Occurrence of the non-native fish Salminus brasiliensis (Cuvier, 1816), in a global biodiversity ecoregion, Iguaçu River, Paraná River basin, Brazil

Abstract

This technical paper presents results from pilot field trials conducted on the novel use of a biodegradable jute material to eradicate the highly invasive aquatic macrophyte Lagarosiphon major Ridley from Lough Corrib, Ireland. The results demonstrate the ability of the jute material to comprehensively kill L. major and to restore native macrophyte communities to areas of the lake that were previously overgrown with this priority invasive species. To date, eight indigenous plant species (four charophytes and four angiosperms) have been recorded growing through the loose-weave jute fabric. However, no Lagarosiphon has been recorded as doing so. This material has the potential for broader application in the management of nuisance aquatic weeds and in the restoration of native flora extirpated by these alien species.

Foraging behavior interactions between the invasive Nile Tilapia (Cichliformes: Cichlidae) and three large native predators

“…Broader studies have already indicated that larger carnivores consume a wide array of small species and juveniles (Juanes et al, 2002;Bozza, Hahn, 2010;Santos et al, 2012), while B. orbignyanus has low potential as a consumer of Nile Tilapia (Santos et al, 2009). Furthermore, P. corruscans shows ambushing behavior in shallow areas with different densities of macrophytes (Sabino, Zuanon, 1998;Giaquinto, Hoffmann, 2010;Petry et al, 2010) and S. brasiliensis has high potential for predation and also good maneuvering and swimming abilities (Agostinho et al, 2007;Gubiani et al, 2010;Santos et al, 2013).…”

“…It is important to notice, however, that the tanks could have limited the space for swimming and, in a larger setting, Salminus brasiliensis and Brycon orbignyanus might be more defensive, as here they may be unable to swim to the middle layer and the surface, which would be their typical behavior in their natural habitats. Nevertheless, S. brasiliensis is an aggressive predator that can easily adapt to changes in environmental conditions (Gubiani et al, 2010). Most of the preys are also at the surface.…”

Relatório Temático Água: Biodiversidade, Serviços Ecossistêmicos e Bem-Estar Humano no Brasil

“…Esse isolamento das espécies fez com que cerca de 70% das espécies de peixes nativos do rio Iguaçu não possa ser encontrada em nenhuma outra área do planeta (Baumgartner et al, 2012). Recentemente, a espécie Salminus brasiliensis, popularmente conhecida como "dourado", foi introduzida no rio Iguaçu (Gubiani et al, 2010;Ribeiro et al, 2017). O dourado é um predador visual eficiente, se alimenta de uma grande variedade de presas e é extremamente apreciado na pesca (Vitule et al, 2014), potencial motivo pelo qual a espécie foi introduzida nesse rio.…”

Occurrence of the alien invasive loachMisgurnus anguillicaudatusin the Iguaçu River basin in southern Brazil: a note of concern

“…In terms of conservation, the drainage is of special concern because it contains a high proportion of endemic fish species (Abell et al., ), many of which are endangered (Rosa and Lima, ). The unique fish fauna of the drainage is threatened due to a variety of factors, including habitat degradation by human activities, water pollution, impoundments, fisheries, and the introduction of alien fishes (Myers, ; Gubiani et al., ).…”