Caractéristiques biologiques des gamètes et larves d'huître plate européenne (Ostrea edulis): données préliminaires
Year: 2017
Type: report
Abstract: The biology of gametes and larvae in brooding mollusc species remains little explored. The aim of this study is to present the results obtained in 2016, on biological characteristics of gametes and larvae of European flat oyster.\n Measurements were carried out on 50 oysters, collected by divers in the Rade de Brest (Finistère, France), during the spawning period of this species. Gonad pH is acidic (6.58±0.54). After the dissociation of spermatozeugmata, an acellular structure to which the spermatozoa are clustered, the percentage of motile spermatozoa ranged from 20 to 34% and the Velocity of the Average Path from 70 to 85µm/s. Spermatozeugmata were shed after serotonin injection. Oocytes (mean diameter: 129.4±19.1µm) were rarely observed (2 oysters/50). White (mean quantity: 2.14 106 larvae/oyster) and grey (1.23 106) larvae were collected. After incubation in beakers, the survival rates ranged from 39 to 59%.\n Biological characteristics of European flat oyster gametes and larvae are compared to those observed in other mollusc species. The present results would improve the knowledge of reproduction, support the protection and favour the establishment of management protocols of gametes and larvae in this species.\n
Language: English
Subfield: Global and Planetary Change
Field: Environmental Science
Domain: Physical Sciences
SDG: Life below water
Open Access status: green
OpenAlex ID: W2610813407