The genus Trachinocephalus (Aulopiformes: Synodontidae) was considered to be monotypic and nearly circumtropical in distribution, with single species, Trachinocephalus myops (Forster 1801). However, a revision indicated presence of at least three species under the genus – the Atlantic T. myops, the Indo-Pacific T. trachinus, a new species T. gauguini and later again a new species T. atrisignis added from Western Indian Ocean. Even though, two species are known from Indian Ocean, the species found in India is still being misidentified as T. myops. Thus, to confirm the species inhabiting in Indian waters, the samples were collected from multiple locations along the west (Arabian Sea) and east (Bay of Bengal) coasts of India. The recorded morpho-meristic characters were found to be substantially overlapping between T. myops and T. trachinus. Further, molecular analysis based on COI gene of mitochondrial DNA confirms the presence of more than four species in the world and the species distributed along the Indian coast as T. trachinus. The genetic distance estimated between T. trachinus and T. myops was found to be 16.9%, which is sufficient to separate the two species. Though, massive genetic divergence was observed, the species exhibited phenotypic stasis that can be the reason for misidentification. In recognition of the critical role of correct taxonomic identification in species conservation and management, an integrated taxonomic study was carried out on Trachinocephalus genus along the Indian coast.
ICAR-CIFE, MUMBAI
The authors are grateful to Dr. Ravishankar C.N – the Director, ICAR-CIFE, Mumbai, for providing vital facilities and continuous assistance throughout the study. Special appreciation is also owed to Dr. Md Sadegh Alavi-Yeganeh from Tarbiat Modares University, Iran, for sharing the sequence from his research, as well as to Dr. Akhilesh K.V. from Calicut Regional Station of ICAR-CMFRI, for his helping hand in sample collection.
Primary Language | English |
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Subjects | Fisheries Management |
Journal Section | Research Article |
Authors | |
Publication Date | September 28, 2023 |
Submission Date | May 25, 2023 |
Acceptance Date | July 31, 2023 |
Published in Issue | Year 2023 Volume: 12 Issue: 3 |