Quantitative aspects of the parasites of clingfish Sicyases sanguineus (Muller & Troshel, 1843) (Perciformes: Gobiesocidae) in the coastal area of Chorrillos, Lima, Peru

The fish Sicyases sanguineus (Muller & Troschel, 1843) lives in rocky intertidal coastal zone attached to rocks and under the influence of waves. It is found between Salaverry (Peru) to Punta Arenas (Chile). Between August and September 2009, 99 specimens of S. sanguineus were obtained from the Fisheries Terminal Chorrillos, Lima, Peru to assess its parasite fauna. Of the fish tested, 47 were females and 52 were males. The fish had a total length of 24.5 plus or minus 4.5 cm (11 cm to 35 cm). The parasite assemblage registered a higher percentage of endoparasites (83.3%) than ectoparasites. The mean parasite species richness was 1.05 plus or minus 1.4 (0 to 4). Twenty hosts showed no parasite (20.2%) and 79 hosts showed infection with at least one parasite (79.8%). The site of infection, prevalence, and mean abundance of the six parasite species found was: a copepod Acanthochondria sicyases (Kroyer, 1863) (gills and gill chamber, 63.63% and 2.33) and five trematods Proctoeces lintoni Siddiqui et Cable, 1960 (intestine, 9.1% and 0.18), Proctoeces sp. (intestine, 15.15% and 0.49), Helicometrina nimia (intestine, 4.04% and 0.05), Lecithastheridae sp. (intestine, 7.07% and 0.27) and Prosorhynchoides sp. (intestine, 6.06% and 10.67). The index of significant parasites showed that Prosorhynchoides sp. presented the highest prevalence. All parasites showed a contagious distribution. No relationship was found between host sex or length and prevalence and abundance of parasites, with the exception of A. sicyases.Original Abstract: Sicyases sanguineus (Muller & Troschel, 1843) es una especie ictica que vive en la zona litoral del intermareal rocoso adherido a las rocas y bajo la influencia del oleaje y presenta distribucion geografica de Salaverry (Peru) a Punta Arenas (Chile). Entre el mes de agosto y septiembre del 2009, 99 especimenes de S. sanguineus fueron obtenidos en el Terminal Pesquero de Chorrillos, Lima-Peru para la evaluacion de los aspectos cuantitativos de su parasitofauna. De los peces evaluados, 47 fueron hembras y 52 fueron machos. Los peces mostraron una longitud total promedio de 24,5 plus or minus 4,5 cm (11 cm a 35 cm). Los parasitos fueron colectados y cuantificados usando los procedimientos convencionales. El ensamblaje parasitario registro un mayor porcentaje de endoparasitos (83,3%) que de ectoparasitos. El promedio de la riqueza de especies de parasitos fue 1,05 plus or minus 1,4 (0 a 4). Veinte hospederos no presentaron ningun parasito (20