Mariano Soricetti‡, Santiago Morawicki‡, Fredy José Guardiola Rivas‡, Catalina Guidi‡, Facundo Quezada‡, Adriana Edith Almirón§, Patricio José Solimano‡Corresponding author: Mariano Soricetti ( msoricetti@unrn.edu.ar ) Academic editor: Bárbara Borges Calegari © Mariano Soricetti, Santiago Morawicki, Fredy José Guardiola Rivas, Catalina Guidi, Facundo Quezada, Adriana Edith Almirón, Patricio José Solimano. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Citation:
Soricetti M, Morawicki S, Guardiola Rivas FJ, Guidi C, Quezada F, Almirón AE, Solimano PJ (2020) Ichthyofauna of the lower course of the Negro river drainage, Patagonia Argentina. Check List 16(4): 895-905. https://doi.org/10.15560/16.4.895 |  |
The drainage of the Negro River is the most important watercourse in the Patagonia ecoregion and, together with the Colorado river basin, define an ecotone, i.e., a zoogeographic transition, where coexist the Brazilian and Patagonian lineages of freshwater fishes. The Patagonia ecoregion has 29 fish species, 15 native and the remaining introduced. For this study, the ichthyofauna of seven locations in the lower course of the Negro river drainage were sampled along two years. Gillnets, coastal trawls, cast nets, river trammel nets and fishing rods were used to catch specimens. A total of 13 species belonging to nine orders and 11 families were collected. The families Atherinopsidae and Characidae show the highest species richness and one exotic species, Cyprinus carpio Linnaeus, 1758, was recorded. The origin and distribution of some species is discussed, considering the role of human action and certain environmental factors.