Trematodos en Hoplerythrinus unitaeniatus (Erythrinidae) «Shuyo» y Pterodoras granulosus (Doradidae) «Cahuara» del Distrito de Yurimaguas, Provincia Alto Amazonas, Loreto, Perú

Abstract

RESUMENSe analizaron cinco especímenes de Hoplerythrinus unitaeniatus «shuyo» (Erythrinidae) y uno de Pterodoras granulosus «cahuara» (Doradidae) del distrito de Yurimaguas, Alto Amazonas, Región Loreto (Perú) en febrero de 2014. Se encontró una larva del trematodo Ithyoclinostomum dimorphum y 13 de Sphincterodiplostomum musculosum en H. unitaeniatus en la superficie visceral y 18 adultos de Dadaytrema oxycephala en el intestino de P. granulosus. Se registran por primera vez para el Perú las metacercarias de I. dimorphum y S. musculosum. H. unitaeniatus es un nuevo hospedero para S. musculosum. Se da a conocer a D. oxycephala en P. granulosus en el Perú.Palabras clave: Ithyoclinostomum dimorphum, Sphincterodiplostomum musculosum, Dadaytrema oxycephala, trematoda, shuyo, cahuara, Perú ABSTRACTFive specimens of Hoplerythrinus unitaeniatus «shuyo» (Erythrinidae) and one of Pterodoras. granulosus «cahuara» (Doradidae) were assessed in Yurimaguas district, Alto Amazonas, Loreto, Peru in February 20014. A larva of the trematode Ithyoclinostomum dimorphum and 13 larvae of Sphincterodiplostomum musculosum in H. unitaeniatus in

Morphological and molecular characterization of an enigmatic clinostomid trematode (Digenea: Clinostomidae) parasitic as metacercariae in the body cavity of freshwater fishes (Cichlidae) across Middle America

“…(2013) found them encysted in the visceral cavity of their hosts in Minas Gerais, Brazil. In contrast, some authors have reported metacercariae of I. dimorphum from the mesentery/musculature, coelomic cavity/stomach, and body cavity of their fish hosts, although none of them mentioned specifically whether or not the metacarcariae were encysted (Benigno et al ., 2014; Costa et al ., 2015; Delgado et al , 2017). In our study, the metacercariae of Ithyoclinostomum sp.…”

“…Furthermore, geographical distribution and host specificity patterns were also used to differentiate I. dimorphum from the specimens sampled in this study. The metacercariae of I. dimorphum show a strong host specificity, having been reported only from three species of Characiform fishes (Family Erythrinidae Valenciennes, 1847): Hoplias malabaricus Bloch, 1794, Hoplias intermedius (Günther, 1864) and Hoplerytrinus unitaeniatus (Spix & Agassiz, 1829) in Brazil, Peru and Argentina (Szidat, 1969; Travassos et al , 1969; Pavanelli et al ., 1990; Weiblen & Brandão, 1992; Paraguassú & Luque, 2007; Gallio et al ., 2007; Belei et al ., 2013; Benigno et al ., 2014; Costa et al , 2015; Delgado et al ., 2017). The species has also been found as a parasite of Schizodon borrelli (Boulenger, 1900) in the Paraná River, Brazil (Machado et al ., 1996), a member of the Anostomidae Günther, 1864.…”

Phylogenetic position of Sphincterodiplostomum Dubois, 1936 (Digenea: Diplostomoidea) with description of a second species from Pantanal, Brazil

“…The complete life cycle of S. musculosum has not been demonstrated; however, S. musculosum is known to utilize a wide diversity of fish as second intermediate hosts, and has been previously collected from avian definitive hosts (e.g. Dubois, 1936; Lunaschi & Drago, 2006; Rocha et al ., 2015; Delgado et al ., 2017). Adult S. musculosum have been rarely collected (e.g.…”

“…Lunaschi & Drago, 2006), whereas metacercariae have been reported in several studies of Neotropical fish helminths (e.g. Szidat, 1969; Zago et al ., 2013; Rocha et al ., 2015; Delgado et al ., 2017). To date, no DNA sequence data have been published for S. musculosum .…”

Growing of cacao seedlings (Theobroma cacao) in the nursery, using different volumes of substrate

“…El estudio se realizó en el vivero de la Estación Experimental Agraria (EEA) San Ramón, ubicado a una distancia aproximado de 3,5 km de la carretera Yurimaguas-río Shanusi, con coordenadas 5°56'13'' LS y 76°07'04'' LO y altitud de 182 m.s.n.m. El clima está clasificado como húmedo tropical (Holdridge, 1967) con una temperatura anual 26,1 °C y un promedio de precipitación pluvial de 2200 mm/año (Amasifuen, 2001;Delgado, 2017), con periodos de lluvias (setiembre -mayo) y periodos de seco (junio -agosto). Para la colecta del material genético fueron seleccionados aquellas mazorcas que presentaron buen estado sanitario y fueron seleccionados de la parte baja de la planta madre con el fin de que se obtengan semillas de calidad.…”