Extension del límite austral de distribucion de tres especies de peces oseos tropicales en la costa de la Provincia de Buenos Aires, Argentina

Abstract

RESUMEN.Se presentan tres nuevos registros de especies de peces óseos cuya distribución corresponde a aguas tropicales, capturados por buques pesqueros en la costa de la Provincia de Buenos Aires, Argentina (CPBA,. Los ejemplares corresponden a las especies: Rachycentrum canadum, Elops saurus y Caulolatilus chrysops. Estos registros amplían significativamente el límite austral de su distribución. La presencia ocasional de estas especies está asociada al transporte de agua subtropical cálida proveniente de la plataforma continental brasilera. Esta hipótesis es probada mediante el análisis de imágenes satelitales de temperatura superficial del mar. Palabras clave: distribución, osteichthyes, teledetección satelital, Buenos Aires, Argentina. Southern extension of three species of tropical bony fishes along the coast ofBuenos Aires Province, Argentina ABSTRACT. We document the southern records of three species of tropical bony fishes along the coast of Buenos Aires Province, Argentina (CBAP, 36-38ºS). Rachycentrum canadum, Elops saurus and Caulolatilus chrysops were caught by bottom-trawl commercial vessels. Records presented here significantly extend southward their latitudinal distribution from those previously reported. Using sea surface temperature satellite images we show a southward warm circulation event from Brazil as a putative factor to explain the occurrence of these bony fishes in the CBAP.

Southernmost record of Elops smithi in the Southwest Atlantic. A tropical species in waters of Patagonia, Argentina

“…The present work extended the distribution of E. smithi southward by 8 degrees of latitude and ~1500 km in the Southwest Atlantic. The previous records of E. saurus (Milessi et al, 2012) and the new records of E. smithi in different areas and years, would indicate that these are not isolated events and are likely to represent an incipient colonization of the Elops genus to the southern Southwest Atlantic. Given the morphological similarities between E. saurus and E. smithi, the possibility of misidentifications of these species is not discarded, since in most works in which E. saurus was identified, key diagnostic characteristic were not revised.…”

“…Until recently, the ladyfish Elops saurus (Linnaeus, 1766), was the only living known elopid species (McBride et al, 2010;Obermiller & Pfeiler, 2003). However, Smith (1989) (Franco et al, 2014;Garcia-Junior et al, 2015;Marceniuk et al, 2017;Medeiros et al, 2018;Mendes et al, 2018;Pinheiro et al, 2015), and recently, Milessi et al (2012) documented the presence of E. saurus in Laguna de Rocha in Uruguay (34°33′S-54°22'W) and in the northern coast of Argentina (37°59'S-57°27′W). On the other hand, E. smithi has been recorded in marine, coastal and estuarine environments of Brazil and Uruguay (De Sousa et al, 2019;Lucena & Carvalho-Neto, 2012;Machado et al, 2012;Sánchez-Botero et al, 2016).…”

“…In the southwestern Atlantic, E . saurus has been identified as the most common elopid in most surveys of fish populations on the Brazilian coast (Franco et al, 2014; Garcia‐Junior et al, 2015; Marceniuk et al, 2017; Medeiros et al, 2018; Mendes et al, 2018; Pinheiro et al, 2015), and recently, Milessi et al (2012) documented the presence of E . saurus in Laguna de Rocha in Uruguay (34°33′S–54°22’W) and in the northern coast of Argentina (37°59’S–57°27′W).…”

Occurrence of the snowy grouper, Hyporthodus niveatus (Valenciennes, 1828), in Argentine waters

“…The presence of H. niveatus in Argentina is an addition to other tropical or warm‐temperate fish species where the distributional range is expanded to include higher latitudes (Galván et al., ; Irigoyen et al., ; Scenna et al., ; Venerus et al., ; Góngora et al., ; Delpiani et al., ; Milessi et al., ). However, we cannot overlook the possibility that the newly‐cited species had been previously unnoticed due to: (i) morphological similarities with local species and other newly described specimens; (ii) scarcity of earlier systematic studies of fish communities in the area and the fact that most distributional ranges for the Argentine marine fish fauna were described according to off‐shore trawling data (Venerus et al., ).…”

Aluterus monoceros (Acanthopterygii, Tetraodontiformes) southwards distribution range extension in Argentine waters

“…Said oceanographic process is known as warm coastal drift (Balech 1986; Balech and Ehrlich 2008) and is common in Argentine waters during austral Summer and Autumn, when winds coming from the north and north-east become stronger (Guerrero et al 1997;Martos and Piccolo, 1998). The STSW flow allows the arrival of subtropical and tropical fishes to Mar del Plata, Argentina (Cousseau and Figueroa 1989;Figueroa et al 1992Figueroa et al , 2000Izzo et al 2009;Milessi et al 2012Milessi et al , 2017.…”