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首页> 外文期刊>Fisheries and Aquatic Sciences >Stimulation of Ovarian Development in a Tropical Damselfish by Prolonged Photoperiod using Pellets Containing Long-afterglow Phosphorescent Pigment
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Stimulation of Ovarian Development in a Tropical Damselfish by Prolonged Photoperiod using Pellets Containing Long-afterglow Phosphorescent Pigment

机译：使用含有长余辉磷光颜料的颗粒，通过延长的光周期刺激热带雀鲷的卵巢发育

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The present study examined whether light emitted by long-afterglow phosphorescent pigments (LumiNova) would stimulate gonadal development in fish during the nonbreeding season. Pellets containing LumiNova powder (treatment group) were prepared and placed on the calvaria of specimens of the sapphire devil Chrysiptera cyanea, a reef-associated damselfish that requires long days for gonadal recrudescence. A pellet without LumiNova powder was placed on the calvaria of the control fish (control group). Fish were reared at under a light-dark cycle (12 h photophase, 12 h scotophase; LD 12:12) for 4 weeks. No difference in the gonadosomatic index (GSI) or ovarian histology was observed among the control, sham-operation, and treatment groups 1 week after the start of the experiment. After 4 weeks, the GSI of the control and sham-operation groups remained at low levels, and ovaries contained immature oocytes at the perinucleolus stage. In contrast, the treatment group exhibited significantly higher values of GSI as well as developed ovaries with fully vitellogenic oocytes. These results demonstrated that long-day conditions were produced by light emitted from the LumiNova pellets, thus stimulating ovarian development in the damselfish. Therefore, long-afterglow phosphorescent pigments can be used as an alternative to standard light sources for purposes of artificial stimulation of gonadal development in fish.
机译：本研究检查了长余辉磷光颜料（LumiNova）发出的光在非繁殖季节是否会刺激鱼类的性腺发育。制备含有LumiNova粉末的小丸（治疗组），并将其置于蓝宝石魔鬼蓝藻（Crysiptera cyanea）的标本的颅骨上，这是一种与珊瑚礁相关的雀鲷，需要长时间才能进行性腺复发。将不含LumiNova粉末的沉淀物置于对照鱼（对照组）的颅盖上。将鱼在明暗周期下（光相12 h，暗相12 h; LD 12:12）饲养4周。在实验开始后1周，对照组，假手术组和治疗组之间未观察到性腺体指数（GSI）或卵巢组织学差异。 4周后，对照组和假手术组的GSI保持较低水平，卵巢在核仁周围阶段含有未成熟的卵母细胞。相反，治疗组显示出明显更高的GSI值，以及卵母细胞完全卵黄形成的卵巢。这些结果表明，LumiNova药丸发出的光产生了长期的条件，从而刺激了雀鲷的卵巢发育。因此，出于人工刺激鱼的性腺发育的目的，可以使用长余辉的磷光颜料作为标准光源的替代品。

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