Aves |
Pelecaniformes |
Phalacrocoracidae
Environment: milieu / climate zone / تغييرات عمق / distribution range
بوم شناسي
. Subtropical; 67°N - 27°N, 26°W - 40°E (مرجع 125423)
Arctic, Northeast Atlantic and the Mediterranean. Subtropical to polar.
Length at first maturity / Size / Weight / سن
بلوغ: Lm ?  range ? - ? cm Max length : 72.0 cm TL جنس نر / بدون خواص جنسي; (مرجع 84934); بيشينه وزن گزارش شده: 1.6 kg (مرجع 356)
Culmen: 5.67 cm; tarsus: 6.34 cm; wing: 26.45 cm.
In the North Sea off the east coast of Scotland and northern England, this species primarily forage inshore and breeding birds only spend approx. 30% of daylight period at sea, feeding primarily on the sandeel, Ammodytes marinus. They surface-feed by scooping prey from the water and also able to exploit the water column by diving. They form nesting colonies with breeding pairs sharing incubation and chick-rearing duties. Adults feed their chicks with regurgitated food (Ref. 95711).
Life cycle and mating behavior
بلوغ | تولید مثل | تخم ریزی | Eggs | Fecundity | Larvae
مآخذ اصلی
مراجع | هماهنگ كننده | همكاران
Amundsen, T. and J.N. Stokland 1990 Egg size and parental quality influence nestling growth in the shag. The Auk 107:410-413. (مرجع 91589)
وضعيت در فهرست قرمز IUCN
(مرجع 130435: Version 2025-1)
وضعيت از نظر سايتس (مرجع 108899)
Not Evaluated
Not Evaluated
خطر برای انسان ها
استفاده انسانی
| FishSource |
ابزارها
اطلاعات بيشتر
Population dynamicsرشدMax. ages / sizesLength-weight rel.Length-length rel.نوسانات طولیMass conversionفراواني Life cycleتولید مثل
بلوغ
Fecundity
تخم ریزی
Eggs
نمو تخم
Larvae
PhysiologyOxygen consumption
Human RelatedStamps, coins, misc.
منابع اينترنتي
Estimates based on models
Preferred temperature
(Ref.
115969): 6.5 - 19.6, mean 12.3 (based on 985 cells).
جهندگی
زياد, كمينه زمان لازم براي دو برابر شدن جمعيت ، كمتر از 15 ماه (K=14.9-42.87).
Fishing Vulnerability
Moderate to high vulnerability (49 of 100).
طبقه قيمت
Unknown.