Overview

Distribution

Range Description

This species occurs in the Tubarão River basin and coastal drainages between its mouth and the Da Madre River, in southeastern Brazil.
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South America: Tubarão River basin and coastal drainages between its mouth and Da Madre River.
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Tubarão River basin and coastal drainages between its mouth and Da Madre River, Brazil.
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Physical Description

Size

Maximum size: 75.4 mm SL
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Max. size

8.8 cm SL (male/unsexed; (Ref. 38376))
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
D. singularis is a benthopelagic (ecological region at the lowest level of water body) species. Small rivers, clear water fast flowing rock bottom. Feeds on insects and other small invertebrates and graze on plant matter, grazing on it on rocks.

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; while the distribution is very small, the threats to the basin are unlikely to impact the species to a significant extent.
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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
D. singularis may be threatened with habitat degradation in some parts of its range, as wetlands in Santa Catarina are impacted from activities connected with coal production (Diegues 1994). For many years coal mining was the largest productive activity in southern Santa Catarina. In the past, coal mining was executed with little environmental care and was the principal cause of water pollution in the region. The improper management of residues generated by the exploration and processing of coal, in some cases still practiced today, has resulted in acid mine drainage which has contaminated water and soil with sulphuric acid and toxic metals. The consequences of this pollution are still found in the regional environment (SIECESC 2004). Although a restricted species, D. singularis is unlikely to be under threat by these processes throughout its entire range, or with great severity.
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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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