Abstract The status of elasmobranchs in Southeast Asia has been highlighted as a serious concern, yet there are limited data to assess stocks and develop appropriate management plans. Surveys of elasmobranchs at two fishery ports in Singapore were conducted between 2017 and 2020. These fishery ports receive fresh, whole imports of seafood from the region as well as seafood caught in Singapore waters. Data were collected on 13,817 rays, 2,480 sharks, and 1,297 wedgefishes and giant guitarfishes over 102 surveys. The majority of elasmobranchs were imported from Indonesia or Malaysia, and only a few individuals (six sharks and 278 rays) were reportedly caught within Singapore waters. In Singapore, elasmobranchs are predominantly used for their meat, and wedgefish snouts are also commonly used in collagen soup. The data collected highlights potential conservation concerns, particularly surrounding the large volumes of Maculabatis gerrardi and Maculabatis macrura rays (categorized as Vulnerable and Not Assessed by the IUCN) that are imported, and the high proportions of immature individuals of Carcharhinus sorrah and Carcharhinus sealei sharks. During this study, a single Rhynchobatus cooki was discovered – the first reported sighting in over 20 years.

中文翻译：

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新加坡渔港的鲨鱼和鳐鱼

摘要 东南亚弹鳃类动物的状况已被强调为一个严重问题，但用于评估种群和制定适当管理计划的数据有限。2017 年至 2020 年期间，对新加坡两个渔港的软骨鱼类进行了调查。这些渔港接收从该地区进口的新鲜、完整的海产品以及在新加坡水域捕获的海产品。通过 102 次调查收集了 13,817 条鳐鱼、2,480 条鲨鱼以及 1,297 条楔鱼和巨型吉他鱼的数据。大多数 elasmobranch 是从印度尼西亚或马来西亚进口的，据报道只有少数人（6 条鲨鱼和 278 条鳐鱼）在新加坡水域捕获。在新加坡，软骨鱼主要用于制作它们的肉，楔形鱼的鼻子也常用于制作胶原蛋白汤。收集的数据突出了潜在的保护问题，特别是围绕进口的大量 Maculabatis gerrardi 和 Maculabatis macuraray（被归类为易危且未由 IUCN 评估）以及 Carcharhinus sorrah 和 Carcharhinus seaei 鲨鱼未成熟个体的高比例。在这项研究中，发现了一个 Rhynchobatus cooki——这是 20 多年来首次报道的目击事件。