and growth were detected, and measures of individual distance were negatively correlated with growth in diploids, indicating possible effects of outbreeding depression between more distant genomes of parents from distinct populations.
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A genetic and metabolic basis for faster growth among triploids induced by blocking meiosis I but not meiosis II in the larviparous European flat oyster, Ostrea edulis L.
Anthony J.S. Hawkins,Amanda J. Day,Andre Gerard,Yamama Naciri,Christophe Ledu,B. L. Bayne,Maurice Heral +6 more
TL;DR: In this paper, the authors established a genetic and metabolic basis to faster triploid growth in the oyster Ostrea edulis using cytochalasin B and image analysis of biopsied tissue employed to ensure similar ploidy of all animals within each class.
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Performance of triploid Pacific oysters Crassostrea gigas (Thunberg) reared in high carrying capacity ecosystem : survival, growth and proximate biochemical composition
Philippe Goulletquer,Jean-Pierre Joly,Andre Gerard,Eric Le Gagneur,Jacques Moriceau,Jean-Marie Peignon,Serge Heurtebise,Pascal Phelipot +7 more
- 01 Jan 1996
TL;DR: Treated diploids were found more sensitive to environmental conditions than controls, demonstrating long term CS effect on oysters, and the method of induction should be improved to maximize triploidy and long term survival rates.
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