Ecology of Oncorhynchus tshawytscha
 
Main Ref. Scott, W.B. and E.J. Crossman, 1973
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 tshawytscha may be found.
Remarks Adults return to natal streams from the sea to spawn (Ref. 27547). Fry may migrate to the sea after only 3 months in fresh water, some may stay for as long as 3 years, but generally most stay a year in the stream before migrating (Ref. 27547). Some individuals remain close inshore throughout their lives, but some make extensive migrations (Ref. 27547, 44894).

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 Scott, W.B. and E.J. Crossman, 1973
Feeding habit hunting macrofauna (predator)
Feeding habit ref
Trophic level(s)
Original sample Unfished population Remark
Estimation method Troph s.e. Troph s.e.
From diet composition 4.40 0.66 4.44 0.78 Troph of juv./adults from 1 study.
Ref. Jude, D.J., F.J. Tesar, S.F. Deboe and T.J. Miller, 1987
From individual food items 3.83 0.67 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 04.08.97
Modified by Casal, Christine Marie V. on 09.17.15
Checked by Sta. Iglesia, Drina on 05.28.01
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