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New Distributional Record of Hasselt’s Bamboo Shark Chiloscyllium hasseltii (Orectolobiformes: Hemiscylliidae) from Bangladesh Waters
Thalassas: An International Journal of Marine Sciences ( IF 0.7 ) Pub Date : 2020-07-10 , DOI: 10.1007/s41208-020-00237-5
Sujan Kumar Datta , Tonmoy Saha , Nusrat Jahan Sanzida , Sumaiya Ahmed , Md. Anwarul Azim Akhand , Md. Sagir Ahmed

A new record of Hasselt’s bamboo shark Chiloscyllium hasseltii (Orectolobiformes: Hemiscylliidae) has been confirmed from the St. Martin’s Island, the northeastern part of the Bay of Bengal of Bangladesh. Two male specimens were collected on 19th December 2018 from the coast of St. Martin’s Island as a bycatch of the local fishermen. The traditional morphometric method was applied for taxonomic identification which was further validated by a molecular approach based on partial cytochrome c oxidase subunit I (COI) sequences (DNA barcodes). The key characteristics of this species are the distance from first to second dorsal fin less than 9.3% of TL; first dorsal fin height less than 6.6% of TL and second dorsal fin height less than 5.8% of TL. The morphometric, meristic and DNA barcoding data thus confirmed the presence of C. hasseltii in Bangladesh. With this report a new shark species has been added in the treasure of the marine ichthyofaunal diversity of Bangladesh and also updates the geographical distribution range of this species.



中文翻译:

来自孟加拉国水域的哈瑟尔特竹鲨的新分布记录(哈氏梭状芽孢杆菌:Hemiscylliidae)

Hasselt的竹鲨Chiloscyllium hasseltii的新记录(Orectolobiformes:Hemiscylliidae)已从孟加拉湾孟加拉湾东北部的圣马丁岛得到证实。2018年12月19日,从圣马丁岛海岸采集了两个雄性标本作为当地渔民的副渔获物。传统的形态计量学方法用于分类学鉴定,并通过基于部分细胞色素C氧化酶亚基I(COI)序列(DNA条码)的分子方法进一步验证。该物种的主要特征是第一背鳍到第二背鳍的距离小于TL的9.3%。第一背鳍高度小于TL的6.6%,第二背鳍高度小于TL的5.8%。因此,形态学,meristic和DNA条形码数据证实了哈氏梭菌的存在在孟加拉国。通过此报告,孟加拉国海洋鱼鳞鱼类多样性宝藏中增加了一种新的鲨鱼物种,并更新了该物种的地理分布范围。

更新日期:2020-07-24
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