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Ecology of Arapaima gigas
 
Main Ref. Sanchez, J., 1960
Remarks Has been known to occur at a temperature range of 26-31 °C, pH range of 7.5-7.8, oxygen levels of 2.40-5.60 cc/l. Occurs in small groups and is mainly diurnal (Ref. 9135).

Aquatic zones / Water bodies

Marine - Neritic Marine - Oceanic Brackishwater Freshwater
Marine zones / Brackish and freshwater bodies
  • supra-littoral zone
  • littoral zone
  • sublittoral zone
  • epipelagic
  • mesopelagic
  • epipelagic
  • abyssopelagic
  • hadopelagic
  • estuaries/lagoons/brackish seas
  • mangroves
  • marshes/swamps
  • rivers/streams
  • lakes/ponds
  • caves
  • exclusively in caves
Highighted items on the list are where Arapaima gigas may be found.

Habitat

Substrate
Substrate Ref.
Special habitats
Special habitats Ref.

Associations

Ref.
Associations
Associated with
Association remarks
Parasitism

Feeding

Feeding type mainly animals (troph. 2.8 and up)
Feeding type Ref. Soares, M.G.M., R.G. Almeida and W.T. Tunk, 1986
Feeding habit hunting macrofauna (predator)
Feeding habit Ref. Soares, M.G.M., R.G. Almeida and W.T. Tunk, 1986
Trophic Level(s)
Estimation method Original sample Unfished population Remark
Troph s.e. Troph s.e.
From diet composition 4.50 4.42 0.76 Troph of adults from 1 study.
From individual food items 4.50 0.80 Trophic level estimated from a number of food items using a randomized resampling routine.
Ref. Soares, M.G.M., R.G. Almeida and W.T. Tunk, 1986
(e.g. 346)
(e.g. cnidaria)
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