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J Fish Biol. 2020 Jan;96(1):202-216. doi: 10.1111/jfb.14207. Epub 2019 Dec 1.

Evidence of a landlocked reproducing population of the marine pejerrey Odontesthes argentinensis (Actinopterygii; Atherinopsidae).

Author information

1
Laboratorio de Ecología de Peces Instituto de Limnología 'Dr. Raúl A. Ringuelet' (ILPLA-CONICET), La Plata, Argentina.
2
Laboratorio de Ictiofisiología y Acuicultura IIB-INTECH (CONICET-UNSAM), Chascomús, Argentina.
3
Laboratorio de Biotaxonomía Morfológica y Molecular de Peces, Instituto de Investigaciones Marinas y Costeras (IIMyC-CONICET), Mar del Plata, Argentina.
4
Laboratorio de Biotecnología Acuática (FCByF-UNR) Centro Científico, Tecnológico y Educativo Acuario del Río Paraná, Rosario, Argentina.
5
Centro Científico y Tecnológico Conicet Rosario (CCT-Conicet Rosario), Rosario, Argentina.
6
Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, Tokyo, Japan.
7
Ecología & Acuicultura, Facultad de Agronomía y Veterinaria (UNRC), Río Cuarto, Argentina.
8
Dirección Provincial de Pesca, Ministerio de agroindustria de la Provincia de Buenos Aires, Lastra y Juarez (7130), Chascomús, Buenos Aires, Argentina.
9
São Paulo 31 Fisheries Institute (APTA/SAA), Campos do Jordão, 12460-000, Brazil.
10
Facultad de Ciencias Veterinarias, Instituto Ecosistemas (UNCPBA-CIC), Tandil, Argentina.
11
Laboratorio de Ecotoxicología Acuática, Instituto de Biodiversidad y Biología Experimental Aplicada (IBBEA-CONICET), Ciudad Universitaria, Buenos Aires, Argentina.
12
Instituto de Investigaciones en Producción Animal (INPA-CONICET), Buenos Aires, Argentina.
13
Departamento de Recursos Naturales, Facultad de Ciencias Exactas y Naturales (UNLPam), Santa Rosa, Argentina.
14
Laboratorio de Ecología, Teledetección y Ecoinformática3iA Instituto de Investigación e Ingeniería Ambiental Universidad Nacional de San Martín Campus Miguelete, Martín, Argentina.
15
Laboratorio de Ecología Pesquera Aplicada, Instituto de Investigación e Ingeniería Ambiental (UNSAM-CONICET), Buenos Aires, Argentina.

Abstract

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.

KEYWORDS:

Atherinopsidae; biogeography; environmental plasticity; integrative taxonomy; landlocked population

PMID:
31729023
DOI:
10.1111/jfb.14207

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