La pollution dans le port d'Ostende et ses répercussions sur la réproduction de l'huître plate dans le Bassin de Chasse = La pollution dans le port d'Ostende et ses répercussions sur la réproduction de l'huître plate dans le Bassin de Chasse
Persoone, G. (1971). La pollution dans le port d'Ostende et ses répercussions sur la réproduction de l'huître plate dans le Bassin de Chasse = La pollution dans le port d'Ostende et ses répercussions sur la réproduction de l'huître plate dans le Bassin de Chasse, in: Zavodnik, D. (Ed.) Proceedings of the Sixth European Symposium on Marine Biology, Rovinj, Croatia, Yugoslavia September 27-October 2, 1971. Thalassia Jugoslavica, 7(1): pp. 279-294 In: Zavodnik, D. (Ed.) (1972). Proceedings of the Sixth European Symposium on Marine Biology, Rovinj, Croatia, Yugoslavia September 27-October 2, 1971. European Marine Biology Symposia, 6. Thalassia Jugoslavica, 7(1). 445 pp., more In: European Marine Biology Symposia., more |
| Available in | Author | | Document type: Conference paper
|
| Keywords | Anchorages > Harbours
Cultures > Shellfish culture > Mollusc culture > Oyster culture
Pollution > Water pollution > Brackishwater pollution
Reproduction
Ostrea edulis Linnaeus, 1758 [WoRMS]
ANE, Belgium, Oostende Harbour, Sluice Dock [Marine Regions]
Marine/Coastal; Brackish water |
| Abstract | The oyster culture, flourishing along the Belgian coast at the beginning of the century, perished entirely in the course of two World Wars. In 1956, it was taken on again intensively in the Scour Basin of Ostend. If we consider the obtained results with the affination of Flat and Portuguese oyster, this 86 ha closed basin, is of an exceptional productivity. Essays on the understanding of the origin of calcified oysters, done from 1960 until 1966, turned out to be very promising and an integral oyster culture from the larvae up to the adult oyster could be observed. In any case the last few years, eventhough compared to before a normal emission of larvae of Ostrea edulis, there has not been a fixation of the origin. Regular samples of plankton, effected from June until August, in 1969 and in 1970, revealed that the offspring of the Flat Oyster showed no growing, while the larvae of other bivalve species in the Scour Bassin, like Mytilus, Mya and Cardium, grew normally. Experiences of artificial oyster cultures in laboratory, effected in 1969 and in 1970, showed the same absence of growth when larvae were placed in water originating from the Scour basin, while in sea water originating from elsewhere, the offspring the stage of metamorphose of larvae was reached within 10 days. Possible causes for the unsuccessfulness are discussed in detail. We can deduce that the responsible factor would be of toxic order, and that its origin can most probably be found in the ever-growing pollution in the harbour of Ostend, which water feeds the Scour basin. |
|
