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首页> 外文期刊>Zootecnia Tropical >Masculinizatin of Nile tilapia Oreochromis niloticus (Actinopterygii: Cichlidae) by immersion in fluoximesterone and testosterone enanthate
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Masculinizatin of Nile tilapia Oreochromis niloticus (Actinopterygii: Cichlidae) by immersion in fluoximesterone and testosterone enanthate

机译：尼罗罗非鱼（Actinopterygii：Cichlidae）浸泡在氟西米酮和庚酸酯中的男子气概

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The effect of the hormone fluoximesterone (F) and testosterone enanthate (T) were evaluated in the growth, survival and the sex ratio of offspring of Oreochromis niloticus . In 50 liter tanks, 38 larvae were placed in each experimental unit. Treatments were triplicated: F4 400 gl-1; F12 1.200 gl-1 ; F20 2.000 gl-1; and T4 400 gl-1 ; T12 1.200 gl-1; T20 2.000 gl-1, as well as controls for water (A) and water plus alcohol (EA). The rate of growth was measured in length (TEC-L) and in weight (TEC-P). The experiment ended when the fish had reached an age of 138 days after fertilization (DPF). The sex ratio was determined by the direct observation of the gonad using a stereoscope and a compound microscope. After the experiment concluded, there were no significant differences in TEC-P, TEC-L, nor in survival in the treatments and controls. In the sex ratio, there were significant differences between treatments, indicating that F20 (93%) was significantly higher than controls A (58%) and AE (62%) and treatments F12 (72%), T4 (69% ), T20 (65%). F20 was statistically similar to F4 (79%) and T12 (73%). Treatments F4, F12, T4, T12 and T20, showed no significant differences compared to controls A and AE. The masculinization obtained with treatment by fluoxymesterone immersion (2000 mg l-1) allows us to consider this procedure as efficient for the production of male progeny of tilapia.
机译：在尼罗罗非鱼（Oreochromis niloticus）的后代的生长，存活和性别比中评估了氟肟酮（F）和睾丸酮庚酸酯（T）的作用。在50升的水箱中，在每个实验单元中放置38只幼虫。处理一式三份：F4 400 gl-1; F12 1.200 gl-1; F20 2.000 gl-1;和T4 400 gl-1; T12 1.200 gl-1; T20 2.000 gl-1，以及水（A）和水加酒精（EA）的对照。生长的速度以长度（TEC-L）和重量（TEC-P）测量。当鱼受精后（DPF）年龄达到138天时，实验结束。通过使用立体镜和复合显微镜直接观察性腺来确定性别比。实验结束后，在治疗和对照组中，TEC-P，TEC-L和存活率均无显着差异。在性别比例上，治疗之间存在显着差异，表明F20（93％）显着高于对照组A（58％）和AE（62％），以及治疗F12（72％），T4（69％），T20 （65％）。 F20在统计上类似于F4（79％）和T12（73％）。与对照A和AE相比，处理F4，F12，T4，T12和T20没有显示出显着差异。通过氟甲睾酮浸泡处理（2000 mg l-1）获得的男性化效果使我们认为该方法可有效生产罗非鱼的雄性后代。

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