Ecology Summary - Cottus aleuticus

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Main Ref.	Scott, W.B. and E.J. Crossman, 1973
Remarks	Inhabits gravel and rubble riffles of medium to large rivers and rocky shores of lakes (Ref. 5723). Occasionally enters estuaries (Ref. 5723). Feeds mostly at night and mostly on aquatic insects and benthic invertebrates (Ref. 27547). Generally solitary but large aggregations have been noted (Ref. 27547). Makes regular seasonal migrations associated with spawning (Ref. 27547). Considered a forage fish for some salmonids (Ref. 1998).

Main Ref.

Scott, W.B. and E.J. Crossman, 1973

Remarks

Inhabits gravel and rubble riffles of medium to large rivers and rocky shores of lakes (Ref. 5723). Occasionally enters estuaries (Ref. 5723). Feeds mostly at night and mostly on aquatic insects and benthic invertebrates (Ref. 27547). Generally solitary but large aggregations have been noted (Ref. 27547). Makes regular seasonal migrations associated with spawning (Ref. 27547). Considered a forage fish for some salmonids (Ref. 1998).

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 Cottus aleuticus may be found.

Habitat

Substrate	Hard Bottom: rocky; rubble;
Substrate Ref.	Page, L.M. and B.M. Burr, 1991
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)

Estimation method	Original sample		Unfished population		Remark
Estimation method	Troph	s.e.	Troph	s.e.	Remark
From diet composition	3.20	0.26	3.09	0.36	Troph of juv./adults from 1 study.
From individual food items	3.35	0.46			Trophic level estimated from a number of food items using a randomized resampling routine.
Ref.	Brown, L.R., S.A. Matern and P.B. Moyle, 1995

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