Registro de Gloiopotes huttoni (Thomson, 1890) (Siphonostomatoida: Copepoda), parásito del merlín rayado Kajikia audax (Philippi, 1887) capturado frente al Callao, Perú

Angelo Nizama Chapoñan; Ángel Perea de la Matta; Pedro Berrú Paz

doi:10.53554/boletin.v39i2.420

Authors

Angelo Nizama Chapoñan Instituto del Mar del Perú, Programa observadores a bordo bitácoras de Pesca, Chimbote, Perú. https://orcid.org/0000-0001-5841-3834
Ángel Perea de la Matta Instituto del Mar del Perú, Laboratorio Costero de Chimbote, Perú. https://orcid.org/0000-0001-6615-8802
Pedro Berrú Paz Instituto del Mar del Perú, Laboratorio Costero de Chimbote, Perú. https://orcid.org/0000-0002-0019-3995

DOI:

https://doi.org/10.53554/boletin.v39i2.420

Keywords:

parasite, Caligidae, Gloiopotes huttoni, Kajikia audax, Peru

Abstract

The parasitic copepod Gloiopotes huttoni was found on a Kajikia audax specimen that was incidentally caught by the anchoveta industrial fishing fleet 51 nm off Callao (12°11’941"S - 77°58’387"W) in November 2023. The Kajikia audax individual measured 182 cm in length (eye to fork), and several environmental factors, including sea surface temperature and capture depth, were recorded. The parasite was collected from the ventral surface of the skin, between the first and second anal fins. A total of 53 specimens of G. huttoni were found, consisting of 32 females (10.73–12.97 mm total length [TL]) and 21 males (10.14–11.58 mm TL). Fresh specimens were purple, while preserved ones turned a creamy shade. The key taxonomic features identifying G. huttoni were the shape of the genital segment (longer than wide) and the location of the fifth pereiopod (which does not extend to the end of the abdomen). This species is known to parasitize large pelagic fish and is specific to billfishes in the Indian and Pacific Oceans. This scientific note represents only the second record (after 56 years) of G. huttoni as an ectoparasite of K. audax off the Peruvian coast, caught off Callao.

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