Ecology Summary - Urophycis tenuis

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Main Ref.	Pauly, D., 1989
Remarks	Found on soft, muddy bottoms of the continental shelf and upper slope. It is mostly found at 180 m (Ref. 4587); prefers 5-11°C (Ref. 5951). Mature fish migrate inshore in the northern Gulf of Maine in summer, disperse in autumn, and move into deepest areas in winter (Ref. 4587). Feeds on fishes like clupeids (especially Atlantic herring) and gadids (mainly silver hake, red hake and longfin hake; Atlantic mackerel, argentines and wrymouth); crustaceans (particularly pandalid shrimps). Parasites of the species include 2 protozoans, 3 myxosporidians, 1 trematode, 1 nematode (sealworm, Phocanema decipiens) and 1 copepod (Ref. 5951). See also Ref. 8999.

Main Ref.

Pauly, D., 1989

Remarks

Found on soft, muddy bottoms of the continental shelf and upper slope. It is mostly found at 180 m (Ref. 4587); prefers 5-11°C (Ref. 5951). Mature fish migrate inshore in the northern Gulf of Maine in summer, disperse in autumn, and move into deepest areas in winter (Ref. 4587). Feeds on fishes like clupeids (especially Atlantic herring) and gadids (mainly silver hake, red hake and longfin hake; Atlantic mackerel, argentines and wrymouth); crustaceans (particularly pandalid shrimps). Parasites of the species include 2 protozoans, 3 myxosporidians, 1 trematode, 1 nematode (sealworm, Phocanema decipiens) and 1 copepod (Ref. 5951). See also Ref. 8999.

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 Urophycis tenuis may be found.

Habitat

Substrate	Soft Bottom
Substrate Ref.
Special habitats
Special habitats Ref.

Associations

Ref.
Associations	schooling; shoaling;
Associated with
Association remarks	Survey data indicate that mature adult females aggregate on the southwest Grand Bank slope in spring and first-year juveniles settle on the southern, shallow Grand Bank nursery in autumn (Ref. 94937). Depth distribution varies by age and season; individuals of all ages tend to move inshore or shoalward in summer, dispersing to deeper areas in winter. Canadian Atlantic population seem to spawn sporadically, but there is a tendency for mass seasonal spawning in the SW Gulf of St. Lawrence in summer; some seasonal movement away from Prince Edward Island in winter (Ref. 86779).
Parasitism

Feeding

Feeding type	mainly animals (troph. 2.8 and up)
Feeding type Ref.	Pauly, D., 1989
Feeding habit	variable
Feeding habit Ref.	Pauly, D., 1989

Trophic Level(s)

Estimation method	Original sample		Unfished population		Remark
Estimation method	Troph	s.e.	Troph	s.e.	Remark
From diet composition	4.27	0.54	4.23	0.74	Troph of juv./adults from 2 studies.
From individual food items	3.27	0.46			Trophic level estimated from a number of food items using a randomized resampling routine.
Ref.	Langton, R.W. and R.E. Bowman, 1980

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