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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Helmintofauna de Scartichthys gigas (Steindachner 1876) "Borracho" del terminal pesquero de Chorrillos, Lima, Perú

Tarmeño Rojas, Nicolás Jonathan Jesús January 2015 (has links)
Durante los meses de junio del 2013 hasta marzo de 2014 fueron colectados 215 ejemplares de Scartychtis gigas, 147 machos y 68 hembras, procedentes de la pesca artesanal en el Terminal Pesquero de Chorrillos, Lima, Perú, con el fin de estudiar la diversidad de helmintos parásitos y la relación con el sexo, peso y talla de los peces. En total fueron colectados 7979 helmintos comprendidos en seis especies de helmintos parásitos: los digeneos Zoogonus dextrocirrus, Lepocreadium pegorchis, Metamegasolena sp; estadios larvarios del nemátodo Proleptus sp, Pseudodelphis n. sp y cistacantos del acantocefalo Corynosoma obtuscens. De los 215 peces colectados, el 1,86% resultó negativo a parásitos (4 de 215), el 31,16% (67 de 215) estuvieron infectados por sólo una especie de parásito y el 66,98% (144 de 215) presentó infección múltiple en donde el biparasitismo predominó (66 de 215). Las hembras con tallas entre 16,6cm y 17,4cm y pesos entre los 61gr y 69gr presentaron la mayor frecuencia parasitaria. Los machos con tallas entre los 18,4cm y 19,2cm, y pesos entre 79gr y 87gr presentaron la mayor frecuencia parasitaria. En las estaciones de invierno, primavera y verano se presentó la mayor riqueza de especies, en la primavera se colectó la mayor cantidad de especies parásitas. / During the months of June 2013 to March 2014, were collected 215 specimens of Scartychtis gigas, 147 males and 68, females, from artisanal fisheries in Terminal Pesquero de Chorrillos, Lima, Peru, to study the diversity of helminth parasites and relationship with sex, weight and size of fish. Were collected 7979 helminths, six species of parasitic helminths: digeneans Zoogonus dextrocirrus, Lepocreadium pegorchis, Metamegasolena sp; larval stages of nematode Proleptus sp, Pseudodelphis n. sp and cistacants of acanthocephalan Corynosoma obtuscens. Of the 215 hosts, 1.86% had no parasite (4 of 215), the 31,16% (67 of 215) were infected with only one species of parasite and 66.98% (144 of 215) presented multiple infection where biparasitism predominated (66 of 215). Females with sizes between 16.6cm and 17.4cm and weights between 61gr and 69gr showed the highest frequency parasitic. Males with lengths between 18.4cm and 19,2cm and weights between 79gr and 87gr showed the highest frequency parasitic. Winter, spring and summer were the seasons that had the highest species richness, spring was the one that had the highest amount of collected parasites. Key words: Helmintofauna; Scartichthys; Zoogonus; Lepocreadium; Metamegasolena; Pseudodelphis

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