Mammalia |
Carnivora |
Phocidae
Environment: milieu / climate zone / تغييرات عمق / distribution range
بوم شناسي
موجوداتی که در اعماق زیر 200 متر زندگی و تغذیه می کنند. Subtropical; 90°N - 0°S, 126°E - 115°W
Pacific Ocean and the Arctic: Eastern side of Ostrov Sakhalin to northern Hokkaido. Subtropical to polar.
Length at first maturity / Size / Weight / سن
بلوغ: Lm ? range ? - ? cm Max length : 170 cm TL جنس نر / بدون خواص جنسي; (مرجع 1394); 160 cm TL (female); بيشينه وزن گزارش شده: 123.0 kg (مرجع 1394)
Inhabit the southern edges of the pack ice from winter to early summer and coastal areas including river mouths, in late summer and autumn. Diet composition varies with the age of the seal; Newly weaned pups feed on small crustaceans, advance to schooling fishes, larger crustaceans, and octopuses, and finally graduate to bottom dwelling fish and cephalopods (Ref. 1394). Inhabits the southern edges of the pack ice from winter to early summer and coastal areas including river mouths, in late summer and autumn. Diet composition varies with the age of the seal; newly weaned pups feed on small crustaceans, advance to schooling fishes, larger crustaceans, and octopuses, and finally graduate to bottom dwelling fish and cephalopods (Ref. 1394). Those in their first year tend to eat mostly small crustaceans, algae, sticks and debris; 1 to 4 year olds mostly eat fishes, larger shrimps, and octopus, occasionally; 5 year olds consumed more benthic invertebrates like crabs and octopus (Ref. 119414).
Life cycle and mating behavior
بلوغ | تولید مثل | تخم ریزی | Eggs | Fecundity | Larvae
مآخذ اصلی
مراجع | هماهنگ كننده | همكاران
Jefferson, T.A., S. Leatherwood and M.A. Webber 1993 FAO species Identification Guide: Marine Mammals of the World. Rome, FAO. 320 p. + 587 figures. (مرجع 1394)
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
ماهي گيري – شيلات: تجاري
FAO - ماهي گيري – شيلات: landings, نمايه گونه | FishSource | Sea Around Us
ابزارها
اطلاعات بيشتر
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): -0.6 - 5.6, mean 2.2 (based on 1984 cells).
جهندگی
متوسط, كمينه زمان لازم براي دو برابر شدن جمعيت 4/1 – 4/4 سال (K=0.16-0.44).
Fishing Vulnerability
High to very high vulnerability (72 of 100).
طبقه قيمت
Unknown.
