동자개(Pseudobagrus fulvidraco)의 생식소 퇴화에 미치는 수온과 광주기의 영향
동자개(Pseudobagrus fulvidraco)의 생식소 퇴화에 미치는 수온과 광주기의 영향
复制标题
黄颡鱼 (Pseudobagrus fulvidraco)
DOI：
10.13000/jfmse.2012.24.6.854
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
한창희
中科院分区：
文献类型：
--
作者：
임상구;김영수;한창희
为了研究温度和光周期作为调节黄颡鱼繁殖节律的环境因素的作用，在性腺退化期间使用多种饲养方案结合光周期和水温进行了饲养实验。对照组的性腺体指数（GSI）为8.16±1.50%，而其他实验中雌性的GSI水平低于对照组。在 9 光 (L) 和 15 L 的实验区中，GSI 水平降低。但20℃时GSI水平在40天和60天后没有差异。对照男性中的GSI水平为0.35±0.05%。 9 L、25℃下GSI与对照相似，而其他实验中其水平低于对照。实验区女性睾酮（T）为3.68±0.22 ng/mL。在9L和15L的情况下，在所有水温下T的浓度均低于实验区。实验区内雌性雌二醇-17β（E2）和7α,20β-二羟基-4-孕-3-酮（17α20βOHP）水平分别为0.42±0.02和0.83±0.01 ng/mL。 9L和15L的E2水平高于实验区，9L和15L的17α20βOHP水平高于实验区。在男性中，T 和 11-酮睾酮水平分别为 0.69±0.11 和 0.62±0.03 ng/mL。在性腺变性期间，任何实验方案中都没有发生性腺成熟。然而，无论光周期如何，在低温条件（20℃）下观察到的 E2 水平相对较高。
To investigate the role of temperatures and photoperiods as environmental cues regulating reproductive rhythm in Pseudobagrus fulvidraco, rearing experiments were conducted using sveral rearing regimes conbined with photoperiods and water temperatures during gonadal degeneration periods. Gonadosomatic index (GSI) in control was 8.16±1.50%, while in other experiment GSI levels in female were lower than that in the control. In case of experimental precinct of 9 light (L) and 15 L, GSI levels were decreased. But GSI level with 20℃ was no diffrence after 40 and 60 days. GSI level in male of control was 0.35±0.05%. GSI under 9 L and 25℃ was similar to that in control, whereas its level in other experiments was lower than that in control. Testosterone (T) of female was 3.68±0.22 ng/mL at experimental precinct. In case of 9 L and 15 L, concentration of T were lower than experimental precinct in all of water temperature. Estradiol-17β (E₂) and 7α, 20β-dihydroxy-4-pregnen-3-one (17α20βOHP) levels of female were 0.42±0.02 and 0.83±0.01 ng/mL at experimental precinct. E₂ levels of 9 and 15 L were higher than experimental precinct and 17α20βOHP levels of 9 and 15 L were higher than experimental precinct. In case of T and 11-ketotestosterone levels were 0.69±0.11 and 0.62±0.03 ng/mL in male. During the period of gonadal degeneration, gonadal maturation did not occur in any of the experimental regimes. However, comparatively high levels of E₂ observed at low temperature regimes (20℃) regardless of photoperiods.