Aves |
Gaviiformes |
Gaviidae
Environment: milieu / climate zone / تغييرات عمق / distribution range
بوم شناسي
. Subtropical; 78°N - 33°N, 3°E - 80°W (مرجع 124582)
Northern and Central Pacific, Atlantic and the Arctic. Polar to subtropical.
Length at first maturity / Size / Weight / سن
بلوغ: Lm ? range ? - ? cm
Found on beach and shoreline (Ref. 116102). Inhabits lakes and lakeshores. Feeds primarily on fish and minimally on plant material. Breeding pairs highly territorial, employing specific vocalizations and aggressive displays and postures when sensing threat. Copulation takes place on land. The male selects the nest site; egg clutch incubation approx. 27 days with both parents taking turns. Typical brood number, 2; with both parents feeding the young; commonly, only one of the 2 survives probably due to competition for food within the brood (Ref. 95186).
Life cycle and mating behavior
بلوغ | تولید مثل | تخم ریزی | Eggs | Fecundity | Larvae
مآخذ اصلی
مراجع | هماهنگ كننده | همكاران
Lepage, D. 2007 Avibase -the World Bird Database. http://www.bsc-eoc.org/avibase/avibase.jsp [accessed 09/07/2007]. (مرجع 7816)
وضعيت در فهرست قرمز IUCN
(مرجع 130435: Version 2025-1)
وضعيت از نظر سايتس (مرجع 108899)
Not Evaluated
خطر برای انسان ها
Harmless
استفاده انسانی
| FishSource |
ابزارها
اطلاعات بيشتر
Population dynamicsرشد
Max. ages / sizes
Length-weight rel.
Length-length rel.
نوسانات طولی
Mass conversion
فراواني
Life cycleتولید مثل
بلوغ
Fecundity
تخم ریزی
Eggs
نمو تخم
Larvae
PhysiologyOxygen consumption
Human RelatedStamps, coins, misc.
منابع اينترنتي
Estimates based on models
