Predation of oyster larvae by Aurelia aurita in a Norwegian oyster pond
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Original versionThis report is not to be cited without prior reference to the authors
In the norwegian oyster spatting ponds several factors may influence the spat production. During a basic, general study in a pond in 1983-84, Aurelia aurita was demonstrated to be a heavy predator on pelagic oyster larvae, reducing the spat production to zero. The medusae occurred at a density of up to 125 ind. pr. m 3. Body areas of individual medusae (x) and the number of oyster larvae in a medusa (y), followed the linear relationship y = 0.08X-0,01. The size of oyster larvae in plankton, in the digestive system of the medusae, or in sediment traps never exceeded 200 ll m, suggesting that the larvae lived for maximum 3 days before they were eaten.