First record of the Gloiopotes huttoni (Thomson, 1890) (Copepoda: Caligidae) parasitic on the swordfish Xiphias gladius along the southeast coast of India
Parasitic copepods infect a large number of fishes. In particular, the family Caligidae (Crustacea) comprises more than 450 species worldwide, some of which are harmful to cultured and wild fishes. Recently, we found a parasitic copepod on the host swordfish Xiphias gladius (Xiphidae) in the coastal waters of Parangipettai, southeast coast of India. It was identified as Gloiopotes huttoni by its morphological features, and it belongs to the family Caligidae (order Siphonostomatoida). The swordfish was highly infected with about 72 caligids on a single host. Both male and female forms of G. huttoni were colonized on the beak of the swordfish and distributed mostly along the upper and lower jaws of the host, with 42 and 30 copepod parasites, respectively. Most of the copepods were ovigerous, and more females than males were recorded. It is the first record of the occurrence of G. huttoni in India.
KeywordsGloiopotes Swordfish Copepods Caligidae Beak
The authors are grateful to the Department of Science and Technology (SB/SO/AS/063/2013), Govt. of India, New Delhi for providing financial assistance to carry out this research work.
D Karthick Rajan carried out the sample collection, processing and prepared the manuscript. S Ravichandran identified the species and revised the manuscript. BA Venmathi Maran contributed to confirmation of the species identity and editing the manuscript.
Compliance with ethical standards
Not applicable to this study. No experimental studies were carried out on the host fish X. gladius. The only action was to collect the copepod parasites G. huttoni from the host.
Conflict of interest
The authors declare that they have no conflict of interest.
- Dojiri M, Ho JS (2013) Systematics of the Caligidae, copepods parasitic on marine fishes. Crustac Monogr 18:1–448Google Scholar
- Froese R, Pauly D (2018) Fish base. http://www.fishbase.org. Retrieved 20 July 2018
- Ho JS, Lin CL (2004) Sea lice of Taiwan (Copepoda: Siphonostomatoida: Caligidae). The Sueichan Press, TaiwanGoogle Scholar
- Ho JS, Nagasawa K (2001) New records of parasitic Copepoda from the offshore pelagic fishes of Japan. Bull Nat Res Inst Far Seas Fish 38:1–5Google Scholar
- Johnson SC, Treasurer JW, Bravo S, Nagasawa K, Kabata Z (2004) A review of the impact of parasitic copepods on marine aquaculture. Zool Stud 43:229–243Google Scholar
- Pillai NK (1985) The fauna of India. Copepod parasites of marine fishes. Zoological Society of India, CalcuttaGoogle Scholar
- Rao TS, Satyanarayana (1951) On a new caligid parasite, Gloiopotes zeugopteri, sp. nov., from Xiphias zeugopteri, Lawson’s Bay, Waltair. Proc Indian Acad Sci B 34(5):248–255Google Scholar
- Venmathi Maran BA, Leong TS, Ohtsuka S, Nagasawa K (2009) Records of Caligus (Crustacea: Copepoda: Caligidae) from marine fish cultured in floating cages in Malaysia with a redescription of male Caligus longipedis Bassett-Smith, 1898. Zool Stud 48:797–807Google Scholar
- Yamaguti S (1963) Parasitic Copepoda and Branchiura of fishes. Inter-Science Publishers, New YorkGoogle Scholar