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首页> 外文期刊>North American Journal of Aquaculture >Sex determination of yellow perch by external morphology.
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Sex determination of yellow perch by external morphology.

机译：通过外部形态确定黄色鲈鱼的性别。

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摘要

We developed a method of using external morphological characteristics to determine the sex of yellow perch Perca flavescens. The characteristics used were (1) the shape of the urogenital opening, (2) the shape of the anterior edge of the urogenital opening when thumb pressure was applied to the abdomen just anterior to the anus, and (3) the presence or absence of swelling around the anus. In females, the urogenital opening was crescent or half-moon shaped, its anterior edge remained linear when pressure was applied to the abdomen, and a ring-shaped area of swelling was present around the anus. In males, the urogenital pore was circular, its anterior end distended to a V or U shape (pointed anteriorly) when the abdomen was pressed, and the area around the anus was not generally swollen. The accuracy of using this method was 97.4% for fish 190-280 mm total length, 93.1% for fish 111-150 mm, and 82.7% for fish 80-110 mm.
机译：我们开发了一种利用外部形态特征来确定黄鲈 Perca flavescens 性别的方法。使用的特征是（1）泌尿生殖器开口的形状，（2）当拇指压力施加于肛门正前方的腹部时，泌尿生殖器开口的前边缘的形状，以及（3）是否存在肛门周围肿胀。在女性中，泌尿生殖器的开口呈月牙形或半月形，当对腹部施加压力时，其前边缘保持线性，并且肛门周围出现环形肿胀区域。在男性中，泌尿生殖孔是圆形的，当按压腹部时，其前端扩大为V或U形（指向前方），并且肛门周围的区域通常不会肿胀。对于长度为190-280毫米的鱼，使用此方法的准确性为97.4％，对于长度为111-150毫米的鱼为93.1％，对于长度为80-110毫米的鱼为82.7％。

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