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Teleostei (teleosts) > Siluriformes (Catfishes) > Bagridae (Bagrid catfishes)
Etymology: Mystus: Greek, mystax = whiskered, used by Belon in 1553 to describe all fishes with whiskers (Ref. 45335); alasensis: Name derived from the Sungai Alas (Alas River) drainage.

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

Freshwater; demersal. Tropical

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Asia: Sungai Alas drainage in Sumatra, Indonesia.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 10.8 cm SL male/unsexed; (Ref. 55439)

Short description Identification keys | Morphology | Morphometrics

Dorsal spines (total): 1; Dorsal soft rays (total): 7; Anal soft rays: 12 - 14; Vertebrae: 38 - 41. Distinguished from all other Southeast Asian congeners, except Mystus castaneus, M. impluviatus and M. nigriceps by the following combination of characters: a moderately long (29-37% SL), low adipose-fin, uniform body color, fossa on midline of the cranium not reaching to the base of the supraoccipital process and extremely long maxillary barbels that reach beyond the base of the caudal fin (Ref. 55439). Differs from M. castaneus, M. impluviatus and M. nigriceps in lacking a dark triangular mark at the base of the caudal fin. Further differs from M. nigriceps in having a longer (34.3-36.3% SL vs. 26.3-31.4), deeper (6.7-7.5% SL vs. 4.1-6.0) adipose fin and longer pelvic fins (17.6-20.2% SL vs. 13.4-16.7); and from M. castaenus and M. impluviatus in having a more gently-sloping dorsal profile of the head. Differs also from M. impluviatus in lacking (vs. presence) of fontanel on the supraoccipital and having a deeper adipose fin (6.7-7.5% SL vs. 4.7-6.0) (Ref. 55439).

Facultative air-breathing in the genus (Ref. 126274); Oviparous, distinct pairing possibly like other members of the same family (Ref. 205).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Ng, H.H. and R.K. Hadiaty, 2005. Two new bagrid catfish (Teleostei: Bagridae) from the Alas River drainage, northern Sumatra. Ichthyol. Explor. Freshwat. 16(1):83-92. (Ref. 55439)

IUCN Red List Status (Ref. 130435: Version 2024-1)

Data deficient (DD) ; Date assessed: 01 September 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO - Publication: search | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00832 (0.00359 - 0.01926), b=2.95 (2.78 - 3.12), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.3 ±0.4 se; based on size and trophs of closest relatives

Resilience (Ref. 120179): Medium, minimum population doubling time 1.4 - 4.4 years (Assuming Fec < 10,000).

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

Nutrients (Ref. 124155): Calcium = 346 [186, 855] mg/100g; Iron = 3.23 [1.59, 5.89] mg/100g; Protein = 16 [15, 17] %; Omega3 = 0.356 [0.131, 0.935] g/100g; Selenium = 57.6 [20.7, 156.5] μg/100g; VitaminA = 78.2 [24.8, 240.5] μg/100g; Zinc = 2.6 [1.5, 4.3] mg/100g (wet weight);

Mystus alasensis Ng & Hadiaty, 2005