New records of Contracaecum sp. (NEMATODA:ANISAKIDAE) in fish of Argentina Central.

MIGUEL A. MANCINI; SILVIA E. GUAGLIARDO; RUBÉN D. TANZOLA; VÍCTOR SALINAS; GERARDO MORRA; FERNANDA G. BIOLÉ

BIOCELL

INST HISTOL EMBRIOL-CONICET

Lugar: Mendoza; Año: 2011 vol. 35 p. 236 - 236

0327-9545

The parasitic diseases caused by anisakids affect a large varietyof fish and in some species produce a decrease in the body condition.The aim of this work was to identify the nematodes speciesin fish from three shallow lakes in central Argentina, which differin their genesis, water quality and fish richness. Environmentsare located in San Luis province (L1: 33º59’W, 65°24’S, 20 ha, 4fish species) and Córdoba province (L2: 34º46’S, 63º38W, 190ha, 13 species and L3: 33º48’S, 64º51’W, 420 ha, 3 species). All helminths were Contracaecum sp. larvae (Nematoda: Anisakidae),consistent with type 2 third stage larvae described by Moravec etal. (1995, Folia Parasitologica 42). These nematodes were presentin the species Odontesthes bonariensis, Hoplias malabaricus,Rhamdia quelen and Oligosarcus jenynsii. According to our experience,R. quelen shows the greatest mean abundance (13.7±18.5nematodes/fish) and prevalence (87.5%). This study confirms thatonly Contracaecum sp. was present in the three environmentsevaluated. Because of the findings of these parasites is continuouslyincreasing and have been observed in other species, furtherstudies including fish and definitive hosts (birds), should be madefor a better understanding of the cycle.