Pisces, Siluriformes, Auchenipteridae, Trachelyopterus lucenai Bertoletti, Pezzi da Silva & Pereira, 1995: historical occurrence and distribution extension

Abstract

The present note describes a historical occurrence and distribution extension of the species Trachelyopterus lucenai in coastal basins, state of Rio Grande do Sul, Brazil.

Biological invasion at an early stage? First record of the banjo catfish Pseudobunocephalus iheringii (Siluriformes: Aspredinidae) in the Tramandaí river basin, Brazil and the potential invasion pathway to this system

“…We argue that the absence of previous records in the Tramandaí river basin and the current establishment of artificial channels connecting the Laguna dos Patos and Tramandaí basin corroborate the hypothesis that this area may be the invasion pathway not only for P. iheringii, but probably for other previously recorded invasive species (Schifino et al, 2004;Artioli and Maia, 2010;Artioli et al, 2013). This inter-basin connection has been facilitated by local landscape characteristics, such as low terrain and large wetland areas, which allowed the development of rice fields and their associated network of artificial water channels (Becker et al, 2007), increasing the connectivity between two aquatic ecoregions (the Laguna dos Patos and Tramandaí-Mampituba).…”

“…The presence of nonnative fish species has been reported in the Tramandaí river basin (Schifino et al, 2004;Artioli and Maia 2010;Artioli et al, 2013), but their introduction pathway in the Tramandaí river basin is unknown. A plausible possibility points to the artificial water channels in the wetlands and rice fields at the watershed divide between the Laguna dos Patos basin and the Tramandaí river basin.…”

<i>Contracaecum<i> spp. (NEMATODA: ANISAKIDAE) AND <i>Eustrongylides<i> spp. (NEMATODA: DIOCTOPHYMATIDAE) NEMATODE LARVAE WITH ZOONOTIC POTENCIAL FOUND IN TWO FISH SPECIES FROM TRAMANDAÍ RIVER BASIN, SOUTHERN BRAZIL

“…Just like A. pantaneiro, in Rio Grande do Sul state, it is native of the Uruguai river basin (Bertoletti et al, 1992). In the Tramandai river basin it is considered an alien species and was reported by Schifino et al (2004) and Artioli and Maia, (2016). Its feeding habit can be described as generalist/opportunistic and it feeds mainly on fish, insects and mollusks (Maia et al, 2013).…”

The record and threats of the invasion of palometa Serrasalmus maculatus (Characiformes: Serrasalmidae) in the Patos lagoon drainage, southern Brazil

“…Since the 1980s, the following fish species native to the Uruguay River basin have been registered as invasive in the Patos Lagoon drainage, where the Jacuí River basin is the main tributary: peixe‐cachorro ( Acestrorhynchus pantaneiro Menezes 1992; Saccol‐Pereira et al ., 2006), porrudo ( Trachelyopterus lucenai Bertoletti, da Silva & Pereira 1995; Bertoletti et al ., 1992), and corvina‐de‐água‐doce ( Pachyurus bonariensis Steindachner 1879; Dufech & Fialho, 2007). Two of them ( A. pantaneiro and T. lucenai ) dispersed further to the Tramandaí River basin and the coastal lagoons in the northeast of the state (Artioli et al ., 2013; Artioli & Maia, 2010; respectively), and recently these three species were recorded as invasive species in the main tributaries of the Mirim Lake in Uruguay (Loureiro et al ., 2020). In contrast, so far there are no records of fish species transposition in the opposite direction (from Patos Lagoon basin to Uruguay River basin), suggesting the absence of permanent connections between these basins.…”

“…In the lack of other serrasalmid species occurring in the Jacuí River basin, there is reasonable confidence in these reports of S. maculatus-mostly made by professional fishermen-to indicate a broader recent dispersal of S. maculatus along the Jacuí River basin, at least since 2015, according to the oldest records in our compilation (Moraes, 2015). Two of them (A. pantaneiro and T. lucenai) dispersed further to the Tramandaí River basin and the coastal lagoons in the northeast of the state (Artioli et al, 2013;Artioli & Maia, 2010; respectively), and recently these three species were recorded as invasive species in the main tributaries of the Mirim Lake in Uruguay (Loureiro et al, 2020).…”