Ecology of Cottus cognatus
 
Main Ref. Scott, W.B. and E.J. Crossman, 1998
Distribution
Marine - Neritic
  • supra-littoral zone
  • littoral zone
  • sublittoral zone
Marine - Oceanic
  • epipelagic
  • mesopelagic
  • epipelagic
  • abyssopelagic
  • hadopelagic
Brackishwater
  • estuaries/lagoons/brackish seas
  • mangroves
  • marshes/swamps
Freshwater
  • rivers/streams
  • lakes/ponds
  • caves
  • exclusively in caves
Highighted items on the list are where Cottus cognatus may be found.
Remarks Inhabits rocky riffles of cold streams, rocky areas of lakes (commonly at 90-106 m depth), springs and their effluents (Ref. 5723). Occurs in rocky reefs, prefering rock substrate for protection from common predators (Ref. 46644). Moves into shallow water to spawn (Ref. 27547). In some areas, they are common in brackish water (Ref. 27843), presumably moving to and from fresh water, at least for spawning (Ref. 27547). Feeds mostly on aquatic insect larvae and nymphs but also on crustaceans, small fishes, and plant materials (Ref. 1998).

Substrate

Substrate Hard Bottom: rocky;
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, 1998
Feeding habit hunting macrofauna (predator)
Feeding habit ref Scott, W.B. and E.J. Crossman, 1998
Trophic level(s)
Original sample Unfished population Remark
Estimation method Troph s.e. Troph s.e.
From diet composition
Ref.
From individual food items 3.37 0.47 Trophic level estimated from a number of food items using a randomized resampling routine.
(e.g. 346)
(e.g. cnidaria)
Entered by Sa-a, Pascualita on 03.25.97
Modified by Pablico, Grace Tolentino on 08.01.07
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