Aaptosyax
grypus
Rainboth, 1991
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Family:
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Cyprinidae
(Minnows or carps)
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Order:
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Cypriniformes
(carps)
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Class:
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Actinopterygii (ray-finned fishes)
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In this site name:
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Max. size:
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130 cm SL (male/unsexed; Ref. 9497); max. published weight: 30.0 kg (Ref. 9497) |
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Environment: |
pelagic; potamodromous (Ref. 51243); freshwater
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Climate: |
tropical |
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Importance:
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Resilience: |
Very low, minimum population doubling time more than 14 years (Preliminary K or Fecundity.) |
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Distribution:
ccfishery.net
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Asia: middle Mekong River of Laos and Thailand.
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Morphology:
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Well-developed adipose eye-lid, covering most of eye except pupil in large adults, less extensive in juveniles; presence of a large symphyseal knob in lower jaw fitting in a median notch in upper jaw (Ref. 43281).
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Biology: |
A large fast-swimming predator, feeding on fish of the middle and the upper water levels. Although most common along the Thai-Lao border at the mouth of the Mun River, its numbers have drastically decreased in recent years. This is perhaps due to dam construction or excessive gill netting, to which active pursuit predators, like this species, are particularly vulnerable (Ref. 12693). Undertakes upstream migration at the same time as Probarbus sp. in December-February (Ref. 37770) which may be related to spawning activity (Ref. 9497). Attains over 30 kg (Ref. 9497).
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Red List Status: |
Data deficient (DD) (Ref. 57073)
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Dangerous:
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harmless
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Coordinator: |
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