几种环境因子对墨西哥湾扇贝幼虫和稚贝生长与存活的影响

INFLUENCES OF SOME ENVIRONMENTAL FACTORS ON GROWTH AND SURVIVAL OF ARGOPECTEN IRRADIANS CONCENTRICUS LARVAE AND JUVENILES

叙述了在室内控制条件下海水温度、盐度和pH因子对墨西哥湾扇贝Argopectenirra diansconcentricus浮游幼虫和稚贝生长和存活的影响。结果表明,墨西哥湾扇贝浮游幼虫生长的适宜温度为20—30℃,最佳生长温度为25—30℃。稚贝生长的适宜温度为15—33℃,最适生长温度为25—30℃。浮游幼虫生长的适宜盐度为23.38—42.70,最适生长盐度为23.38—36.58;稚贝生长的适宜盐度为23.38—42.70,最适生长盐度为23.38—36.58;在pH为7—8时,稚贝存活率最高,生长最好。稚贝的耐干露能力低下。

Experiments were carried out in a marine culture field of Zhejiang Province from Apr.2000 to Apr.2001. Under the conditions of controlled seawater temperature, salinity and pH, the influences of temperature and salinity on the growth and survival of Argopecten irradians concentricus larva and juveniles were studied respectively. The results showed that the suitable temperature was 20—30℃ for larvae and 15—33℃ for juveniles, and the most suitable growth temperature was 25—30℃ for larvae and 25—30℃ for juveniles; suitable salinity was 23.38—42.70 for larvae and 23.38—42.70 for juveniles, and the most suitable growth salinity was 23.38—36.58 for larvae and 23.38—36.58 for juveniles. The growth was the best and the survival rate was the highest at sea water pH value from 7 to 8. The ability to resist exposure and dry was low for juveniles.