Ecology Summary - Doryteuthis opalescens

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Ecology Summary - Doryteuthis opalescens

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Ecology of Doryteuthis opalescens

Main Ref.	Roper, C.F.E., M.J. Sweeney and C.E. Nauen, 1984
Remarks	Individual behavior: pale coloration indicates relaxation while dark, high contrast chromatic elements indicate alertness; protracted inking occurs after an abrupt stop from a backward jetting squid; in swimming, drag is reduced from the tightening of fin curvature which reduces the fin span relative to the average fin chord; fins and arms were used to maneuver. Schooling and shoaling: schools at night were tighter than during the day (Ref. 94861).

Main Ref.

Roper, C.F.E., M.J. Sweeney and C.E. Nauen, 1984

Remarks

Individual behavior: pale coloration indicates relaxation while dark, high contrast chromatic elements indicate alertness; protracted inking occurs after an abrupt stop from a backward jetting squid; in swimming, drag is reduced from the tightening of fin curvature which reduces the fin span relative to the average fin chord; fins and arms were used to maneuver. Schooling and shoaling: schools at night were tighter than during the day (Ref. 94861).

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 Doryteuthis opalescens may be found.

Habitat

Substrate	Benthic: mobile; demersal; Soft Bottom: sand; mud;
Substrate Ref.	Gotshall, D.W., 2005
Special habitats
Special habitats Ref.

Associations

Ref.	Roper, C.F.E., M.J. Sweeney and C.E. Nauen, 1984
Associations
Associated with
Association remarks
Parasitism

feeding

Feeding type	mainly animals (troph. 2.8 and up)
Feeding type Ref.	Karpov, K.A. and G.M. Cailliet, 1979
Feeding habit	hunting macrofauna (predator)
Feeding habit Ref.	Karpov, K.A. and G.M. Cailliet, 1979

Trophic Level(s)

Estimation method	original sample		unfished population		Remark
Estimation method	Troph	s.e.	Troph	s.e.	Remark
From diet composition
From individual food items	3.74	0.60			Trophic level estimated from a number of food items using a randomized resampling routine.
Ref.

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