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Spread of Amazonian Freshwater Fishes Beyond Their Native Ranges.

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Bibliographische Detailangaben
Titel: Spread of Amazonian Freshwater Fishes Beyond Their Native Ranges.
Autoren: Orlandi Neto, Aymar1,2 (AUTHOR) orlandi.aymar@gmail.com, Ribas, Luiz Guilherme dos Santos3 (AUTHOR), Franceschini, Lidiane2 (AUTHOR), Dias, João Henrique Pinheiro1 (AUTHOR), Marques, Hugo4 (AUTHOR), Ramos, Igor Paiva1 (AUTHOR), Casatti, Lilian2 (AUTHOR), Gubiani, Éder André3 (AUTHOR), Vitule, Jean Ricardo Simões5 (AUTHOR)
Quelle: Fish & Fisheries. Oct2025, p1. 12p. 5 Illustrations.
Schlagwörter: *INTRODUCED species, *FRESHWATER fishes, *BIODIVERSITY, *ENVIRONMENTAL management, *SPECIES distribution, *ECOLOGICAL impact, *FISHING
Geografische Kategorien: SOUTH America, PARANA River (Brazil-Argentina), PARANA (Brazil : State), AMAZON River Watershed, PARANA Basin (Brazil)
Abstract: ABSTRACT The spread and establishment of Amazonian species outside their native ranges through activities such as sport fishing, aquaculture, and the ornamental fish industry may lead to ecological changes in recipient ecosystems. We investigated the global distribution of Amazonian freshwater fish (AFF) and conducted a case study in the upper Paraná River Basin to assess potential impacts on fish fauna. We compiled a comprehensive dataset from multiple sources: global occurrence records from the Global Biodiversity Information Facility between 1980 and June 2024, and long‐term fish fauna monitoring data collected from 1992 to 2015 across four reservoirs in the upper Paraná Basin. Global occurrences were aggregated into country‐level distribution polygons to estimate species richness per nation, while records from the United States were analysed within freshwater ecoregion boundaries to highlight regions of high invasion risk. In the upper Paraná case, AFF presence was determined using a presence‐absence matrix, and temporal trends in richness and proportion were analysed using linear and non‐linear models. Our results, based on 76,796 records of 281 AFF species, reveal a marked increase in AFF occurrences outside the Amazon Basin, particularly in South America and the United States. In the upper Paraná River Basin, AFF richness increased until approximately 2005, while the proportion continued to rise throughout the study period. These findings support “Amazonization” as an emerging pattern with implications for native biodiversity and ecosystem functioning. This study underscores the need for targeted management strategies to mitigate the impacts of AFF introductions in freshwater environments worldwide. [ABSTRACT FROM AUTHOR]
Datenbank: Academic Search Index
Beschreibung
Abstract:ABSTRACT The spread and establishment of Amazonian species outside their native ranges through activities such as sport fishing, aquaculture, and the ornamental fish industry may lead to ecological changes in recipient ecosystems. We investigated the global distribution of Amazonian freshwater fish (AFF) and conducted a case study in the upper Paraná River Basin to assess potential impacts on fish fauna. We compiled a comprehensive dataset from multiple sources: global occurrence records from the Global Biodiversity Information Facility between 1980 and June 2024, and long‐term fish fauna monitoring data collected from 1992 to 2015 across four reservoirs in the upper Paraná Basin. Global occurrences were aggregated into country‐level distribution polygons to estimate species richness per nation, while records from the United States were analysed within freshwater ecoregion boundaries to highlight regions of high invasion risk. In the upper Paraná case, AFF presence was determined using a presence‐absence matrix, and temporal trends in richness and proportion were analysed using linear and non‐linear models. Our results, based on 76,796 records of 281 AFF species, reveal a marked increase in AFF occurrences outside the Amazon Basin, particularly in South America and the United States. In the upper Paraná River Basin, AFF richness increased until approximately 2005, while the proportion continued to rise throughout the study period. These findings support “Amazonization” as an emerging pattern with implications for native biodiversity and ecosystem functioning. This study underscores the need for targeted management strategies to mitigate the impacts of AFF introductions in freshwater environments worldwide. [ABSTRACT FROM AUTHOR]
ISSN:14672960
DOI:10.1111/faf.70032