On the Seedling Time of the Mangrove Oyster, Crassostrea rhizophorae, in the Lagoon of Cocineta in Venezuela

Venezuela국 Cocineta호산 Mangrove oyster의 채묘시기

An investigation on the breeding time of the Mangrove oyster, Crassostrea rhizaphorae, in the lagoon of Cocineta which is located in the northwestern part of Venezuela was carried out from February through May in 1976. Surface water temperature was high, over $25^{\circ}C$ and specific gravity was around 1.0258. Transparency to water depth varied between 29 and $80\%$. The range of water content of the oysters increased from February through May. However, the averge monthly range of water content varied only slightly from 80.67 to $82.25\%$. From the numbers of matured planktonic larvae together with total numbers of planktonic larvae found, we may assume that the best seedling period is from late April through early May. We may also assume that the best area is around stations 4 and 3, station 3 being slightly better than station 4.

1976년 2월부터 5월까지 사이에 Venezuela국 서북부에 있는 Cocineta호산 굴의 채묘시간에 대하여 조사했다. 수분 함량 중 개체간의 수분 함량 범위는 2월에서 부터 5월로 되면서 차차 넓어졌고, 월별 수분 함량의 평균 값은 그 범위가 $80.67\~82.25\%$로서 큰 차가 없었다. 성숙 부유 유생 및 출현수로부터 채묘 시기로서 가장 좋다고 생각되는 시기는 4월 하순에서 5월 상순 사이이고 채묘 장소로서 가장 좋다고 생각되는 곳은 station 3이었으며 그 다음이 station 4였다.