Overview

Distribution

Range Description

The species is known to inhabit tropical and subtropical regions of the world between 22⁰N- 27⁰S. It has so far not been reported from eastern Himalaya, though its congener (Anguilla bengalensis) has been reported from Nepal.

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Western Indian Ocean, Africa and India: South African and East African watersheds and islands in Western Indian Ocean (Seychelles, Madagascar and Mascarenes) east to India and Sri Lanka.
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology

Most of life is subsequently spent in lakes, streams and rivers but as the maturity approaches the adults migrate seaward to spawn. The eels spawn in deep tropical/subtropical oceans. The larvae are transported and dispersed by ocean currents which metamorphose into glass eels. These glass eels/elvers in estuaries migrate to freshwater and these juveniles/yellow fin eels (non migratory) grows to silver form (migratory). The silver form migrates to sea for spawning before they die.


Systems
  • Freshwater
  • Marine
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Depth range based on 23 specimens in 2 taxa.
Water temperature and chemistry ranges based on 21 samples.

Environmental ranges
  Depth range (m): 0.4575 - 8
  Temperature range (°C): 28.885 - 28.954
  Nitrate (umol/L): 0.075 - 0.099
  Salinity (PPS): 32.200 - 34.131
  Oxygen (ml/l): 4.427 - 4.525
  Phosphate (umol/l): 0.113 - 0.339
  Silicate (umol/l): 1.579 - 4.465

Graphical representation

Depth range (m): 0.4575 - 8

Temperature range (°C): 28.885 - 28.954

Nitrate (umol/L): 0.075 - 0.099

Salinity (PPS): 32.200 - 34.131

Oxygen (ml/l): 4.427 - 4.525

Phosphate (umol/l): 0.113 - 0.339

Silicate (umol/l): 1.579 - 4.465
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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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
2010

Assessor/s
Chaudhry, S.

Reviewer/s
Rema Devi, K.R., Daniel, B.A., Arunachalam, M., Dahanukar, N. & Molur, S.

Contributor/s
Molur, S.

Justification
Since Anguilla bicolor is widespread and the quality of threat affecting its population remains unknown, it is assessed as Least Concern.
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Population

Population
In studies conducted at southern Sri Lanka the species was stated to be fairly uniform as reflected in the catch per unit effort.

Population Trend
Unknown
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Threats

Major Threats
The adult individuals migrating back to sea for spawning are the most difficult phase of its life as they are vulnerable to fishing. The migratory routes cease to exist due to multiple impoundments in small streams and rivers.
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Management

Conservation Actions

Conservation Actions

Several species are cultured artificially in Asia and Europe. This species is also raised commercially in Philippines for economic purposes.

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Wikipedia

Anguilla bicolor

Anguilla bicolor is a species of eel in the genus Anguilla of the family Anguillidae consisting of two subspecies.

Subspecies[edit]

References[edit]

  1. ^ Jacoby, D., Harrison, I.J. & Gollock, M. (2014). "Anguilla bicolor". IUCN Red List of Threatened Species. Version 2014.1. International Union for Conservation of Nature. Retrieved 30 June 2014. 
  2. ^ Froese, Rainer, and Daniel Pauly, eds. (2006). Anguilla bicolor bicolor in FishBase. 05 2006 version.
  3. ^ Froese, Rainer, and Daniel Pauly, eds. (2006). Anguilla bicolor pacifica in FishBase. 05 2006 version.
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