Overview

Distribution

Range Description

This species is found in the lower Paraná and Uruguay River basins, in Argentina, Uruguay and Brazil.
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Lower Paraná and Uruguay River basins: Argentina, Brazil and Uruguay.
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South America: lower Paraná and Uruguay River basins.
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Physical Description

Size

Max. size

4.8 cm SL (male/unsexed; (Ref. 34092))
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
D. terofali is a benthopelagic (ecological region at the lowest level of water body) species. It occurs in medium and small sized rivers and swims in small schools.

Systems
  • Freshwater
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Environment

benthopelagic; freshwater
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Diapoma terofali

The following is a representative barcode sequence, the centroid of all available sequences for this species.


There are 2 barcode sequences available from BOLD and GenBank.

Below is a sequence of the barcode region Cytochrome oxidase subunit 1 (COI or COX1) from a member of the species.

See the BOLD taxonomy browser for more complete information about this specimen and other sequences.

ACCCTTTACYTAGTATTCGGTGCCTGAGCTGGGATAGTTGGCACAGCTCTT---AGCCTCCTCATCCGAGCAGAATTAAGTCAACCTGGCTCCCTGCTAGGWGAT---GATCAAATTTACAATGTTATCGTAACTGCACATGCATTTGTAATAATTTTCTTTATAGTAATACCAGTAATAATTGGGGGCTTCGGAAACTGACTTATTCCCCTAATG---ATTGGTGCCCCAGATATAGCCTTCCCCCGAATAAATAACATAAGCTTTTGACTTCTACCGCCATCCTTCCTTCTTCTATTAKCCTCATCCGGAGTTGAAGCTGGAGCAGGCACAGGTTGAACTGTTTACCCTCCACTTGCTGGAAATCTAGCACATGCGGGAGCTTCTGTAGACCTA---ACAATTTTCTCACTCCATTTAGCTGGGGTATCTTCTATTTTGGGAGCAATTAATTTTATTACTACTATTATTAATATGAAACCCCCAGCCATCTCACAATATCAAACACCTTTATTTGTCTGAGCTGTTTTAATTACTGCCGTCCTTCTTCTCTTATCACTCCCCGTACTGGCAGCA---GGAATTACAATGCTACTAACAGACCGAAATCTTAATACCTCCTTCTTCGACCCGGCCGGAGGGGGAGACCCGATCCTTTATCAACATCTC
-- end --

Download FASTA File

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Statistics of barcoding coverage: Diapoma terofali

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 5
Specimens with Barcodes: 6
Species With Barcodes: 1
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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
This wide ranging species has been assessed as Least Concern because it is locally abundant. Although this species was under major threats in the past, it is unlikely that decline is still taking place.
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Population

Population
Locally abundant species.

Population Trend
Stable
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Threats

Major Threats
It is very likely that D. terofali is threatened by habitat degradation and water pollution. The Uruguay River basin has undergone intense deforestation since the onset of colonization. There is almost no original vegetation left, (there has been a 92.4% loss of original forest cover) and this has greatly affected the ecological balance, causing a desertification process to occur in the area (Diegues 1994). In addition, with there being at least 13 dams, there is a high degree of river fragmentation within the basin (Water Resources eAtlas 2005), and as a result, populations of most migratory fish species are severely diminished in the middle and upper Uruguay river (FAO 1996). However, it is unknown how this habitat alteration would have affected D. terofali.

The Paraná basin is also threatened by degradation in the quality of the basin's water resources, due to the disposal of untreated domestic and industrial effluents (Diegues, 1994), however, this is largely in the upper part of the basin, whereas the lower Paraná basin has a relatively low human population and is still in a rather pristine condition over large parts (Junk 2005).

However, the extent to which the above threats are acting on this species now is likely to have weakened significantly over the last decade and are probably not causing major decline now.
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Least Concern (LC)
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Management

Conservation Actions

Conservation Actions
There are no conservation measures in place and research into general biology and ecology (habitat status and population trends) are required.
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