摘要
广东鲂胚胎发育的最低和最高临界水温分别是２０℃和３１℃，最适水温范围是２４～２８℃。胚胎发育所需时间与水温成负相关关系；水温对胚胎发育速率的影响后期较前期大。胚胎发育的最高临界盐度为１１，最适盐度范围是０～７；一定范围的盐度对广东鲂胚胎发育和孵化出膜有良好的刺激作用。盐度对胚胎发育速率的影响远不及水温对其的影响大。
Responses of Megalobrama hoffmanni embryos to various incubation water temperatures and salinity were measured in terms of hatchability and survival rate. The upper and lower limiting incubation temperatures were estimated at 31and 20℃respectively. The optimum incubation temperature for Megalobrama hoffmanni embryos was 24-28℃.Time for embryonic development was inversely related to incubation temperature. Effects of temperature on embryonic development was greater in later period than in the previous one. The upper limiting incubation salinity was 11, while the optimum range were estimated to be 0-7.A certain range of salinity had some positive contributions to embryonic development and hatchability. The effects of salinity on Megalobrama hoffmanni embryos were not so obvious as the temperature was.
出处
《水产学报》
CAS
CSCD
北大核心
1998年第4期322-327,共6页
Journal of Fisheries of China
关键词
广东鲂
胚胎发育
水温
盐度
Megalobrama hoffmanni, Embryonic development, Temperature, Salinity
