First report of the black gemfish Nesiarchus nasutus (Perciformes: Gempylidae) in Argentinean waters

Abstract

The gempylid Nesiarchus nasutus is reported for the first time from Argentinean waters, the southernmost occurrence of the species in the Southwestern Atlantic. This suggests that the fluctuating environmental characteristics of the area would be proper for the presence of tropical and subtropical species.Keywords: southwestern Atlantic, Brazilian current, trichiuroids fish, deep-sea. Primeiro relatório do gemfish preto Nesiarchus nasutus (Perciformes: Gempylidae) em águas argentinas ResumoA ocorrência de Nesiarchus nasutus é registrado pela primeira vez em águas argentinas, sendo a esta ocorrência mais meridional da espécie no Atlântico Sudoeste. Isto sugere que as características ambientais flutuantes da área seriam adequadas para a presença de espécies tropicais e subtropicais na mesma. Palavras-chave:Atlântico ocidental sul, corrente do Brasil, trichiuroidea, águas profundas.

Southernmost record of Coryphaena hippurus Linnaeus, 1758 (Coryphaenidae) in the southwest Atlantic Ocean, off Mar del Plata, Argentina

“…Over the past two decades, numerous teleost species of tropical and subtropical origin, as well as other marine organisms, have been documented in temperate waters, providing further support for the WCD hypothesis (e.g. Scenna et al 2006, Segura et al 2009, Izzo et al 2010, Solari et al 2010, Bogan & Di Martino 2011, Milessi et al 2012, Delpiani et al 2013, Bruno et al 2014, Trobbiani et al 2014, Spath et al 2015, Leoni et al 2016, De Wysiecki et al 2018). This trend is likely attributable to regional tropicalization, where tropical and subtropical environmental conditions are increasingly observed in areas previously characterized by temperate conditions (Cheung et al 2012, Milessi et al 2015.…”