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Why Did the Population of the Olive Ridley Turtle Lepidochelys olivacea (Eschscholtz, 1829) Increase in Alas Purwo National Park’s Beach, East Java, Indonesia?
Russian Journal of Marine Biology ( IF 0.5 ) Pub Date : 2020-11-16 , DOI: 10.1134/s1063074020050065
Nia Kurniawan , Awang Gitayana

Abstract

From 1983 to 2018, in the Alas Purwo National Park (APNP) beach, the olive ridley sea turtle (Lepidochelys olivacea) nested population showed a significantly increasing number compared to the other three species using the same beach. One of the reasons is believed to be the success of conservation efforts (nest relocation and protected egg incubation) to produce a balanced hatchling sex ratio. However, a balanced sex ratio is only the first step in maintaining a good number of individuals in the population. We reviewed several other factors that also influenced the increase in the olive ridley population. The Olive Ridley as the shortest sea turtle species reaches maturity faster, so the population can grow in a shorter time compared to other species. The shortage of males in the olive ridley sea turtle population might not have a dangerous effect because, owing to the ocean current, they can mate with males from other populations. They are also highly polygamous and polyandrous, and have a high degree of genetic variation that helps them to be more adaptable to the changing environment. Lastly, the low illegal hunt rate for this species can also help the population to thrive.



中文翻译:

为什么在印度尼西亚东爪哇省的阿拉斯普沃国家公园的海滩上,橄榄色的雷德利乌龟Lepidochelys olivacea(Eschscholtz,1829年)的种群增加了?

摘要

从1983年到2018年,在阿拉斯普沃国家公园(APNP)海滩上,橄榄色的里德利海龟(Lepidochelys olivacea)与使用同一海滩的其他三个物种相比,嵌套种群的数量显着增加。人们认为原因之一是保护工作(巢巢移出和保护卵孵化)成功实现了平衡的孵化性别比。但是,平衡的性别比只是维持人口中大量个人的第一步。我们回顾了其他一些因素,这些因素也影响了橄榄色ridley种群的增长。作为最短的海龟物种,橄榄雷德利(Olive Ridley)的成熟速度更快,因此与其他物种相比,该种群的生长时间更短。橄榄色ridley海龟种群中雄性种群的短缺可能不会造成危险的影响,因为由于洋流,它们可以与其他种群的雄性交配。它们也是一夫多妻制和一夫多妻制,并且具有高度的遗传变异性,有助于它们更适应不断变化的环境。最后,该物种的低非法猎取率也可以帮助人口蓬勃发展。

更新日期:2020-11-16
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