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首页> 外文期刊>Polar biology >Geographic morphological variation of Gentoo penguin (Pygoscelis papua) and sex identification: using morphometric characters and molecular markers
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Geographic morphological variation of Gentoo penguin (Pygoscelis papua) and sex identification: using morphometric characters and molecular markers

机译：巴布亚企鹅的地理形态变异和性别识别：使用形态特征和分子标记

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摘要

Gentoo penguins Pygoscelis papua have sexual dimorphism, which females have smaller morphological measurements than males. P. papua also shows a geographic morphological variation, decreasing in size toward southern latitudes. Therefore, morphological measurements may vary in space and overlap in the distribution of traits between females and males, which could lead to sex mis-identification. A total of 300 blood samples and eight measurements and weight were obtained for Gentoo penguins from three localities in the South Shetland Islands and the Antarctic Peninsula. The molecular sex was identified for all individuals using two primer pairs (P2/P8 and PL/PR). We obtained higher success amplification for P2/ P8 compared to PL/PR. We used 172 adults to create a morphological discriminant function using the backward stepwise method. We established a discriminant function for sex identification of each locality due to significant morphological differences found between sexes and between the three studied localities for adult Gentoo penguins. Using these functions, the percentages of individuals correctly assigned was 93.87 % in Ardley Island, 88.09 % in Bernardo O'Higgins, and 83.95 % in Gabriel Gonzalez Videla. The most southern locality studied was the most morphologically divergent from the others and with low divergence between sexes. Moreover, we also established a general function for the Gentoo penguin, which can be used to identify the sex of penguins from a broad number of localities. Therefore, molecular and biometric are useful techniques for sexing Gentoo penguins.
机译：巴布亚企鹅Pygoscelis papua具有性二态性，雌性的形态学特征比雄性小。番木瓜还显示出地理形态的变化，其大小向南纬度减小。因此，形态学测量可能在空间上变化并且在女性和男性之间的性状分布中重叠，这可能导致性别错误识别。从南设得兰群岛和南极半岛的三个地方获得了300份Gentoo企鹅的血样，共进行了8次测量和体重测定。使用两个引物对（P2 / P8和PL / PR）鉴定了所有个体的分子性别。与PL / PR相比，我们获得了P2 / P8更高的成功放大率。我们使用172位成年人使用向后逐步方法创建了形态学判别函数。由于在性别之间以及成年的Gentoo企鹅的三个研究区域之间发现了明显的形态差异，因此我们为每个区域的性别识别建立了判别函数。使用这些功能，正确分配的个人百分比在阿德利岛为93.87％，在贝尔纳多·奥希金斯为88.09％，在加布里埃尔·冈萨雷斯·维德拉中为83.95％。研究的最南部的地区在形态上与其他地区差异最大，性别差异小。此外，我们还为Gentoo企鹅建立了通用功能，可用于从许多地方识别企鹅的性别。因此，分子生物学和生物统计学是区分Gentoo企鹅的有用技术。

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  • 来源
    《Polar biology》 |2013年第12期|1723-1734|共12页
  • 作者

    Paulina Valenzuela-Guerra; David Morales-Moraga; Daniel Gonzalez-Acuna; Juliana A. Vianna;

  • 作者单位

    Departamento de Ecosistemas y Medio Ambiente, Pontificia Universidad Catolica de Chile, Vicuna Mackenna 4860, Macul,Santiago, Chile;

    Departamento de Ecosistemas y Medio Ambiente, Pontificia Universidad Catolica de Chile, Vicuna Mackenna 4860, Macul,Santiago, Chile;

    Departamento de Ciencias Pecuarias, Facultad de CienciasVeterinarias, Universidad de Conception, Chilian, Chile;

    Departamento de Ecosistemas y Medio Ambiente, Pontificia Universidad Catolica de Chile, Vicuna Mackenna 4860, Macul,Santiago, Chile;

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  • 正文语种 eng
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  • 关键词

    Morphological variation; Molecular sexing; Discriminant functions; Gentoo penguin;

    机译：形态变化;分子性别鉴定;判别功能;巴布亚企鹅;

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