论文部分内容阅读
通过性腺指数周年监测及性腺的组织切片观察,对黄海北部虾夷扇贝性腺发育及繁殖规律进行了研究。试验结果表明,虾夷扇贝性腺发育可划分为5期,即增殖期(Ⅰ期)、生长期(Ⅱ期)、成熟期(Ⅲ期)、排放期(Ⅳ)和休止期(Ⅴ期)。性腺周年变化规律是,11—12月为增殖期,1—2月为生长期,3月为成熟期、4—5月为排放期,6—10月为休止期。水温对性腺发育和产卵期的影响是,水温低性腺指数峰值高,产卵期相对滞后;水温高性腺指数峰值低,产卵期相对提早。
The gonadal development and reproduction in the northern part of the Yellow Sea were studied by monitoring the gonadal index and observing the gonadal tissue sections. The results showed that the gonadal development of Scallop yakis can be divided into five stages, ie, the proliferative phase (Phase I), the growth phase (Phase II), the mature phase (Phase III), the discharge phase (IV) and the resting phase (Phase Ⅴ). The regular pattern of gonadal change is from November to December as the proliferative phase, from January to February as the growth phase, from March as the mature phase, from April to May as the discharge phase, and from June to October as the rest phase. The effect of water temperature on gonadal development and spawning period is that the water temperature has a high peak of low gonadal index and relatively laggard spawning period; the peak of water temperature gonadal index is low, and the spawning period is relatively earlier.