Shamsa Al Hameli, Stephan Bruns, Aaron C. Henderson
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引用次数: 0
摘要
摘要：巴基斯坦鞭鱼（Maculabatis arabica）和哈拉维吉他鱼（Glaucostegus halavi）是印度洋北部地区特有的极度濒危鞘鳃类物种。本文描述了这两个物种在阿拉伯联合酋长国阿布扎比近岸浅海区域出人意料的高丰度。尽管丰度的季节性波动很明显，但发现这两个物种全年都在这一区域活动。雄性和雌性 G. halavi 的个体大小表明，未成熟个体和成熟个体混杂在一起；然而，除 1 条 M. arabica 外，其余均为雌性，这表明该物种存在性分离现象。要进一步了解研究区域在这些极度濒危物种生活史中的重要性，还需要进一步的研究，但令人相当担忧的是，更广泛的霍尔法里达地区目前正在进行密集的沿海开发。
Notable abundance of two Critically Endangered elasmobranch fishes near an area of intensive coastal development in the Arabian Gulf
ABSTRACT: The Pakistan whipray Maculabatis arabica and the halavi guitarfish Glaucostegus halavi are Critically Endangered elasmobranch species that are endemic to areas of the northern Indian Ocean. An unexpectedly high abundance of both species in a shallow, nearshore area of Abu Dhabi, United Arab Emirates, is described here. Both species were found to utilise this area year-round, although seasonal fluctuations in abundance were evident. Male and female G. halavi were encountered at sizes that suggest a mix of immature and mature individuals; however, all except 1 M. arabica were female, indicating sexual segregation in this species. Further studies are required to learn more about the importance of the study area in the life history of these Critically Endangered species, but it is a matter of considerable concern that the wider Khor Faridah area is currently undergoing intensive coastal development.
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