Overview
Distribution
South America: upper Paraná River basin.
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Lima, F.C.T., L.R. Malabarba, P.A. Buckup, J.F. Pezzi da Silva, R.P. Vari, A. Harold, R. Benine, O.T. Oyakawa, C.S. Pavanelli, N.A. Menezes, C.A.S. Lucena, M.C.S.L. Malabarba, Z.M.S. Lucena, R.E. Reis, F. Langeani, C. Moreira et al. ⦠2003 Genera Incertae Sedis in Characidae. p. 106-168. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil. (Ref. 38376)
http://www.fishbase.org/references/FBRefSummary.php?id=38376&speccode=10622
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Range Description
This species occurs in the upper Paraná River basin, Brazil. The species is only known form its type locality of the Mogi-Guaçu River basin. More specimens have been collected from the type locality, though not from elsewhere. It is probable that the species occurs more broadly, but collection attempts have not been made.
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Ecology
Habitat
Habitat and Ecology
Habitat and Ecology
Systems
A. trierythropterus is a benthopelagic (ecological region at the lowest level of water body) species. Occurs in ponds and small lakes near the flood plain areas.
Systems
- Freshwater
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Molecular Biology and Genetics
Molecular Biology
Statistics of barcoding coverage: Astyanax trierythropterus
Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 3
Species With Barcodes: 1
Public Records: 0
Specimens with Barcodes: 3
Species With Barcodes: 1
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Conservation
Conservation Status
IUCN Red List Assessment
Red List Category
VU
Vulnerable
Red List Criteria
A2c;B1ab(i,iii,iv)
Version
3.1
Year Assessed
2009
Assessor/s
Reis, R & Lima, F.
Reviewer/s
Collen, B., Darwall, W., Ram, M. & Smith, K. (SRLI Freshwater Fish Evaluation Workshop)
Contributor/s
Justification
Assessed as Vulnerable due to an inferred population decline of greater than 30% over the past ten years. This is due to an increase in water pollution in the upper Paraná River basin but also because of continuing decline in habitat area and quality. It is suspected that populations of A. trierythropterus may have also become fragmented due to the construction of many dams within their range. With an estimated Extent of Occurrence of less than 12,000 km², this species also qualifies under B1ab(i,iii,iv) due to the threats listed above on its preferred habitats.
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Trends
Population
Population
Population Trend
The global population is decreasing, although detailed information is not yet available.
Population Trend
Decreasing
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Threats
Vulnerable (VU) (A2c; B1ab(i,iii,iv))
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IUCN 2006 2006 IUCN red list of threatened species. www.iucnredlist.org. Downloaded July 2006.
http://www.fishbase.org/references/FBRefSummary.php?id=57073
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Major Threats
Damming of the upper Paraná River in Jupia has seriously affected the aquatic environment. There are over 130 dams in the region, which affect virtually all the principle tributaries. The dam interrupts the migration of many species that travel upstream to reproduce (Agostinho and Gomes 2001). However, it is not known how this would have specifically affected A. trierythropterus.
The major threat in the upper and middle Paraná basin is degradation in the quality of the basin's water resources, due to the disposal of untreated domestic and industrial effluents. The Paraná basin has the highest urban-industrial density in the inner country. The presence of herbicides and fungicides used in farming and cattle-rearing development may also become a considerable source of pollution. The construction of Itaipu, Rosana and Taquaracu hydroelectric power plants has attracted more people to the region to work (Diegues 1994).
The major threat in the upper and middle Paraná basin is degradation in the quality of the basin's water resources, due to the disposal of untreated domestic and industrial effluents. The Paraná basin has the highest urban-industrial density in the inner country. The presence of herbicides and fungicides used in farming and cattle-rearing development may also become a considerable source of pollution. The construction of Itaipu, Rosana and Taquaracu hydroelectric power plants has attracted more people to the region to work (Diegues 1994).
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Management
Conservation Actions
Conservation Actions
There are no conservation measures in place although they are needed. Surveys into the habitat status and population numbers are needed, plus information on the affects of the known threats (dam construction and increase in water pollution) are necessary on the hope that A. trierythropterus can be down listed in the future.
© International Union for Conservation of Nature and Natural Resources
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IUCN
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