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

MIRANDA LEANDO; STRÜSSMANN, CARLOS; BERASAIN, GUSTAVO; SANZANO, PABLO; SALINAS, VICTOR; MINOTTI, PRISCILA; COLAUTTI, DARÍO ; VILLANOVA, VANINA; MAIZTEGUI, TOMAS; GROSMAN, FABIAN; VEGH, L SABINA; FRESNO, PAMELA; BAIGÚN, CLAUDIO; GONZALEZ CASTRO, MARIANO; MANCINI, MIGUEL; HATTORI, RICARDO; LOZANO, ISMAEL; DEL PONTI, OMAR; YAMAMOTO, YOJI; MIRANDA LEANDO; STRÜSSMANN, CARLOS; BERASAIN, GUSTAVO; SANZANO, PABLO; SALINAS, VICTOR; MINOTTI, PRISCILA; COLAUTTI, DARÍO ; VILLANOVA, VANINA; MAIZTEGUI, TOMAS; GROSMAN, FABIAN; VEGH, L SABINA; FRESNO, PAMELA; BAIGÚN, CLAUDIO; GONZALEZ CASTRO, MARIANO; MANCINI, MIGUEL; HATTORI, RICARDO; LOZANO, ISMAEL; DEL PONTI, OMAR; YAMAMOTO, YOJI

JOURNAL OF FISH BIOLOGY

WILEY-BLACKWELL PUBLISHING, INC

Lugar: Londres; Año: 2019 p. 202 - 216

0022-1112

In South America, the order Atheriniformes includes the monophyletic genusOdontesthes with 20 species that inhabit freshwater, estuarine and coastal environments. Pejerrey Odontesthes argentinensis is widely distributed in coastal and estuarineareas 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 landlockedself-sustaining population has never been recorded. In this study, we examined thepejerrey population of Salada de Pedro Luro Lake (south-east of Buenos Aires Province, Argentina) to clarify its taxonomic identity. An integrative taxonomic analysisbased on traditional meristic, landmark-based morphometrics and genetic techniquessuggests that the Salada de Pedro Luro pejerrey population represents a novel case ofphysiological and morphological adaptation of a marine pejerrey species to a landlockedenvironment and emphasises the environmental plasticity of this group of fishes