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      Metazoos parásitos de la mojarrilla Stellifer minor (Tschudi) (Osteichthyes, Sciaenidae) capturados por pesquería artesanal en Chorrillos, Lima, Perú Translated title: Metazoan parasites of the minor stardrum, Stellifer minor (Tschudi) (Osteichthyes, Sciaenidae), caught by artisanal fishery on Chorrillos, Lima, Peru

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          Abstract

          Se investigaron algunos componentes comunitarios de la parasitofauna de 105 ejemplares de Stellifer minor (Tschudi, 1844) colectados del Terminal Pesquero de Chorrillos, Lima, Perú, entre el mayo y octubre de 1998 y necropsiados para estudiar sus comunidades parasitarias. De los peces colectados, 71 fueron machos y 34 hembras. Los peces mostraron una longitud estándar entre 10,20-20,50 cm (promedio = 15,50 ± 1,65). Los parásitos metazoos fueron colectados y censados empleando las técnicas convencionales. Se colectaron un total de 3483 especimenes durante todo el muestreo, con una abundancia media total de 33,17 (3-122). El promedio de la riqueza de especies de parásitos fue 1,9 (1-4). Un hospedero no presentó ningún parásito. 20 hospederos (19,04%) mostraron infección con un solo parásito, 77 (73,33%) y 7 (6,66%) tuvieron una infección múltiple, con 2 y 3 especies de parásitos, respectivamente. Se encontraron cinco parásitos: Rhamnocercus oliveri Luque & Iannacone, 1991 y R. stelliferi Luque & Iannacone, 1991 (Monogenea) (prevalencia = 98,09%; intensidad media = 28,85; abundancia media = 28,58), Clavellotis dilatata (Kroyer, 1863) (Copepoda) (prevalencia = 2,85%; intensidad media = 1; abundancia media = 0,02), Helicometra fasciata (Rudolphi, 1819) (Digenea) (prevalencia = 79,04%; intensidad media = 5,77; abundancia media = 4,56) y Procamallanus (Spirocamallanus) pereirai Annereaux, 1946 (Nematoda) (prevalencia = 4,76%; intensidad media = 1,6; abundancia media = 0,07). Se encontró efecto del sexo en la intensidad y abundancia media de Infección de Rhamnocercus Monaco, Wood & Mizelle, 1954 y también efecto del sexo con la abundancia media de infección con H. fasciata. La diversidad media de las infracomunidades según el índice de Shannon-Weaver de S. minor fue (H') = 0,11 y el índice de Simpson (C) = 0,98. Se compararon los resultados obtenidos con la estructura comunitaria parasitaria registrada en la década anterior en S. minor en la misma localidad.

          Translated abstract

          A research on some community components of parasitefauna of 105 specimens of Stellifer minor (Tschudi, 1844) collected from Chorrillos Fishmarket, Lima, Peru, between May and October 1998 and necropsied to study parasite communities was conducted. Of the fishes collected, 71 were males and 34 females. Fishes showed a standard length between 10.20 and 20.50 cm (mean = 15.50 ± 1.65). Metazoan parasites were collected and counted employing conventional techniques. 3483 specimens in total during all the survey, with a mean abundance of 33.17 (3-122) were collected. The mean parasite species richness was 1.9 (1-4). One host was not parasited. Twenty hosts (19.04%) showed infection with one parasite species, and seventy-seven (73.33%) and seven (6.66%) had multiple infection, two and three parasite species, respectively. Five parasites: Rhamnocercus oliveri Luque & Iannacone, 1991 and R. stelliferi Luque & Iannacone, 1991 (Monogenea) (prevalence = 98.09%; mean intensity = 28.85; mean abundance = 28.58), Clavellotis dilatata (Kroyer, 1863) (Copepoda) (prevalence = 2.85%; mean intensity = 1; mean abundance = 0.02), Helicometra fasciata (Rudolphi, 1819) (Digenea) (prevalence = 79.04%; mean intensity = 5.66; mean abundance = 4.47) and Procamallanus (Spirocamallanus) pereirai Annereaux, 1946 (Nematoda) (prevalence = 4.76%; mean intensity = 1.6; mean abundance = 0.07) were found. Effect of the sex on mean intensity and abundance of Infection of Rhamnocercus Monaco, Wood & Mizelle, 1954 and also effect of sex with mean abundance of infection with H. fasciata were found. The mean diversity in the infracommunities of S. minor was (H') = 0.11 and Simpson Index (C) = 0.98. Finally, the results of community assemblages with the parasite communities registered on S. minor ten years ago in the same locality of study were compared.

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          Biotatistical analysis

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            Parasitology meets ecology on its own terms: Margolis et al. revisited

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              The metazoan parasites of Stellifer minor (Tschudi, 1844): an ecological approach

              A quantitative and qualitative analysis of the parasite fauna of the sciaenid Stellifer minor (Tschudi) from Chorrillos, Peru, was made. Some characteristics of the infectious processes, in terms of intensity and prevalence of infection, as a function of host sex and size, are given. Moreover, comments on the characteristics of the parasite fauna, related with host role in the marine food webs are included. The parasite fauna of Stellifer minor taken of Chorrillos, Peru, include the monogeneans Pedocotyle annakohni, Pedocotyle bravoi, Rhamnocercus sp. and Cynoscionicola sp., the digenean Helicometra fasciata, the adult acantocephalan Rhadinorhynchus sp. and the larval Corynosoma sp., the nematode Procamallanus sp., the copepods Caligus quadratus, Clavellotis dilatata and Bomolochus peruensis and one unidentified isopod of the family Cymothoidae. A distinctive characteristic of the parasite fauna (Metazoa) of S. minor is the almost absence of larval forms.
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                Author and article information

                Contributors
                Role: ND
                Journal
                rbzool
                Revista Brasileira de Zoologia
                Rev. Bras. Zool.
                Sociedade Brasileira de Zoologia (Curitiba )
                0101-8175
                December 2004
                : 21
                : 4
                : 815-820
                Affiliations
                [1 ] Universidad Nacional Federico Villarreal Peru
                Article
                S0101-81752004000400015
                10.1590/S0101-81752004000400015
                5cf78639-761e-4708-bbfd-b7e1061272cb

                http://creativecommons.org/licenses/by/4.0/

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                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0101-8175&lng=en
                Categories
                ZOOLOGY

                Animal science & Zoology
                Clavellotis,Helicometra,parasite communities,parasites,Procamallanus,Rhamnocercus,comunidad parasitaria,parásitos

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