Overview

Comprehensive Description

Biology

Adults inhabit streams and lakes (Ref. 59043). Males build, guard and aerate the nest where the eggs are deposited (Ref. 205).
  • Kottelat, M. and J. Freyhof 2007 Handbook of European freshwater fishes. Publications Kottelat, Cornol, Switzerland. 646 p. (Ref. 59043)
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Distribution

Range Description

Iceland; some populations with low scute number in Norway and northern Finland possibly belong to this species.
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Europe: Iceland. Some populations in Norway and northern Finland with low scute number possibly refer to this species.
  • Kottelat, M. and J. Freyhof 2007 Handbook of European freshwater fishes. Publications Kottelat, Cornol, Switzerland. 646 p. (Ref. 59043)
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Iceland.
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Physical Description

Size

Max. size

5.5 cm SL (male/unsexed; (Ref. 59043))
  • Kottelat, M. and J. Freyhof 2007 Handbook of European freshwater fishes. Publications Kottelat, Cornol, Switzerland. 646 p. (Ref. 59043)
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Diagnostic Description

Distinguished uniquely from congeners in Europe by having a deep notch on the anterior margin of pelvic girdle. Differs further from other members of the genus by having the following combination of characters: trunk with 2-15 scutes; and scutes forming a lateral keel on caudal peduncle or keel absent. Morphological differences are reported in several lakes between individuals occurring in different substrates (mud, lava), especially in Lake Thingvalla (Ref. 59043).
  • Kottelat, M. and J. Freyhof 2007 Handbook of European freshwater fishes. Publications Kottelat, Cornol, Switzerland. 646 p. (Ref. 59043)
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
Habitat:
Streams and lakes.

Biology:
No information. Most likely similar to G. aculeatus. Morphological differences are reported in several lakes between individuals inhabiting different substrates (mud, lava), especially in Lake Thingvalla.

Systems
  • Freshwater
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Environment

benthopelagic; freshwater
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Life History and Behavior

Life Cycle

Males build, guard and aerate the nest where the eggs are deposited (Ref. 205).
  • Breder, C.M. and D.E. Rosen 1966 Modes of reproduction in fishes. T.F.H. Publications, Neptune City, New Jersey. 941 p. (Ref. 205)
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2008

Assessor/s
Freyhof, J. & Kottelat, M.

Reviewer/s
Bogutskaya, N., & Smith, K. (IUCN Freshwater Biodiversity Unit)

Contributor/s

Justification
A widespread species with no known major widespread threats.
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Population

Population
Abundant.

Population Trend
Unknown
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Threats

Major Threats
No major threats known.
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Least Concern (LC)
  • IUCN 2006 2006 IUCN red list of threatened species. www.iucnredlist.org. Downloaded July 2006.
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Management

Conservation Actions

Conservation Actions
No information.
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