Overview

Distribution

Range Description

This species is known from the upper Magdalena River, Colombia.
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Upper Magdalena River basin, Colombia.
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South America: upper Magdalena River, Colombia.
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Physical Description

Size

Max. size

8.6 cm SL (male/unsexed; (Ref. 49955))
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Diagnostic Description

Elongated round body in its anterior end; a pterotic that forms a spiny downward projecting process lacking supraneurals (Ref. 49955).
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
B. huilae is a benthopelagic (ecological region at the lowest level of water body) species that generally inhabits high altitude freshwaters.

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
The species is assessed as least concern due to wide distribution and lack of major threats across its range. While the river basin is highly impacted in the lower reaches, the species occurs at higher altitudes, and therefore is not impacted heavily by these threats.
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Population

Population
No population information known.

Population Trend
Unknown
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Threats

Major Threats
It is likely that B. huilae is threatened by habitat degradation. The Magdalena River basin has a high human population, of about 32 million, which results in major threats such as reservoir construction, interrupting longitudinal connectivity and leading to river floodplain degradation, and large scale agro-industrial projects in the catchment that leads to accelerated aquatic habitat degradation because of increased soil erosion and pesticide input. In addition, large amounts of untreated sewage is emptied into the basins waterways (Junk 2005). Though B. huilae is not known to be harvested, it is interesting to note that catches in the Magdalena River have declined by 78% over the past two decades, (Harvey 1998). It is not clear whether this is due to over-fishing, habitat degradation or both, but it is likely to have implications for other species in the Magdalena River basin.

However, as this species inhabits the upper reaches, and the threats are most severe in the lower basin near the river mouth, these are unlikely to constitute serious threats.
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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
There are no conservation measures in place.
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