Aves |
Charadriiformes |
Alcidae
Environment: milieu / climate zone / depth range / distribution range
Ecology
Others; depth range 0 - 60 m (Ref. 62202), usually 20 - 30 m (Ref. 62202). Polar; 83°N - 24°N, 85°W - 71°E (Ref. 124582)
Arctic, Northern Atlantic and the Mediterranean. Boreal to polar.
Length at first maturity / Size / Weight / Age
Maturity: Lm ?  range ? - ? cm Max length : 30.0 cm TL male/unsexed; (Ref. 8812); max. published weight: 381.00 g (Ref. 356)
Culmen: 4.56 cm; tarsus: 2.88 cm; wing: 17.21 cm.
Total Length: 28 to 30 cm; Wingspan: 53 to 58 cm (Ref. 8812). Occupy the continental shelf; <100 km; exhibits plunge-diving feeding behavior (Ref. 356). In the North Sea off the east coast of Scotland and northern England, this species is known to feed on the sandeel, Ammodytes marinus and breeding birds spend approx. 80% of daylight period at sea, commonly in dense rafts. They form nesting colonies with breeding pairs sharing incubation and chick-rearing duties; surface-feeding by scooping prey from the water, they carry prey in their bills and feed their chicks with regurgitated food (Ref. 95711).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Barrett, R.T. and F. Rikardsen. 1992. (Ref. 4091)
IUCN Red List Status
(Ref. 130435: Version 2024-2)
CITES status (Ref. 108899)
Not Evaluated
Not Evaluated
Threat to humans
Human uses
| FishSource |
Tools
More information
Population dynamicsGrowthMax. ages / sizesLength-weight rel.Length-length rel.Length-frequenciesMass conversionRecruitmentAbundance Life cycleReproduction
Maturity
Fecundity
Spawning
Eggs
Egg development
Larvae
Larval dynamics
Human RelatedAquaculture profiles
Stamps, coins, misc.
Internet sources
Estimates based on models
Preferred temperature
(Ref.
115969): 0.5 - 11.8, mean 6.8 (based on 976 cells).
Resilience
High, minimum population doubling time less than 15 months (K=8.27-39.05).
Vulnerability
Low vulnerability (20 of 100).
Price category
Unknown.