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首页> 外文期刊>Zoological Science >Sex Differences and the Heritability of Scute Pattern Abnormalities in the Green Sea Turtle from the Ogasawara Archipelago, Japan
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Sex Differences and the Heritability of Scute Pattern Abnormalities in the Green Sea Turtle from the Ogasawara Archipelago, Japan

机译：日本Ogasawara Archipelago中绿海龟刺柔性模式异常的性别差异及其遗传性

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摘要

Although scute pattern abnormalities in sea turtle species are considered to be strongly correlated with survival rate, there is little information available regarding these abnormalities and the primary cause for their development is unclear. For the conservation of sea turtle species, accumulating basic knowledge of scute pattern abnormalities is a fundamental step towards a better understanding of the causes of these abnormalities. In the present study, we counted vertebral and costal scutes from adults hunted for food (male and female) (n = 899), nesting females (n = 155), and hatchlings (n = 44,537) of the green sea turtle (Chelonia mydas) from the Ogasawara Archipelago, Japan. We found that the frequency of turtles with non-modal scute patterns was significantly greater in adult females than that in adult males (P = 0.02). Since females are produced by warmer incubation temperatures, and the period of sex determination coincides with the period of scute pattern determination, high incubation temperatures may be responsible for the induction of scute pattern abnormalities. Moreover, females with non-modal scute patterns produced a higher frequency of hatchlings with non-modal scute patterns than females with modal scute patterns (P < 0.01), indicating that scute abnormality may be heritable. For conservation of this species, our results suggest that decrease of the incubation temperature by cooling methods, such as provision of shade, may minimize the frequency of non-modal scute patterns, with consideration for the natural sex ratio.
机译：虽然海龟物种中的鳞状样品异常被认为与生存率强烈相关，但有关这些异常的信息很少，并且其发展的主要原因尚不清楚。为了保护海龟物种，累积鳞片样式异常的基本知识是更好地理解这些异常的原因的基本步骤。在目前的研究中，我们计算成年人的椎骨和肋骨曲线为食物（男性和女性）（n = 899），嵌套女性（n = 155），以及绿龟（Chelonia mydas）的幼体（n = 44,537） ）来自日本的Ogasawara群岛。我们发现，在成年女性中，具有非模态鳞状模式的乌龟的频率明显大于成年男性（P = 0.02）。由于女性由较温暖的孵育温度产生，并且性别测定的时期与曲柔图案测定的时期一致，高培养温度可能是诱导鳞状样品异常的诱导。此外，具有非模态漂移模式的女性产生了比雌性鳞状样式的非模态鳞状样式的幼龟较高的横截单（P <0.01），表明漂亮异常可能是遗传性的。为了保护该物种，我们的结果表明，通过冷却方法孵化温度降低，例如提供阴影，可能考虑到自然性别比率。

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