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- W44335724 abstract "espanolEl borrachito Scartichthys gigas (Steindachner, 1876) (Blenniidae) es una especie endemica del Pacifico Sur-Oriental y abundante en los ambientes intermareales rocosos. Se investigaron algunos indices ecologicos de la parasitofauna de 72 S. gigas adquiridos del Terminal Pesquero de Chorrillos, Lima, Peru entre septiembre del 2008 hasta agosto del 2009. Necropsiamos los peces para censar los helmintos y crustaceos parasitos. Se encontraron cuatro parasitos con la siguiente prevalencia y abundancia media, respectivamente: un isopodo Ceratothoa gaudichaudii (H. Milne Edwards, 1840) (1,4% y 0,01), un copepodo Acanthocondria syciasis (Kroyer, 1863) (55,6% y 1,56), un digeneo Zoogonus rubellus (Olson, 1868) (26,4% y 0,26), un nematodo Johnstonmawsonia sp. (6,9% y 0,17). Solo se observo correlacion lineal entre la talla del pez hospedero, y la prevalencia y abundancia total de Z. rubellus. La talla se encontro relacionada con el numero de especies parasitas de S. gigas. Se vio ausencia de dependencia entre el sexo de S. gigas y la abundancia media y prevalencia de infeccion de los parasitos. Al analizarse ocho indices de agregacion: Z. rubellus mostro que tres indices mostraron una distribucion aleatoria (Dispersion, Morisita estandarizado y Discrepancia de Poulin), otros cuatro uniforme (Morisita, Green, agregacion media de Lloyd y de Patchiness) y con el Coeficiente K de la binomial ningun patron especifico, encontrandose divergencia en el tipo de distribucion segun el indice empleado. En cambio, para A. syciasis, los ocho indices de agregacion senalaron una distribucion sobredispersa con una total congruencia entre si. La diversidad del componente comunitario parasitario de S. gigas fue Shannon-Wienner (H´) = 0,31, indice de Pielou (J) = 0,50, indice de Simpson (C) = 0,62 e indice de Berger-Parker = 0,77. EnglishThe giant blenny, Scartichthys gigas (Steindachner, 1876) (Blenniidae), is endemic to the eastern South Pacific and abundant in rocky intertidal environments. We investigated some ecological indices of the parasitefauna of 72 S. gigas acquired at Fishing Terminal from Chorrillos, Lima, Peru from September 2008 to August 2009. Fish were necropsied to census helminth and crustacean parasites. Four species of parasites were found with the following prevalence and mean abundance, respectively: an isopod, Ceratothoa gaudichaudii (H. Milne Edwards, 1840) (1.4% and 0.01), a copepod, Acanthocondria syciasis (Kroyer, 1863) (55.6 and 1.56), a digenean, Zoogonus rubellus (Olson, 1868) (26.4% and 0.26), a nematode, Johnstonmawsonia sp., (6.9 % and 0.17). Only linear correlation was observed between the size of host fish, and the prevalence and total abundance of Z. rubellus. Similarly, the size was found to be related to the number of parasite species of S. gigas. We found no dependence between the sex of S. gigas and mean abundance and prevalence of infection of the most prevalent parasites. Analysis of eight indices of aggregation: Z. rubellus showed that three indexes showed a random distribution (Dispersion, Morisita standardized and Discrepancy of Poulin), four uniforms (Morisita, Green, average aggregation of Lloyd and patchiness) and the binomial coefficient K without a specific pattern. Divergences in the type of distribution were found depending on the index used. In contrast in A. syciasis, eight aggregation indices indicated an aggregated distribution and total congruence with each other. The diversity of the parasite community component of S. gigas was H '= 0.31, Pielou index (J) = 0.50, the index of Simpson (C) = 0.62 and Berger-Parker index was 0.77." @default.
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- W44335724 date "2012-01-01" @default.
- W44335724 modified "2023-09-24" @default.
- W44335724 title "Ecological indices of parasites of Scartichthys gigas (Steindachner, 1876) (Perciformes: Blenniidae) of the coasts of Lima, Peru." @default.
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