Ki Se-Un, Lee Won-Kyo
Freshwater Fish Research Institute, Jangsung 57211, Korea.
Dept. of Aqualife Science, Chonnam National University, Yeosu 59626, Korea.
Dev Reprod. 2018 Mar;22(1):1-8. doi: 10.12717/DR.2018.22.1.001. Epub 2018 Mar 31.
The annual reproductive cycle of the Korean endemic slender catfish, , was examined histologically regarding water temperature and day length of habitat, gonadosomatic index (GSI), and development characteristics of female and male gonads. The maximum GSI value was found in May, 1.23±0.33 and 11.77±3.23 for male and female respectively (habitat water temperature 21.5°C/13.59hr day length). On the other hand, the minimal level was 0.63±0.10 in July (26.5°C/14.17) for male and 1.36±0.08 in October (20°C/11.2hr) for female. We compared and calculated the stages of testis and ovary development process in order to determine the germ cell development characteristics and the reproductive cycle. According to results, we classified the annual reproductive cycle of the slender catfish into five stages: Growing phase (December-February), Mature phase (March-April), Ripe and spawning phase / Releasing phase in male (May-June), Degenerative phase (July-August), and Resting phase (September-November).
对韩国特有细鲶的年度繁殖周期进行了组织学研究，涉及栖息地的水温、日照时长、性腺指数（GSI）以及雌雄性腺的发育特征。最大GSI值出现在5月，雄性为1.23±0.33，雌性为11.77±3.23（栖息地水温21.5°C/日照时长13.59小时）。另一方面，最低水平在7月，雄性为0.63±0.10（26.5°C/14.17），雌性在10月为1.36±0.08（20°C/11.2小时）。为了确定生殖细胞的发育特征和繁殖周期，我们对睾丸和卵巢的发育过程阶段进行了比较和计算。根据结果，我们将细鲶的年度繁殖周期分为五个阶段：生长期（12月至2月）、成熟期（3月至4月）、雄性的成熟产卵期/排精期（5月至6月）、退化期（7月至8月）和静止期（9月至11月）。
