New Geographical Record of the Rainbow Runner, Elagatis bipinnulata (Quoy & Gaimard, 1825) (Perciformes: Carangidae)
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New Geographical Record of the Rainbow Runner, Elagatis bipinnulata (Quoy & Gaimard, 1825) (Perciformes: Carangidae) from the Bay of Bengal, Bangladesh Tonmoy Saha 1 & Sujan Kumar Datta 1 & Ayesha Akhter Zhilik 2 & Nishat Zahan Chowdhury 2 & Mohammad Abdul Baki 1 & Md. Sagir Ahmed 2 Received: 21 November 2019 / Revised: 5 October 2020 / Accepted: 19 October 2020 # Springer Nature Switzerland AG 2020
Abstract This paper describes the first record of the rainbow runner Elagatis bipinnulata (Perciformes: Carangidae) from Cox’s Bazar, the North eastern part of Bay of Bengal, Bangladesh. Two specimens of E. bipinnulata ware collected on 23 June 2018 from the Bangladesh Fisheries Development Corporation Fish Landing Center of Cox’s Bazar. Morphometric and molecular approaches were applied for identification. Dorsal and anal fins with terminal two rayed finlet, absence of scute, upper jaw ending distinctly before vertical at front margin of eye are the key characteristics to this species. Six spines in first dorsal fin and (24 + 2) fin rays in second dorsal fin; (17 + 2) anal fin rays with one spine present. The morphometric, meristic and molecular analyses thus confirmed the presence of E. bipinnulata in Bangladesh. This report updates the geographical distribution for this species confirming its presence in the coastal region of Bangladesh, and extends the number of marine fish known from the area. Keywords Elagatis bipinnulata . Rainbow runner . Bay of Bengal . New record . COI gene
Abbreviations COI Mitochondrial Cytochrome c Oxidase Subunit 1 DNA Deoxyribonucleic Acid PCR Polymerase Chain Reaction NCBI National Center for Biotechnology Information
Introduction Marine and coastal waters of Bangladesh are rich in ichthyofaunal diversity. There is a record of over 450 species of fin fish including sharks and rays (Rahman et al. 2009). The family Carangidae, known as Jacks or pompanos, are globally distributed in the tropical and subtropical oceans with 140 species placed in 32 genera (Nelson et al. 2016). About 29 species of carangid were reported from Bangladesh waters (Rahman et al. 2009). The rainbow runner E. bipinnulata is * Md. Sagir Ahmed [email protected] 1
Department of Zoology, Jagannath University, Dhaka 1100, Bangladesh
2
Department of Zoology, University of Dhaka, Dhaka 1000, Bangladesh
the only member of the genus Elagatis distributed in the circumtropical oceans all around the world (Sun et al. 2018). It is a pelagic fish, normally found near the surface, over reefs, or occasionally over the islands slope (Pinheiro et al. 2011). There are also sometimes reported offshore area as sizeable school. On 23 June 2018, two specimens of E. bipinnulata were captured from Cox’s Bazar. The present study reports the occurrence of E. bipinnulata from the coastal area of the Bay of Bengal, Bangladesh. The presence of E. bipinnulata was confirmed based on morphometric and molecular (DNA barcoding) approaches.
Material and Methods Sampling and Morphological Analysis Two specimens of E. bipinnulata were collected on
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