Overview
Distribution
South America: upper Tocantins 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 Tocantins River basin in Brazil.
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Physical Description
Size
Max. size
5.3 cm SL (male/unsexed; (Ref. 35140))
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Vari, R.P. and A.S. Harold 2001 Phylogenetic study of the Neotropical fish genera Creagrutus Günther and Piabina Reinhardt (Teleostei: Ostariophysi: Characiformes), with a revision of the Cis-Andean species. Smith. Cont. Zool. 613:1-239. (Ref. 35140)
http://www.fishbase.org/references/FBRefSummary.php?id=35140&speccode=12351
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Type Information
Paratype for Creagrutus britskii Vari & Harold
Catalog Number: USNM 292214
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Preparation: Radiograph
Collector(s): W. Starnes, M. Ribeiro, J. Viana & et al.
Year Collected: 1984
Locality: Brazil; Goias, Riberao Cangalha At Rd., 13 Air km NNE Formosa (Tocantins Dr.)., Goias, Brazil, South America
Depth (m): 0.1 to 1
Catalog Number: USNM 292214
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Preparation: Radiograph
Collector(s): W. Starnes, M. Ribeiro, J. Viana & et al.
Year Collected: 1984
Locality: Brazil; Goias, Riberao Cangalha At Rd., 13 Air km NNE Formosa (Tocantins Dr.)., Goias, Brazil, South America
Depth (m): 0.1 to 1
- Paratype: Vari, R. P. & Harold, A. 2001. Smithsonian Contributions to Zoology. No. 613: 83, 28, 31.
© Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
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Paratype for Creagrutus britskii Vari & Harold
Catalog Number: USNM 292226
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Preparation: Radiograph
Collector(s): W. Starnes, M. Ribeiro, J. Viana & et al.
Year Collected: 1984
Locality: Brazil; Goias, Riberao Paranoa Do Meio, At Road Crossing 11 Air km NNE Formosa (Tocantins Dr.)., Goias, Brazil, South America
Depth (m): 0.1 to 2
Catalog Number: USNM 292226
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Preparation: Radiograph
Collector(s): W. Starnes, M. Ribeiro, J. Viana & et al.
Year Collected: 1984
Locality: Brazil; Goias, Riberao Paranoa Do Meio, At Road Crossing 11 Air km NNE Formosa (Tocantins Dr.)., Goias, Brazil, South America
Depth (m): 0.1 to 2
- Paratype: Vari, R. P. & Harold, A. 2001. Smithsonian Contributions to Zoology. No. 613: 83, 28, 31.
© Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
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Paratype for Creagrutus britskii Vari & Harold
Catalog Number: USNM 340952
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Preparation: Glycerine With Cartilage Stain
Collector(s): J. Oliveira & W. Costa
Year Collected: 1988
Locality: Brazil, Goias, Iaciara, Ribierao Macambira, Near Bridge On Highway 60112, Goias, Brazil, South America
Catalog Number: USNM 340952
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Preparation: Glycerine With Cartilage Stain
Collector(s): J. Oliveira & W. Costa
Year Collected: 1988
Locality: Brazil, Goias, Iaciara, Ribierao Macambira, Near Bridge On Highway 60112, Goias, Brazil, South America
- Paratype: Vari, R. P. & Harold, A. 2001. Smithsonian Contributions to Zoology. No. 613: 83, 28, 31.
© Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
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Ecology
Habitat
Habitat and Ecology
Habitat and Ecology
Systems
C. britskii is a benthopelagic (ecological region at the lowest level of water body) species. Occurs in moderate sized tributaries, generally bottom swimmers feeding on benthic aquatic insects. Swim in small schools in fast flowing water.
Systems
- Freshwater
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Conservation
Conservation Status
IUCN Red List Assessment
Red List Category
LC
Least Concern
Red List Criteria
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 Least Concern due to its fairly wide distribution. Damming that has occurred in the area of this species' distribution has not had a major impact on it.
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Trends
Population
Population
Population Trend
This species has a stable population trend at present.
Population Trend
Stable
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Threats
Least Concern (LC)
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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 is in fact a factor of major concern in regard to the conservation of the ichthyofauna of the upper Rio Tocantins area. Within the range of C. britskii the huge Serra da Mesa dam was built, which undoubtedly destroyed much habitat formerly occupied by the species. However, since C. britskii is a small-sized species which occurs in moderate-sized streams, only the building of large dams would not probably result in its demise.
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Management
Conservation Actions
Conservation Actions
The species occurs in at least one conservation unit (Terra Ronca State Park in northern Goiás).
© International Union for Conservation of Nature and Natural Resources
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