Evidence of a landlocked reproducing population of the marine pejerrey Odontesthes argentinensis (Actinopterygii; Atherinopsidae).
Colautti, D. C., Miranda, L., Gonzalez-Castro, M., Villanova, V., Strussmann, C. A., Mancini, M., Maiztegui, T., Berasain, G., Hattori, R., Grosman, F., Sanzano, P., Lozano, I., Vegh, S. L., Salinas, V., Del Ponti, O., Del Fresno, P., Minotti, P., Yamamoto, Y. and Baigun, C. R. M.
Laboratorio de Ecologia de Peces Instituto de Limnologia 'Dr. Raul A. Ringuelet' (ILPLA-CONICET), La Plata, Argentina.
Laboratorio de Ictiofisiologia y Acuicultura IIB-INTECH (CONICET-UNSAM), Chascomus, Argentina.
Laboratorio de Biotaxonomia Morfologica y Molecular de Peces, Instituto de Investigaciones Marinas y Costeras (IIMyC-CONICET), Mar del Plata, Argentina.
Laboratorio de Biotecnologia Acuatica (FCByF-UNR) Centro Cientifico, Tecnologico y Educativo Acuario del Rio Parana, Rosario, Argentina.
Centro Cientifico y Tecnologico Conicet Rosario (CCT-Conicet Rosario), Rosario, Argentina.
Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, Tokyo, Japan.
Ecologia & Acuicultura, Facultad de Agronomia y Veterinaria (UNRC), Rio Cuarto, Argentina.
Direccion Provincial de Pesca, Ministerio de agroindustria de la Provincia de Buenos Aires, Lastra y Juarez (7130), Chascomus, Buenos Aires, Argentina.
Sao Paulo 31 Fisheries Institute (APTA/SAA), Campos do Jordao, 12460-000, Brazil.
Facultad de Ciencias Veterinarias, Instituto Ecosistemas (UNCPBA-CIC), Tandil, Argentina.
Laboratorio de Ecotoxicologia Acuatica, Instituto de Biodiversidad y Biologia Experimental Aplicada (IBBEA-CONICET), Ciudad Universitaria, Buenos Aires, Argentina.
Instituto de Investigaciones en Produccion Animal (INPA-CONICET), Buenos Aires, Argentina.
Departamento de Recursos Naturales, Facultad de Ciencias Exactas y Naturales (UNLPam), Santa Rosa, Argentina.
Laboratorio de Ecologia, Teledeteccion y Ecoinformatica3iA Instituto de Investigacion e Ingenieria Ambiental Universidad Nacional de San Martin Campus Miguelete, Martin, Argentina.
Laboratorio de Ecologia Pesquera Aplicada, Instituto de Investigacion e Ingenieria Ambiental (UNSAM-CONICET), Buenos Aires, Argentina.
In South America, the order Atheriniformes includes the monophyletic genus Odontesthes with 20 species that inhabit freshwater, estuarine and coastal environments. Pejerrey Odontesthes argentinensis is widely distributed in coastal and estuarine areas of the Atlantic Ocean and is known to foray into estuaries of river systems, particularly in conditions of elevated salinity. However, to our knowledge, a landlocked self-sustaining population has never been recorded. In this study, we examined the pejerrey population of Salada de Pedro Luro Lake (south-east of Buenos Aires Province, Argentina) to clarify its taxonomic identity. An integrative taxonomic analysis based on traditional meristic, landmark-based morphometrics and genetic techniques suggests that the Salada de Pedro Luro pejerrey population represents a novel case of physiological and morphological adaptation of a marine pejerrey species to a landlocked environment and emphasises the environmental plasticity of this group of fishes.
Journal of Fish Biology 96(1): 202-216 (2020)