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Ecology of Oncorhynchus keta
 
Main Ref. Karpenko, V.I. and E.T. Nikolaeva, 1989
Distribution
Marine - Neritic
  • supra-littoral zone
  • littoral zone
  • sublittoral zone
 Marine - Oceanic
  • epipelagic
  • mesopelagic
  • epipelagic
  • abyssopelagic
  • hadopelagic
 Brackishwater
  • estuaries/lagoons/brackish seas
  • mangroves
  • marshes/swamps
 Freshwater
  • rivers/streams
  • lakes/ponds
  • caves
  • exclusively in caves
Highighted items on the list are where Oncorhynchus keta may be found.
Remarks Juveniles are typically euryphagous. They feed on planktonic and benthic organisms. Food spectrum narrows during migration from the river to the sea. Diet composition is determined by river conditions and by the hydrological conditions of the coastal region of the sea, particularly the water level in the river and the tide cycle, as well as illumination at night (Ref. 9027).

Substrate

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 Karpenko, V.I. and E.T. Nikolaeva, 1989
Feeding habit hunting macrofauna (predator)
Feeding habit ref Karpenko, V.I. and E.T. Nikolaeva, 1989
Trophic level(s)
Original sample Unfished population Remark
Estimation method Troph s.e. Troph s.e.
From diet composition 3.74 0.19 3.45 0.46 Troph of juv./adults from 3 studies.
Ref. Sobolevskii, E.I. and I.A. Senchenko, 1996
From individual food items 3.42 0.41 Trophic level estimated from a number of food items using a randomized resampling routine.
(e.g. 346)
(e.g. cnidaria)
Entered by Sa-a, Pascualita on 03.20.95
Modified by Pablico, Grace Tolentino on 10.20.04
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