摘要
本文叙述了,在室内控制条件下,温度和盐度对菲律宾蛤仔稚贝生长及发育的影响。蛤仔稚贝生长的适宜水温为15—30℃,其中以25℃为最好。在此温度范围内,稚贝生长迅速,成活率高达80％以上。稚贝对10℃以下的低温有强的忍耐性,也能忍耐35℃的高温,其死亡的临界温度在40℃左右。稚贝生长的适宜盐度为14.0—33.5‰,最适盐度是20.5‰左右。在此盐度范围内,稚贝发育整齐,成活率高达85％以上。生长的盐度下限和上限分别为7.5‰和40.0‰左右。幼虫变态的适宜盐度在 20.5—33.5‰之间,在此盐度范围内,幼虫成活率为65％以上。盐度在27‰时幼体的成活率最高,达到92.5％。幼虫变态的盐度下限为7.5‰左右,而上限则在于40.0—46.5‰之间。
The effects of temperature and salinity on the growth and development of thespats of the clam (Ruditapes philippinarum) had been investigated. The resultsobtained show that the suitable development temperature range from 15°to 30℃. In thisrange of temperature the spats grow rapidly and the survival rate reaches above 80%,and the optimum temperature is 25℃. The spats show strong tolerance to the low temperature below 10℃ and to the high temperature to 35℃. The lethal critical tem-perature is about 40℃. The suitable salinity for the growth of spats is about 14.0-33.5‰ and 20.5‰ isthe optimum. Within this range the spats develop uniformly with a survival rate over85%. The upper and lower critical salinity for the growth of the spats are about 7.5‰and 40‰ respectively. The suitable salinity for metamorphosis of larvae is in the range of 20.5-33.5‰.The survival rate of holometamorphosis is above 65%. The maximum rate of holome-tamorphosis is more than 92.5% in the salinity of 27‰. The lower and upper limitsfor the larval metamorphosis are 7.5‰ and 40.0-46.5‰ respectively.
出处
《水产学报》
CAS
1983年第1期15-23,共9页
Journal of Fisheries of China
