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研究了克氏原螯虾(Procabarus clarkia)的胚胎发育过程,结果表明:(1)克氏原螯虾受精卵的颜色变化过程为棕色→棕色中夹杂着黄色→黄色中夹杂着黑色→黑色;(2)克氏原螯虾的胚胎发育过程共分12期:受精卵、卵裂期、囊胚期、原肠前期、出现半圆形内胚层沟、出现圆形内胚层沟、原肠后期、无节幼体前期、无节幼体后期、前蚤状幼体期、蚤状幼体期和后蚤状幼体期;(3)在9月份时,整个孵化期间的水温为19～30℃,平均水温为25.8℃,胚胎发育时间为17～20 d,在此期间孵化所需要的有效积温为453～516℃·d;而在11月份时,孵化期间的水温为4～10℃,平均水温5.2℃,胚胎发育时间为90～100 d,孵化所需要的有效积温为462～520℃·d。
The process of embryonic development of Procabarus clarkia was studied. The results showed that: (1) The process of color change of Procambarus clarkii was brown → brown mixed with yellow → yellow mixed with black → black; (2) ) Procambarus clarkii embryonic development is divided into 12 stages: fertilized eggs, cleavage stage, blastocyst stage, pre-gut, there are semi-circular endodermal groove, there is a circular endodermal groove, the original stage of intestinal gut, no section Early nauplii, late nauplii, pre-flea larvae, flea-like larvae and post-flea larvae; (3) in September, the temperature during the entire incubation period was 19-30 ° C and the average water temperature was 25.8 ° C, The embryo development time was 17-20 days, and the effective accumulated temperature required for hatching during this period was 453-516 ℃ · d. In November, the water temperature during incubation was 4-10 ℃ and the average water temperature was 5.2 ℃. The embryonic development time For 90 ~ 100 d, the effective accumulated temperature required for hatching is 462 ~ 520 ℃ · d.