Ecology of Oncorhynchus mykiss
Main Ref. Maitland, P.S. and R.N. Campbell, 1992
Marine - Neritic
  • supra-littoral zone
  • littoral zone
  • sublittoral zone
Marine - Oceanic
  • 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 Oncorhynchus mykiss may be found.
Remarks Anadromous (Ref. 5951). Young rainbow trout feed predominantly on zooplankton (Ref. 26523). Rainbow trout of all sizes fed mainly on midge (adults, larvae and pupae). As the fish grew larger, terrestrial prey became the most important food item (Ref. 55755). Possible cohabitation with G. olidus (Ref. 26860). Rainbow trout also have sea dwelling populations known as 'steelhead' (Ref. 6390).


Substrate Ref.
Special habitats
Special habitats Ref.


Associated with
Association remarks Parasites found are Echinorhynchus lateralis, Crepidostomum farionis, Eubothrium salvelini, Trichophyra piscium, Dibothriocephalus sp., Lepeophtheirus salmonis and Caligus elongatus (Ref. 5951).


Feeding type mainly animals (troph. 2.8 and up)
Feeding type ref Cadwallader, P.L. and G.N. Backhouse, 1983
Feeding habit hunting macrofauna (predator)
Feeding habit ref Cadwallader, P.L. and G.N. Backhouse, 1983
Trophic level(s)
Original sample Unfished population Remark
Estimation method Troph s.e. Troph s.e.
From diet composition 4.08 0.28 Troph of adults from 3 studies.
Ref. Lebrasseur, R.J., 1965
From individual food items 3.53 0.63 Trophic level estimated from a number of food items using a randomized resampling routine.
(e.g. 346)
(e.g. cnidaria)
Entered by Torres, Armi G. on 12.09.92
Modified by Pablico, Grace Tolentino on 11.13.07
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