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Ecology of Oncorhynchus mykiss
 
Main Ref. Maitland, P.S. and R.N. Campbell, 1992
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).

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 Oncorhynchus mykiss may be found.

Habitat

Substrate
Substrate Ref.
Special habitats
Special habitats Ref.

Associations

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

Feeding

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)
Estimation method Original sample Unfished population Remark
Troph s.e. Troph s.e.
From diet composition 4.08 0.28 Troph of adults from 3 studies.
From individual food items 3.53 0.63 Trophic level estimated from a number of food items using a randomized resampling routine.
Ref. Lebrasseur, R.J., 1965
(e.g. 346)
(e.g. cnidaria)
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