A comparative growth trial between diploid and triploid pacific oysters (crassostrea gigas) on the South coast of Ireland

Diversion of energy in diploid Pacific oysters, Crassostrea gigas, away from somatic growth during spewing has lead to the development and increased use of sterile triploid Pacific oysters. Because of their lack of reproductive ability somatic tissue growth remains constant during this period (Allen...

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Bibliographic Details
Main Authors: Cooper, H., Burnell, G.
Other Authors: AQUACULTURE DEVELOPMENT CENTRE UNIVERSITY COLLEGE CORK IRL
Format: Conference Object
Language:English
Published: Cemagref Editions 1994
Subjects:
Online Access:https://irsteadoc.irstea.fr/cemoa/PUB00003994
Description
Summary:Diversion of energy in diploid Pacific oysters, Crassostrea gigas, away from somatic growth during spewing has lead to the development and increased use of sterile triploid Pacific oysters. Because of their lack of reproductive ability somatic tissue growth remains constant during this period (Allen et al ., 1989. In the first eight month of growth we found no significant difference between diploid and triploid growth, although he site in which they were grown has a significant effect. Mortality of the triploids was less than that of the diploids leading to suggestions of a survival advantage. The continuation of this project into a further year should yield results which will allow more conclusive comments about the performance of triploids compared to diploids in the Irish waters. / L'utilisation de l'énergie chez l'huître du Pacifique diploïde, Crassostrea gigas, durant la ponte, au détriment de la croissance somatique, a conduit au développement de l'utilisation d'huîtres triploïdes stériles. A cause de leur perte de possibilité de reproduction, la croissance des tissus somatiques reste constante durant cette période (Allen et al., 1989). Pendant les 8 premiers mois de croissance, nous n'avons observé aucune différence significative de croissance entre diploïde et triploïdes, bien que le site dans lequel elles étaient cultivées ait eu un effet significatif. La mortalité des triploïdes est moindre que celle des diploïdes. La poursuite de ce projet dans les prochaines années devrait donner des résultats permettant des conclusions plus fiables sur les performances respectives des triploïdes et diploïdes dans les eaux Irlandaises.