Osphronemus exodon, Elephant ear gourami : fisheries

Osphronemus exodon Roberts, 1994

Elephant ear gourami
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Osphronemus exodon
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Classification / Names Noms communs | Synonymes | Catalog of Fishes(Genre, Espèce) | ITIS | CoL | WoRMS | Cloffa

> Anabantiformes (Gouramies, snakeheads) > Osphronemidae (Gouramies) > Osphroneminae
Etymology: Osphronemus: Greek, osphra = smell + Greek, nema = filament; because of the olfactory organs (Ref. 45335).  More on author: Roberts.

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

; eau douce pélagique; potamodrome (Ref. 51243).   Tropical

Distribution Pays | Zones FAO | Écosystèmes | Occurrences | Point map | Introductions | Faunafri

Asia: known only from the Mekong basin.

Taille / Poids / Âge

Maturity: Lm ?  range ? - ? cm
Max length : 60.0 cm SL mâle / non sexé; (Ref. 30857)

Description synthétique Morphologie | Morphométrie

Épines dorsales (Total): 14 - 16; Rayons mous dorsaux (Total): 10-11; Épines anales 11-13; Rayons mous anaux: 17 - 19. Differs from the other three known species of Osphronemus in having oral teeth increasingly enlarged and externalized in large adults, a condition apparently unique within anabantoid fishes. In large specimens examined, over 40 cm SL, all of the jaw teeth are enlarged, especially those in the outermost rows, which lie on the external surface of the jaws entirely outside the mouth when it is shut. Coloration of juveniles and adults also is diagnostic. Small juveniles have 6 or 7 vertical bars and a supra-anal dark oval spot, none of which are retained by adults and subadults. Juveniles over about 10 cm have a reddish orangish stripe on the lower part of the head and breast, a feature not observed in any other species. All adults have extensive dark (almost black) areas ventrally and pale areas dorsally. Several large specimens (especially from Stung Treng market, Cambodia) with large and irregular red blotches that superficially at least look very muck like bodied bruises.

Biologie     Glossaire (ex. epibenthic)

Occurs in pools of large rivers and in flooded forests during the rainy season. Feeds mainly on plant matter including fruits, leaves, and flowers, with some insects and crustaceans. Known to reproduce in non-flowing waters near the river shore during lowest water levels (Ref. 12693). Undertakes lateral migrations from the Mekong mainstream into floodplain areas during the flood season and returns to the Mekong River or other permanent water bodies during the dry season (Ref. 37770). These movements are triggered when water levels change (Ref. 37770). Marketed fresh (Ref. 12693).

Life cycle and mating behavior Maturité | Reproduction | Frai | Œufs | Fécondité | Larves

Builds a small nest, made of leaves and roots of a plant named "gohk kai" in Takam, just below the Lee Pee Waterfalls in southern Laos. Eggs and young are guarded by one parent as observed in the Mekong basin at Stung Treng.

Référence principale Upload your references | Références | Coordinateur | Collaborateurs

Rainboth, W.J., 1996. Fishes of the Cambodian Mekong. FAO species identification field guide for fishery purposes. FAO, Rome, 265 p. (Ref. 12693)

Statut dans la liste rouge de l'IUCN (Ref. 123251)

  Vulnérable, voir Liste Rouge IUCN (VU) (A2ce); Date assessed: 01 March 2007

CITES (Ref. 123416)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Menace pour l'homme

  Harmless





Utilisations par l'homme

Pêcheries: commercial
FAO - Publication: search | FishSource |

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Sources Internet

Aquatic Commons | BHL | Cloffa | Websites from users | FishWatcher | CISTI | Catalog of Fishes: Genre, Espèce | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: génôme, nucléotide | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | Aquariums publics | PubMed | Reef Life Survey | Socotra Atlas | Arbre de Vie | Wikipedia: aller à, chercher | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5625   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01698 (0.00692 - 0.04169), b=3.01 (2.79 - 3.23), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Niveau trophique (Ref. 69278):  2.7   ±0.29 se; based on food items.
Résilience (Ref. 120179):  Milieu, temps minimum de doublement de population : 1,4 à 4,4 années (Fec = 1,240).
Vulnérabilité (Ref. 59153):  Moderate to high vulnerability (51 of 100) .
Catégorie de prix (Ref. 80766):   Unknown.