Country Species Summary

Aaptosyax grypus in Thailand
Giant salmon carp

Aaptosyax grypus Rainboth, 1991
Family:	Cyprinidae (Minnows or carps)	picture (Aagry_u0.gif) by FAO
Order:	Cypriniformes (carps)
Class:	Actinopterygii (ray-finned fishes)
FishBase name:	Giant salmon carp
Max. size:	130 cm SL (male/unsexed; Ref. 9497); max. published weight: 30.0 kg (Ref. 9497)
Environment:	pelagic; potamodromous
Climate:	tropical
Global Importance:	fisheries:
Resilience:	Very low, minimum population doubling time more than 14 years (Preliminary K or Fecundity.)
Distribution:	Asia: Mekong River.
Diagnosis:	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).
Biology:	Inhabits mainstreams of middle reaches in deep rocky rapids. Juveniles occur in tributaries (Ref. 58784). 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)
Threatened:	Data deficient, see IUCN Red List , (Ref. 36508)
Dangerous:	harmless
Coordinator:
Main Ref:	Roberts, T.R. and T.J. Warren. 1994. (Ref. 10431)
Update \| Add

Thailand country information
Common names:	Giant salmon carp	Ref: Vidthayanon, C., 2005
Status:	native	Ref: Vidthayanon, C., J. Karnasuta and J. Nabhitabhata, 1997
Salinity:	freshwater, brackish
Uses:	no uses
Comments:	Known from the Mekong River (Ref. 26336). Occurs in Loei but reported that is not found there anymore indicating that the present day distribution may be significantly reduced (Ref. 37770). Found at Khong Chiam Dist., Ubon Ratchathani Prov (Ref. 33021); also from Mukda Han and Nakhon Phanom (Ref. 37773). Threatened due to habitat loss and overfishing (Ref. 58784). Museum: Mekong river, Thailand at Ubotrachatance, BMNH 1989.6.30.2a., BMNH 1989.6.30.1-2 (Ref. 31982). Also Ref. 10431, 37770, 43281. Status of threat: Critically Endangered (Ref. 58784).
Country Information:	www.cia.gov/cia/publications/factbook/geos/th.html
Occurrences:	Occurrences Point map
Main Ref:	Monkolprasit, S., S. Sontirat, S. Vimollohakarn and T. Songsirikul, 1997
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Checked: Torres, Armi G.

Modified: Torres, Armi G.

Entered: Garilao, Cristina V.

CGNET - US

Page created by: Eli, 20.10.03, last modified by Eli, 26.06.07

	Ref.:		Glossary
		(e.g. 9948)		(e.g. cephalopods)
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