Escapes of non-native fish from flooded aquaculture facilities: the case of Paranapanema River, southern Brazil

Casimiro, Armando César Rodrigues; Garcia, Diego Azevedo Zoccal; Vidotto‐Magnoni, Ana Paula; Britton, J. Robert; Agostinho, Ângelo Antônio; Almeida, Fernanda Simões de; Órsi, Mário Luís

doi:10.3897/zoologia.35.e14638

Cited by 45 publications

(29 citation statements)

References 31 publications

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“…The impacts of these projects have caused large disturbances in pristine environments, facilitating biological invasions (Lima-Junior et al 2018;Bezerra et al 2019b). Aquaculture without adequate controls (e.g., without effective barriers to prevent dispersion of organisms) has the potential to spread alien species (Orsi and Agostinho 1999;Latini et al 2016;Casimiro et al 2018). Invasive species released from aquaculture projects generate significant ecological consequences, such as changes in the structure of the native fish populations, loss of genetic variability (i.e.…”

Section: Resultsmentioning

confidence: 99%

Public risk perceptions associated with Asian carp introduction and corresponding response actions

Kahler¹,

Liu²,

Newcomb³

et al. 2020

MBI

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In the last ten years Araipama gigas, commonly known as pirarucu, expanded its distribution upstream into the Madeira River rapids where it is not a native species. The invasion was favored by escapes from Peruvian fish farms upstream in the Madeira River Basin, where they have been raising pirarucu since the 1970s. Although the Madeira River rapids had formerly represented a geographical barrier to this invasion by limiting floodplain habitats, the construction of the Santo Antônio and Jirau dams in 2011 flooded the two most important falls, replacing the rapids stretch with a lentic or semi-lentic habitat favoring the invasion of A. gigas. Since construction of the dams, fisheries reports have been marked by the decrease of traditional commercial species, coupled with the presence of invasive populations of A. gigas. This example highlights a major emergent threat to artisanal fishing in the Amazonian freshwater system: government policies favoring dam construction and the consequent spread of native fish species used in aquaculture to new regions upstream of waterfalls where they are not native.

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Section: Resultsmentioning

confidence: 99%

Public risk perceptions associated with Asian carp introduction and corresponding response actions

Kahler¹,

Liu²,

Newcomb³

et al. 2020

MBI

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“…In the summer of 2015/16, about 1.14 million fish belonging to 21 species and three hybrids escaped from fish farms to the Paranapanema River basin. Of this total, 96% comprised O. niloticus and C. rendalli specimens (Casimiro et al, 2018). It is important to note that O. niloticus specimens had already been recorded in the Capivara Reservoir (Paranapanema River) (Orsi & Britton, 2014).…”

Section: Geographical Distribution In Brazil Referencesmentioning

confidence: 99%

“…The species is farmed both in earthen ponds and in net cages located in reservoirs. Even if the species is only reared in earthen ponds, these constructions are usually built close to riverine areas subject to flooding, and fish escapes may occur during rainy periods (Casimiro et al, 2018).…”

Section: Geographical Distribution In Brazil Referencesmentioning

confidence: 99%

From Africa to Brazil: detection of African Oreochromis niloticus parasites in Brazilian fish farms

2019

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Aim To evaluate the introduction of Oreochromis niloticus gill parasites in the Paranapanema River basin, northern Paraná, southern Brazil, as well as to inventory its occurrences in Brazilian fish farms and discuss the risks of transmission to native fauna. Methods The gills of 632 fish specimens from four fish farms in the Paranapanema Basin were analyzed. The parasites were collected, processed and identified according to specific procedure. Literature review was carried out to compile records of occurrence of gill parasites species in other Brazilian river basins. Results A total of seven (7) species of parasites were recorded, five (5) of the genus Cichlidogyrus, one (1) of Scutogyrus (Ancyrocephalidae, Monogenoidea) and one (1) of Lamproglena, Lamproglena monodi (Copepoda, Lernaeidae). All native from Africa. Some of these species have been reported in fish farms located in five other Brazilian watersheds. However, in this study a greater number of African gill parasite species was recorded in fish farms in northern Paraná (seven species), in the Paranapanema Basin, with Cichlidogyrus rognoni reported only for this basin. Conclusions The results confirm the introduction of these African parasites along with their host, O. niloticus, and the establishment of these species in Brazilian waters, since many specimens belonging to the species identified herein presented breeding activity for at least one period of the year. Although, only L. monodi has been recorded parasitizing Brazilian native species, data reported for other countries demonstrates the imminent risk of transmission of these O. niloticus parasites to native cichlids.

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“…This was suggested as a key factor for the introduction of alien fish species due to aquaculture activities in southern Brazil [41]. Consequently, we emphasize two management approaches suggested by previous studies: (1) an adequate biosecurity management for aquaculture farm facilities such as increasing pond embankment height or constructing containment structures to prevent escape events during flooding [41], and (2) a reduction in freshwater aquaculture [42]. Given the co-occurrences of increased aquaculture [43] and increasing flooding risks in Asia [44,45] in recent years, there two management suggestions should also be considered for other Asian countries with extensive freshwater aquaculture.…”

Section: Plos Onementioning

confidence: 99%

Determinants of establishment success: Comparing alien and native freshwater fishes in Taiwan

2020

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Many parts of Asia, including Taiwan, have suffered severely from freshwater fish invasions. However, few studies using an assemblage approach have been conducted in the region so far that would help to prioritize suitable preventive actions. In this study, we focused on the invasion process from the import stage to the establishment stage, and defined establishment success as the success during this predefined process. We used datasets of freshwater fish assemblages in Taiwan to (1) compare established versus non-established alien species to distinguish the determinants of establishment success, and (2) to use these determinants to test a life history hypothesis which predicts that the magnitudes of the determinants should be significantly different between established alien species and native species. We collated a dataset for freshwater fish species which were imported into Taiwan (n = 118) of which some successfully established (n = 26), and another dataset for freshwater fish species native to Taiwan (n = 77). For each imported species, we collected data for 17 variables, including two phylogenetic, two human-use, two invasion history, and 11 life history variables. We then used decision tree methods, which have advantages in analyzing datasets with many variables of mixed types without the need to make assumptions about data distributions and input data for missing values. Our results showed that aquaculture use and maximum body length were the most important determinants for predicting establishment success of alien freshwater fish in Taiwan. Comparing five important determinants between established alien versus native species showed that the established alien species were significantly more often used in aquaculture, were associated with a higher number of established countries, and had a larger body length and greater highest water temperature tolerance than the native species. We thus conclude that our results provided evidence to support our stated hypothesis. We suggest that aquaculture use, measures of body size, and the number of previously invaded countries may alert researchers and conservation managers to species with a high establishment potential, especially for countries with similar conditions as those in Taiwan.

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Escapes of non-native fish from flooded aquaculture facilities: the case of Paranapanema River, southern Brazil

Cited by 45 publications

References 31 publications

Public risk perceptions associated with Asian carp introduction and corresponding response actions

Public risk perceptions associated with Asian carp introduction and corresponding response actions

From Africa to Brazil: detection of African Oreochromis niloticus parasites in Brazilian fish farms

Determinants of establishment success: Comparing alien and native freshwater fishes in Taiwan

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