Ecology Summary - Salvelinus namaycush

Language:

Main Ref.	Scott, W.B. and E.J. Crossman, 1973
Remarks	Found in shallow and deep waters of northern lakes and streams and is restricted to relatively deep lakes in the southern part of its range (Ref. 5723). Rarely in brackish water (Ref. 11980). A solitary wanderer, the extent of their movements apparently limited by the size of the lake and individual (Ref. 27547). Although lake trout generally feed on a variety of organisms such as freshwater sponges, crustaceans, insects, fishes (with a preference for ciscoes), and small mammals, some populations feed on plankton throughout their lives (Ref. 27547). Such plankton-feeding lake trout grow more slowly, mature earlier and at smaller size, die sooner and attain smaller maximum size than do their fish-eating counterparts (Ref. 30351). Juveniles feed on invertebrates (Ref. 1998).

Main Ref.

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

Remarks

Found in shallow and deep waters of northern lakes and streams and is restricted to relatively deep lakes in the southern part of its range (Ref. 5723). Rarely in brackish water (Ref. 11980). A solitary wanderer, the extent of their movements apparently limited by the size of the lake and individual (Ref. 27547). Although lake trout generally feed on a variety of organisms such as freshwater sponges, crustaceans, insects, fishes (with a preference for ciscoes), and small mammals, some populations feed on plankton throughout their lives (Ref. 27547). Such plankton-feeding lake trout grow more slowly, mature earlier and at smaller size, die sooner and attain smaller maximum size than do their fish-eating counterparts (Ref. 30351). Juveniles feed on invertebrates (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 Salvelinus namaycush may be found.

Habitat

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

Trophic Level(s)

Estimation method	Original sample		Unfished population		Remark
Estimation method	Troph	s.e.	Troph	s.e.	Remark
From diet composition	4.29	0.51	4.48	0.81	Troph of juv./adults from 1 study.
From individual food items	3.77	0.61			Trophic level estimated from a number of food items using a randomized resampling routine.
Ref.	Jude, D.J., F.J. Tesar, S.F. Deboe and T.J. Miller, 1987

Back to Search

cfm script by eagbayani, , php script by rolavides, 2/5/2008 , last modified by mbactong, 10/24/19