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首页> 外文期刊>Polar biology >Morphological versus molecular identification of Sooty (Phoebetria fused) and Light-mantled (P. palpebrata) albatross chicks
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Morphological versus molecular identification of Sooty (Phoebetria fused) and Light-mantled (P. palpebrata) albatross chicks

机译：煤烟（Phoebetria融合）和轻斗（P. palpebrata）信天翁雏鸡的形态学与分子鉴定

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摘要

The two fuliginous albatross species, Phoebetria fusca (the Sooty albatross, SA) and P. palpebrata (the Light-mantled albatross, LMA), are found breeding close to each other on the Prince Edward Islands (Southern Ocean). Adults of these two species are easy to identify in the field, but the chicks are difficult to distinguish on the basis of external morphology, especially at very young ages. Many ecological studies involve sampling of chicks as well as adults, and accurate field identification of chicks is thus crucial. Traditionally, the extent of the ring of pale feathers around the eye (eye-ring) has been used to identify the fledglings. The aim of our study was to investigate the utility of characters associated with the eye-ring (extent, measured as an angle, and colour) for the identification of Phoebetria chicks. This was achieved by comparison of identifications based on morphology, with positive identifications based on DNA sequence data from the mitochon-drial cytochrome b gene. We confirm the value of morphological criteria in distinguishing LMA and SA chicks, and this technique appears to be accurate in the majority of cases (>80%). However, we recommend using molecular identification for borderline cases (angle of the eye-ring measuring between 85 and 95°) if independent confirmation of chick identity cannot be obtained (e.g. via observed feeding interaction with an adult).
机译：在爱德华王子岛（南大洋）上发现了两个黄粉信天翁物种，Phoebetria fusca（南烟碱信天翁，SA）和P. palpebrata（光罩信天翁，LMA）繁殖。这两种物种的成虫在田间很容易辨认，但是雏鸡很难根据外部形态来区分，特别是在很小的时候。许多生态学研究都涉及对小鸡以及成年鸡的采样，因此准确识别小鸡至关重要。传统上，眼睛周围的淡淡羽毛环（眼环）的范围已用于识别雏鸟。我们研究的目的是研究与眼环相关的字符（范围，角度和颜色）的实用性，以鉴定腓尼基小鸡。通过比较基于形态学的鉴定与基于线粒体细胞色素b基因DNA序列数据的阳性鉴定，可以实现这一点。我们确认了形态学标准在区分LMA和SA小鸡方面的价值，并且这种技术在大多数情况下（> 80％）似乎是准确的。但是，如果无法获得独立的雏鸡身份确认（例如，通过观察与成年的喂养互动），我们建议对边缘病例（眼圈角度在85至95°之间）进行分子鉴定。

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