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Mystus gulio

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CHORDATA ACTINOPTERYGII SILURIFORMES BAGRIDAE

Scientific Name: Mystus gulio
Species Authority: (Hamilton, 1822)
Taxonomic Notes: Mystus gulio was described from the higher parts of the Gangetic estuary by Hamilton (1822). Although it is often regarded as a species widely distributed throughout South and Southeast Asia, there is some evidence to indicate that the populations from Southeast Asia constitute one or more species that are distinct from populations in the Indian subcontinent (H.H. Ng pers. comm.). A taxonomic reappraisal of this species based on material from throughout its entire distribution is badly needed.

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2010
Date Assessed: 2009-10-05
Assessor(s): Ng, H.H.
Reviewer(s): Pal, M., Vishwanath, W. & Molur, S.
Contributor(s): Molur, S.
Justification:
Despite being targeted in artisanal fisheries, being sometimes harvested as an ornamental fish and demonstrated population declines in parts of its range, the level of exploitation is not deemed high enough to be a threat to long-term survival of this species, which is still considered relatively abundant. This species is therefore assessed as Least Concern here. However, it should be noted that there are taxonomic problems surrounding the identity of this species and it is likely that what is currently classified as Mystus gulio may consist of several species with more geographically circumscribed distributions. Should this be the case, it may be necessary to reassess this species in the near future.

Geographic Range [top]

Range Description: This species is found in coastal regions and the lower reaches of rivers throughout the Indian subcontinent eastwards to the Indochinese peninsula and southwards to Sundaic Southeast Asia.
Countries:
Native:
Bangladesh; Brunei Darussalam; India (Andhra Pradesh, Daman, Diu, Goa, Gujarat, Karnataka, Kerala, Maharashtra, Orissa, Pondicherry, Tamil Nadu, West Bengal); Indonesia; Malaysia; Myanmar; Pakistan; Singapore; Sri Lanka; Thailand; Viet Nam
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Although Patra et al. (2005) report a mean decline of 33.6% in catch for this species in the Sundarbans (Ganges-Brahmaputra estuary) for the period 1960-2000 and Mishra et al. (2009) report a decline of 27.8% in catch for this species in southwestern Bengal for a similar period, there is insufficient data from other areas where this species is naturally distributed. Current indications are that this is a widespread, common species.
Population Trend: Decreasing

Habitat and Ecology [top]

Habitat and Ecology: This species inhabits estuaries and tidal rivers and lakes, ascending to freshwater, often entering the sea (Talwar and Jhingran 1991).
Systems: Freshwater; Marine

Use and Trade [top]

Use and Trade: This species is commonly utilized as a food fish, and has occasionally been caught and exported as an ornamental fish.

Threats [top]

Major Threat(s): Although the southern West Bengal population is threatened from overfishing, threats to this species in the rest of its range are unknown. Since there is no information on the biology of this species, the impact of potential threats (especially those of an anthropogenic nature) remains unknown. The current threats to aquatic biodiversity in all of its known distribution have also not been adequately identified.

Conservation Actions [top]

Conservation Actions: There is insufficient information on the biology and potential threats for this species. Catch data for this species is also needed. The identities of the Southeast Asian populations require study to resolve their identities.

Citation: Ng, H.H. 2010. Mystus gulio. The IUCN Red List of Threatened Species. Version 2014.3. <www.iucnredlist.org>. Downloaded on 24 November 2014.
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