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首页> 外文期刊>Journal of Field Ornithology >Sex determination of adult Rock Shags by molecular sexing and morphometric parameters
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Sex determination of adult Rock Shags by molecular sexing and morphometric parameters

机译：通过分子性别鉴定和形态计量学参数确定成年粗毛的性别

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摘要

Male and female Rock Shags (Phalacrocorax magellanicus) are not obviously sexually dimorphic in plumage or size and are thus difficult to distinguish in the field. We evaluated the utility of two different DNA-based techniques for sexing adult Rock Shags. We found that the primer set 2550F/2718R (originally tested in three individuals of P. carbo), with minor differences in the forward primer, provided a consistent and simple sexing method for Rock Shags. Moreover, we obtained three reliable discriminant functions for sexing adults from three different colony sites between 42° to 47°S in coastal Patagonia, Argentina. Discriminant analysis of five external characters of adult birds indicated that head, bill, and wing lengths were the most accurate variables for use in a discriminant function model, predicting the sex of 80―86% of the birds. Males were significantly larger than females for all body measurements except for bill depth. Rock Shags showed less marked sexual dimorphism than other phalacrocoraciid species.
机译：雄性和雌性粗毛（Phalacrocorax magellanicus）的羽毛或大小没有明显的两性，因此很难在野外区分。我们评估了两种不同的基于DNA的技术对成年Rock Shags进行性交的效用。我们发现，引物组2550F / 2718R（最初在三只P. carbo个体中进行了测试），正向引物中的细微差异，为Rock Shags提供了一致且简单的性鉴定方法。此外，我们获得了三种可靠的判别函数，用于在阿根廷巴塔哥尼亚沿海42°至47°S的三个不同殖民地进行成年性交。对成年鸟的五个外部特征的判别分析表明，头，身长和翼长是判别函数模型中使用的最准确的变量，可预测80-86％的鸟的性别。在所有身体测量中，男性的身高明显大于女性，除了账单深度。岩石粗毛动物的性二态性不如其他翼龙类物种明显。

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