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Akysis varius Ng & Kottelat, 1998

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Akysis varius
Picture by Baird, I.G.

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> Siluriformes (Catfishes) > Akysidae (Stream catfishes) > Akysinae
Etymology: Akysis: Derived from Greek, a = without + Greek, kysthos = bladder (Ref. 45335)varius: The specific name is derived from the Latin varius (variable), in allusion to the highly variable number of serrae on the posterior edge of the pectoral spine.
More on authors: Ng & Kottelat.

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

; zoet water benthopelagisch. Tropical

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Asia: Mekong basin.

Grootte / Gewicht / Leeftijd

Maturity: Lm ?  range ? - ? cm
Max length : 4.0 cm SL mannelijk / geslacht onbekend; (Ref. 30857)

Korte beschrijving Determinatiesleutels | Morfologie | Morfometrie

Dorsale zachte stralen (totaal) : 5 - 6; Anale zachte stralen: 8 - 10; Wervels: 31 - 33. Distinguished from all its congeners by the following unique combination of characters: truncate caudal fin; length of caudal peduncle 16.1-19.8% SL; depth of caudal peduncle 6.5-9.3% SL; length of adipose-fin base 25.6-29.5% SL; interorbital distance 42-46% HL; eye diameter 13-20% HL; length of nasal barbel 44-66% HL; straight lateral margins of the head when viewed dorsally; and 0-5 serrae on the posterior edge of the pectoral spine (Ref. 30226).

Biologie     Verklarende woordenlijst (bv. epibenthic)

Hides in decomposing vegetation in stream beds, where it apparently feeds on zooplankton and rotifers (Ref. 30226).

Levenscyclus en paargedrag Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven

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Ng, H.H. and M. Kottelat, 1998. The catfish genus Akysis Bleeker (Teleostei: Akysidae) in Indochina, with descriptions of six new species. J. Nat. Hist. 32:1057-1097. (Ref. 30226)

Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2024-1)

  Onvoldoende gegevens (DD) ; Date assessed: 16 December 2010

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

  Harmless





Gebruik door de mens

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Estimates based on models

Fylogenetische diversiteitsindex (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).
Trofisch niveau (Ref. 69278):  3.5   ±0.6 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100).