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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Utility of carapace images for long-term photographic identification of nesting green turtles
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Utility of carapace images for long-term photographic identification of nesting green turtles

机译：甲壳图像的实用性嵌套绿色龟的长期摄影识别

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摘要

The accurate identification of wildlife is necessary for biological research and population monitoring. In sea turtles, artificial tags have commonly been used for individual identification, but tagging has low long-term reliability because of inherent problems such as tag loss and the stress caused by invasive tagging. Photographic identification (Photo-ID) has been increasingly used as an alternative to tagging. Mostly, facial scute patterns have been used as Photo-ID means for sea turtles; however, for Photo-ID of turtles on nesting beaches, there is a risk of disturbing individuals when attempting to access the head region and capture the entire face. Thus, here, we focused on the posterior part of the carapace (fifth vertebral scute), which can be photographed more easily and less invasively, as a useful natural marker for the identification of nesting green turtles (Chelonia mydas). To establish the utility of the carapace for individual identification, we used photographs (167 images from 77 individuals) collected in a nesting survey conducted over 28 years at Ishigaki Island, Japan, and verified the long-term identifiability of carapace. We initially matched individual turtle images with the HotSpotter program to assess the automated recognition of images, and then conducted a blind test to visually validate the results of automated recognition. High matching accuracy was achieved, especially within the same nesting season (98.1%; 52 out of 53 queries), and logistic regression indicated that the matching accuracy was over 70% when the photographing interval was = 4 years, which is longer than the mean remigration interval for nesting green turtles on Ishigaki Island. In the blind test of visual identification, 95.4% of the image pairs were correctly judged (as those of the same individual or different individuals). These results show that a query image can be successfully identified in the database even if automated matching to the same individual fails or if the query is taken from a newly recruited individual. This study shows the long-term identifiability of nesting green turtles using carapace photographs and proposes a practical Photo-ID method that is conducive to citizen science.
机译：生物学研究和人口监测是必要的野生动物准确识别。在海龟中，人造标签通常用于个别识别，但标记具有低的长期可靠性，因为诸如标签损失等固有问题，并且由侵入性标记引起的应力。摄影识别（Photo-ID）越来越多地用作标记的替代品。大多数情况下，面部鳞片样式被用作海龟的照片ID手段;然而，对于嵌套海滩上的海龟的照片ID，在尝试进入头部区域并捕获整个面部时，存在扰乱个人的风险。因此，这里，我们专注于甲壳（第五椎弓根）的后部，其可以更容易且较少侵入地拍摄，作为用于鉴定嵌套绿色乌龟（Chelonia mydas）的有用天然标记。为了建立甲壳的储蓄，为个人身份证明，我们在筑巢调查中使用的照片（167张图片来自77个个人）在伊希加岛，日本在28年来，并验证了甲壳的长期可识别性。我们最初将单独的乌龟图像与热点程序相匹配，以评估图像的自动识别，然后进行盲检测以在视觉上验证自动识别的结果。实现了高匹配的准确性，特别是在相同的巢季（98.1％; 53个查询中的52个），并且逻辑回归指示拍摄间隔的匹配准确度超过70％，而= 4年，这比ISHigaki Island嵌套绿色乌龟的平均登记间隔。在视觉识别的盲试验中，正确判断了95.4％的图像对（作为同一个体或不同个体的图像对）。这些结果表明，即使对同一个人的自动匹配失败或从新招募的个人拍摄，也可以在数据库中成功识别查询图像。本研究显示了使用甲壳照片嵌套绿色乌龟的长期可辨性，并提出了一种有利于公民科学的实用照片ID方法。

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