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> Synbranchiformes (Spiny eels) > Mastacembelidae (Spiny eels)
Etymology: Macrognathus: Greek, makros = great + Greek, gnathos = jaw (Ref. 45335).
More on author: Günther.

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

; süßwasser benthopelagisch. Tropical

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Asia: Mekong, Chao Phraya (Ref. 43281), Maeklong, Peninsular and Southeast Thailand river systems (Ref. 26336).

Size / Gewicht / Alter

Maturity: L_m ? range ? - ? cm
Max length : 30.0 cm SL Männchen/unbestimmt; (Ref. 30857)

Kurzbeschreibung Bestimmungsschlüssel | Morphologie | Morphometrie

Rückenflossenstacheln (insgesamt) : 13 - 19; Rückenflossenweichstrahlen (insgesamt) : 53; Afterflossenweichstrahlen: 49; Wirbelzahl: 75. Distinguishable by its dorsal spine count of 13-19 and a series of 3-6 conspicuous ocelli along the base of the soft dorsal fin (Ref. 27732). The ocelli along the base of the dorsal fin are much larger than those in M. aral and the dorsal and caudal fins lack the fine striations seen in M. aral and M. meklongensis (Ref. 39392). Dorsal, caudal and anal fins not fused (Ref. 43281).

Found at bottom depths in slow-moving or standing waters. Often lies buried in the silt, sand, or fine gravel with only a portion of its head protruding from the bottom (Ref. 12693). Enters flooded forest (Ref. 9497). Emerges at dusk to forage for food. Feeds on benthic insect larvae, crustaceans, and worms (Ref. 12693). Marketed fresh and often seen in the aquarium trade (Ref. 12693).

Life cycle and mating behavior Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fecundity | Larven

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Kottelat, M., 1998. Fishes of the Nam Theun and Xe Bangfai basins, Laos, with diagnoses of twenty-two new species (Teleostei: Cyprinidae, Balitoridae, Cobitidae, Coiidae and Odontobutidae). Ichthyol. Explor. Freshwat. 9(1):1-128. (Ref. 27732)

IUCN Rote Liste Status (Ref. 130435: Version 2024-1)

nicht bedroht (LC) ; Date assessed: 24 February 2011

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

Harmless

Nutzung durch Menschen

Fischereien: kommerziell; Aquarium: Kommerziell

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=0.00295 (0.00138 - 0.00633), b=2.94 (2.76 - 3.12), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.3 ±0.40 se; based on food items.

Widerstandsfähigkeit (Ref. 120179): mittel, Verdopplung der Population dauert 1,4 - 4,4 Jahre. (Preliminary K or Fecundity.).

Fishing Vulnerability (Ref. 59153): Low to moderate vulnerability (27 of 100).

Preiskategorie (Ref. 80766): Unknown.

Macrognathus siamensis (Günther, 1861)