Overview

Comprehensive Description

Nangra nangra (Hamilton 1822) ZBK

Pimelodus nangra Hamilton 1822 ZBK : 193, 378, pl. 11 (fig. 63). Type locality: Ganges River at Patna , India . Neotype : CAS 96626 . Neotype designated by Roberts & Ferraris (1998).

Nangra buchanani Day 1877a ZBK : 494, pl. 113 (fig. 3). Type locality: Ganges, Jumna, and Indus rivers; Delhi , India . Syntypes and/or Day specimens : AMS B.7541 (1, syntype ) Indus River , NMW 45328 (1), RMNH 2770 (1), ZMB 18041 (1) Delhi . Apparently a replacement name for Pimelodus nangra Hamilton 1822 ZBK ; if so, the type locality is Ganges River at Patna, India. Roberts& Ferraris (1998) did not regard as a strict replacement name and consider specimens from several localities as syntypes.

Distribution: Indus, Ganges and Bramhputra drainages, Pakistan, India, Bangladesh and Nepal (Roberts & Ferraris, 1998).

  • Alfred W. Thomson, Lawrence M. Page (2006): Genera of the Asian Catfish Families Sisoridae and Erethistidae (Teleostei: Siluriformes). Zootaxa 1345, 1-96: 36-36, URL:http://www.zoobank.org/urn:lsid:zoobank.org:pub:25EFA792-7DA4-4E0D-A69A-12591B8422DE
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Nangra nangra ZBK :

Ganges drainage : FMNH 93598 (10; 27.8-30.8).

  • Alfred W. Thomson, Lawrence M. Page (2006): Genera of the Asian Catfish Families Sisoridae and Erethistidae (Teleostei: Siluriformes). Zootaxa 1345, 1-96: 95-95, URL:http://www.zoobank.org/urn:lsid:zoobank.org:pub:25EFA792-7DA4-4E0D-A69A-12591B8422DE
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Biology

Inhabits upper reaches of rivers (Ref. 41236).
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Distribution

Range Description

N. nangra occurs in Pakistan, India (in the Ganges and the Yamuna rivers), Bangladesh and Nepal.
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Asia: Pakistan, India, Bangladesh and Nepal.
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Ganges and Indus River drainagees, south-central Asia: Pakistan, India, Nepal and Bangladesh.
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Physical Description

Morphology

Dorsal spines (total): 1; Dorsal soft rays (total): 79; Vertebrae: 35 - 37
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Size

Maximum size: 55 mm TL
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Max. size

5.5 cm TL (male/unsexed; (Ref. 1479))
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Diagnostic Description

Dorsal fin typically with 8 branched rays. Anal fin with 3-4 simple rays, 9-11 branched rays. Snout moderately projecting; anterior naris origin close to snout tip (distance between anterior naris and snout tip less than eye diameter). Nasal barbel reaching at least to end of head, sometimes reaching dorsal-fin origin; maxillary barbel reaching past to adipose-fin origin; maxillary barbel membrane small, with narrow attachment to cheek only; maxillary bone long, reaching posteriorly to end of head. Vent and genital papillae near middle of pelvic fins (Ref. 40780).
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Ecology

Habitat

Indus River Demersal Habitat

This taxon is one of the native demersal fish taxa that are found in the Indus River system. Major tributaries of the Indus rise in the Himalayan Mountains and the Hindu Kush; these influent rivers include the Chenab, Jhelum, Ravi and Sutlej. The Indus mainstem rises on the Tibetan Plateau and flows generally westward.

Generally the Indus sustains slower velocities with a wider channel as the river approaches its delta on the Arabian Sea. The Indus transports massive amounts of silt generated by human disturbances in its watershed as well as the torrential monsoonal rain events. Water quality issues in the Indus Basin have historically been dominated by sediment loading in a watershed which is subject to high natural erosivity, and early disturbance by sedentary agriculture on the floodplains and valleys. Beginning in the twentieth century, water pollution has been aggravated by massive water withdrawals for agriculture that have then concentrated pollutants.

The Green Revolution has exacerbated water pollution by considerable additions of nitrate to promote crop growth. Other aggravating factors have included increasing amounts of herbicides and pesticides, as pressures to increase crop production expand. Flow of the perennial Indus is dominated by: (a) meltwaters from the Tibetan icefield, the third largest ice sheet formation in the world; (b) snowfall and snowmelt from higher elevation of the watershed; and (c) episodic monsoonal rains that lead to periodic flooding in the basin.

Some of the arge native demersal fish associates in the Indus Basin are the 70 centimetre (cm) scaly osman (Diptychus maculatus), the 30 cm reba (Bangana ariza), the 30 cm Indus snowtrout (Ptychobarbus conirostris), the 30 cm Kunar snowtrout (Schizothorax labiatus), the 35 cm false osman (Schizopygopsis stoliczkai), the 47 cm Chirruh snowtrout (Schizothorax esocinus), and the 40 cm Sattar snowtrout (Schizopyge curvifrons).

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Habitat and Ecology

Habitat and Ecology
N. nangra is a demersal species, which inhabits the upper reaches of rivers.

Systems
  • Freshwater
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Environment

demersal; freshwater
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Nangra nangra

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


There is 1 barcode sequence available from BOLD and GenBank.

Below is the 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.

Other sequences that do not yet meet barcode criteria may also be available.

GTATTTGGTGCCTGAGCCGGAATAGTAGGCACGGCTCTT---AGTCTACTGATCCGGGCTGAGTTAGCCCAGCCCGGAGCCTTGCTAGGCGAT---GATCAAATTTATAATGTCATCGTCACTGCCCATGCCTTTGTTATAATCTTCTTTATAGTAATGCCAATTATAATTGGTGGCTTCGGCAACTGACTCGTACCCCTGATG---ATTGGGGCTCCAGACATGGCTTTCCCTCGTATAAATAATATGAGCTTCTGACTATTGCCCCCCTCTTTCTTACTACTTCTTGCCTCCTCTGGTGTTGAAGCGGGGGCAGGTACAGGTTGAACTGTCTACCCCCCGCTAGCTGGTAATCTGGCACATGCCGGAGCCTCCGTAGATTTA---ACTATCTTCTCCCTACACCTTGCAGGTGTTTCCTCCATCCTAGGAGCTATTAACTTCATTACAACCATTATTAATATAAAACCCCCAGCAATTTCGCAATATCAAACACCCTTATTTGTGTGAGCCGTCCTAATTACAGCAGTACTACTACTACTCTCATTACCAGTGCTAGCTGCC---GGAATCACAATACTCCTTACAGACCGAAACCTAAACACAACCTTCTTTGACCCTGCAGGGGGAGGAGATCCAATTCTTTATCAA
-- end --

Download FASTA File

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Statistics of barcoding coverage: Nangra nangra

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 1
Specimens with Barcodes: 1
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
Devi, R. & Boguskaya, N.

Reviewer/s
Collen, B., Darwall, W., Ram, M. & Smith, K. (SRLI Freshwater Fish Evaluation Workshop)

Contributor/s

Justification
N. nangra has been assessed as Least Concern due to its wide distribution and lack of any known major widespread threats to the species.
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Population

Population
N. nangra is reported to be a rare species in Nepal.

Molur and Walker (1998) reported a 30% decline in N. nagra in ten years, however the data behind this is not known, and no information for the most recent ten year period are available.

Population Trend
Stable
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Threats

Major Threats
Pollution and loss of habitat from anthropogenic factors are likely threats to this species.
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Least Concern (LC)
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Management

Conservation Actions

Conservation Actions
There are no conservation measures currently in place.
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: of no interest
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