Ecology Summary - Dosidicus gigas
Back to search
More info | Plus d'info. | Mais info

Ecology of Dosidicus gigas
 
Main Ref. Roper, C.F.E., M.J. Sweeney and C.E. Nauen, 1984
Remarks Inhabits offshore areas of continental shelves from surface to depths of at least 1200 m. Found over the shelves and near shores during feeding. Adults undergo diel vertical migrations with a night lift to the 0-200 m water layer, going down at daytime to depths of 800-1,000 m and deeper (Ref. 2130). Upper temperature limits range from 30 to 32°C in equatorial areas, while deeper water temperature limits are not less than 4 to 4.5°C. Active predator, feeds actively at dusk and dawn. Commonly feeds on copepods, hyperiid amphipods, euphausiids, pelagic shrimps and red crabs (Pleuroncodes planipes), heteropod mollusks, squid, octopods and various fish. Exhibits cannibalism, but only on juvenile squids (Ref. 1982).

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 Dosidicus gigas may be found.

Habitat

Substrate Pelagic;
Substrate Ref. Roper, C.F.E., M.J. Sweeney and C.E. Nauen, 1984
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.
Feeding habit hunting macrofauna (predator)
Feeding habit Ref.

Trophic Level(s)

Estimation method original sample unfished population Remark
Troph s.e. Troph s.e.
From diet composition 4.15 0.54 Troph of juv./adults.
From individual food items 4.11 0.67 Trophic level estimated from a number of food items using a randomized resampling routine.
Ref. Markaida, U. and O. Sosa-Nishizaki, 2003
Ref. [ e.g. 3742]
Glossary [ e.g. cnidaria]
Back to Search
Comments & Corrections