摘要
本文研讨了各种人控恒温和自然水温对中华绒螯蟹胚胎发育周期,各发育阶段以及卵裂同步率等的影响。在水温9.6±3.6℃到23℃之间,中华绒螯蟹的胚胎均能发育;最适发育水温为18—23℃。29℃以上,胚胎不能发育。变温对胚胎发育有益。胚胎在卵裂阶段对水温特别敏感,水温越高,卵裂虽然越快,但卵裂期同步率越低;胚胎处在自然水温中,经过低温,卵裂期同步率最高。
The effects on embryonic development of the Chinese mitten-handed (Eriocheir sinensis) at water temperature which included six sets of 15℃, 18℃, 23℃, 26℃, 29℃ and ambient temperature were studied by light microscopic from December, 1987 to May, 1988. The results showed briefly in the following:
1. The water temperature ranges from 9.6 ± 3.6℃ to 23℃ were suitable for embryonic development of the Chinese mitten-handed crab, beyound this water temperature ranges, it would be dangerous or lethal to the crabs.
2. The optimum water temperature for embryonic development of the Chinese mitten-handed crab was 18-23℃.
3. The early development of the embryo was quite sensitive to water temperature, the higher water temperature was, the less time embryonic development spent, but embryonic concordant rate was gradually decreased.
4. Alternating water temperature was found out to benefit for embryonic development of the crab.
关键词
中华绒螫蟹
胚胎发育
水温
Eriocheir sinensis, Embryonic development, Water temperature
