Overview

Distribution

Range Description

This species occurs in the upper Tocantins River basin in Brazil.
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Upper Tocantins River basin, Brazil.
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South America: upper Tocantins River basin.
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Physical Description

Size

Max. size

5.3 cm SL (male/unsexed; (Ref. 35140))
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Type Information

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: Glycerin 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.
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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
  • Paratype: Vari, R. P. & Harold, A. 2001. Smithsonian Contributions to Zoology. No. 613: 83, 28, 31.
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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
  • Paratype: Vari, R. P. & Harold, A. 2001. Smithsonian Contributions to Zoology. No. 613: 83, 28, 31.
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
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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Environment

benthopelagic; 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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Population

Population
This species has a stable population trend at present.

Population Trend
Stable
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Threats

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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Least Concern (LC)
  • IUCN 2006 2006 IUCN red list of threatened species. www.iucnredlist.org. Downloaded July 2006.
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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).
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