Abstract

IWASZKIW, Juan M; ZAPPIETRO, Erica G; FERRIZ, Ricardo A  and  CHIARAMONTE, Gustavo E. Aportes a la biología de Gymnotus omarorum (Teleostei) de la Laguna Blanca, Parque Nacional Río Pilcomayo, Formosa: estado de condición, desarrollo gonadal y temporada reproductiva. Rev. Mus. Argent. Cienc. Nat. [online]. 2016, vol.18, n.2, pp.201-210. ISSN 1853-0400.

The aim of this work is to make a contribution to the knowledge of the state of condition and reproductive cycle of the moraine (Gymnotus omarorum) of Laguna Blanca, Pilcomayo River National Park (PNRP) in the province of Formosa. Gymnotus omarorum Richer-de-Forges, Crampton & Albert, 2009 is captured by members of “The Spring” Qom Community at Laguna Blanca, Pilcomayo River National Park (PNRP) in the province of Formosa, to be marketed as living bait for practice of sport fishing in rivers of the Plata basin in northeastern Argentina. Catching fish was carried out with “frame nets” commonly used by artisanal fishermen Qom in vegetated coastal areas, between spring 2012 and autumn 2013. We analyzed 108 females of 130 to 335 mm standard length. We recorded the type of split or partial reproduction characteristic of gymnotids. An extensive breeding season was detected, from early spring to early autumn, characterized by the presence of mature and spawned fish throughout the reproductive period.

Keywords : Inland fisheries; Gonadal development; Spawning type; Breeding season; Gymnotiformes; Argentina.

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