Aaptosyax grypus Rainboth, 1991

Giant salmon carp
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Aaptosyax grypus
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Classificatie / Names Populaire namen | Synoniemen | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (Straalvinnigen) > Cypriniformes (Carps) > Cyprinidae (Minnows or carps) > No subfamily
Etymology: Aaptosyax: Greek, aaptos =giant, terrible + Greek, ykis, yaina, yanis, syaina, syax and syakon = a kind of sole; but it is also related to yaina =hyena and wild pig ;  grypus: Named for its strongly curved jaws (Ref. 34719).

Environment: milieu / climate zone / depth range / distribution range Ecologie

; zoetwater pelagisch; potamodroom (Ref. 51243).   Tropical (Ref. 71989)

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Asia: Mekong River.

Size / Gewicht / Leeftijd

Maturity: Lm ?  range ? - ? cm
Max length : 130 cm SL mannelijk/geslacht niet bekend; (Ref. 9497); Maximaal gepubliceerd gewicht: 30.0 kg (Ref. 9497)

Korte beschrijving Morfologie | Morfometrie

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).

Biologie     Verklarende woordenlijst (b.v. epibenthic)

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).

Life cycle and mating behavior Geslachtsrijpheid | Voortplanting | Kuitschieten | Eieren | Fecundity | Larven

Voornaamste referentie Upload your references | Referenties | Coördinator | Medewerkers

Roberts, T.R. and T.J. Warren, 1994. Observations of fishes and fisheries in southern Laos and northeastern Cambodia, October 1993-Febuary 1994. Nat. Hist. Bull. Siam. Soc. 42:87-115. (Ref. 10431)

Status op de Rode Lijst van het IUCN (Ref. 119314)

  Ernstig bedreigd (CR) (A2acd); Date assessed: 17 January 2011

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaarlijk voor mensen

  Harmless





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Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 1.0000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00955 (0.00451 - 0.02020), b=3.02 (2.84 - 3.20), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  4.5   ±0.80 se; Based on food items.
Weerstandsvermogen (Ref. 69278):  zeer laag, minimale populatieverdubbelingstijd meer dan 14 jaar (Preliminary K or Fecundity.).
Kwetsbaarheid (Ref. 59153):  Very high vulnerability (80 of 100) .