Peixes Não-Nativos Em Riachos No Brasil: Estado Da Arte, Lacunas De Conhecimento E Perspectivas

Abstract

Biological invasions are among the main causes of biodiversity loss on planet. Losses are accentuated in streams, which are sensitive to human impacts, since they have specialized fauna and higher degree of endemism. Despite this, studies on invasions by non-native fish in streams are incipient in Brazil. In this review, we present an introduction on the process (i.e., stages) of biological invasion, the environmental factors that influence the establishment and the impacts of non-native species in streams. A methodological step-by-step is also presented as a way to guide the conduct of studies on non-native species in Brazilian streams. In addition, management actions measures are presented to prevent new cases of introductions and suggestions for studies on invasions in streams. Avoiding propagule pressure and environmental education, as well as legal aspects of Brazilian legislation, are management actions that can prevent new introductions. Finally, gaps in knowledge and perspectives are raised as an incentive for interested parties to enter the subject and develop new studies on non-native fishes in Brazilian streams.

Influence of different types of margins in the fish assemblage from an urban river

“…The introduction of non-native species is currently one of the biggest problems responsible for the decline and/or even extinction of native species (Garcia et al, 2021). After going through some steps in the invasion process, introduced species can become invasive; if that happens, they are able to change the structure of communities, the functionality of ecosystems and interfere in ecological relationships, such as predation, competition, parasitism, and mutualism (Gallardo et al 2016).…”

Relatório temático sobre espécies exóticas invasoras, biodiversidade e serviços ecossistêmicos

“…É importante ressaltar que o número de espécies exóticas invasoras é dinâmico, estando em contínuo processo de atualização, tanto porque espécies introduzidas há mais tempo podem expressar seu potencial invasor nas áreas onde foram introduzidas ou em novas áreas (ver etapas do processo de invasão -item 1.3), quanto também porque o número de espécies introduzidas segue aumentando para muitos grupos biológicos. Por exemplo, para peixes de águas continentais, o número de introduções segue crescente em diversas bacias hidrográficas brasileiras, podendo chegar a mais de uma centena de espécies (Garcia et al 2018(Garcia et al , 2021. Outro fator que deve ser considerado é a dificuldade de diagnóstico tanto da introdução quanto do estabelecimento de espécies exóticas para alguns grupos biológicos, como os microrganismos, e para alguns tipos de ecossistemas, como os marinhos.…”

Ecological and biological patterns of stream fish studies from the Piracicaba-Capivari-Jundiaí Basin (PCJ Basin, SP) assessed through a systematic review

“…This stage was characterized by the compilation of information obtained from the extracted articles, related to (1) species and its degree of threat (according to ICMBio 2018) (2) location (geographical coordinates) and stream order; (3) species status (native or non-native); (4) sub-basin, micro-basin and river/stream where the survey was carried out; (5) main themes (trophic ecology, growth, environmental impacts, community structure, integrated biological aspects, reproduction, riparian zone influences on the fish community/populations) and ( 6) temporal trends, defined as the difference between the last and the first sampling year. We considered non-native species to be those introduced outside their natural range (Garcia et al 2021) and classified them according to Langeani et al (2007).…”