Tres metazoos parásitos de la cojinoba Seriolella violacea Guichenot (Pisces, Centrolophidae), Callao, Perú

A research of parasitefauna of 50 palm ruff Seriolella violacea Guichenot, 1816 from Ventanilla Fishmarket, Callao, Peru, between July and October 2001 and necropsied to study parasite infracommunities was conducted. Of the fishes collected, 21 were females and 29 males. Male showed a standard length between 21-95 cm (52.6 ± 24.9) and female between 18-96 cm (43.2 ± 21.1) and was not found differences between both sexes. 358 specimens of parasite were collected in total during all the survey, with a mean abundance of 7.2 ± 3.2 (2-18). The mean parasite species richness 1.2 (1-3) was not correlated with standard body length. All hosts were parasited. Forty-two hosts (84%) showed infection with 1 parasite species, and eight (16%) had 2 parasite species. Three parasite species: Paraeurysorchis sarmientoi (Tantaleán, 1974) (Monogenea) (Prevalence = 14%, mean Intensity = 1, mean abundance = 0.14), Neobothriocephalus aspinosus Mateo & Bullock, 1966 (Cestoda) (Prevalence = 100%; mean Intensity = 7.02, mean abundance = 7.02) and Lernanthropus trachuri (Brian, 1903) (Copepoda) (Prevalence = 2%, mean Intensity = 1, mean abundance = 0.02) were found. Neobothriocephalus aspinosus had an overdispersed distribution and was the dominant species. An effect of sex and standard length with prevalence and mean abundance of infection of P. sarmientoi and N. aspinosus were not found. Paraeurysorchis sarmientoi showed the most prevalence of infection in the second gill-arch. Finally, we included a complete list of all metazoan parasites of S. violacea reported from Peru.