Ecology Summary - Gymnocephalus acerina

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Main Ref.	Kottelat, M. and J. Freyhof, 2007
Remarks	Found in flowing waters and lakes with clear water. Also inhabits rapids during summer. Occurs over sand and gravel bottom but prefers hard compact sand. Usually crepuscular but feeds also during daytime. Preys predominantly on benthic invertebrates (crustaceans, insect larvae, molluscs), rarely on fish. Forms small schools. In September, this species starts forming large schools and moves to deeper places and remains inactive until ice melts. Does not undertake long distance migrations (Ref.59043).

Main Ref.

Kottelat, M. and J. Freyhof, 2007

Remarks

Found in flowing waters and lakes with clear water. Also inhabits rapids during summer. Occurs over sand and gravel bottom but prefers hard compact sand. Usually crepuscular but feeds also during daytime. Preys predominantly on benthic invertebrates (crustaceans, insect larvae, molluscs), rarely on fish. Forms small schools. In September, this species starts forming large schools and moves to deeper places and remains inactive until ice melts. Does not undertake long distance migrations (Ref.59043).

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 Gymnocephalus acerina 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.	Kottelat, M. and J. Freyhof, 2007
Feeding habit	hunting macrofauna (predator)
Feeding habit Ref.	Kottelat, M. and J. Freyhof, 2007

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	3.61	0.53			Trophic level estimated from a number of food items using a randomized resampling routine.
Ref.

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