Mammalia |
Cetartiodactyla |
Eschrichtiidae
Environment: milieu / climate zone / تغييرات عمق / distribution range
بوم شناسي
سطح زی; اقیانوس رو (مرجع 75906); تغييرات عمق 1 - 2500 m, usually 30 - 500 m. Tropical; 90°N - 0°S, 115°E - 105°W
Pacific Ocean, Atlantic Ocean and the Arctic: Extinct in North Atlantic; two populations in North Pacific. Tropical to polar. [western population: IUCN 2010 (Ref. 84930): CR, C2a(ii);E.]
Length at first maturity / Size / Weight / سن
بلوغ: Lm 1,220.0 range ? - ? cm Max length : 1,500 cm TL جنس نر / بدون خواص جنسي; (مرجع 1394); بيشينه وزن گزارش شده: 35.0 t (مرجع 1394); بيشينه سن گزارش شده: 48 سال ها (مرجع 128170)
Lives within a few tens of kilometers of shore. Bottom feeders that feed primarily on swarming mysids and tube-dwelling amphipods in the northern parts of their range, but are also known to take red crabs, baitfish, and other food opportunistically. The North Atlantic stock was apparently wiped-out by whalers in the 18th century. A western North Pacific (Korean) stock may also have been extirpated in the mid 20th century; its continued existence as a small remnant is still debated. The eastern North Pacific (California-Chukotka) stock nearly suffered the same fate twice, once in the late 1800s and again in the early 1900s. Both times, a respite in commercial whaling allowed the population to recover. About 170 to 200 from this latter stock are killed annually under special permit by commercial whalers on behalf of Soviet aborigines, and one or a few are taken in some years by Alaskan Eskimos. Since receiving IWC protection in 1946 and the end of research harvests in the late 1960s this population has increased, and now apparently equals or exceeds pre-exploitation numbers (Ref. 1394). Lives within a few tens of kilometers of shore. Bottom feeders that feed primarily on swarming mysids and tube-dwelling amphipods in the northern parts of their range, but are also known to take red crabs, baitfish, and other food opportunistically (Ref. 1394).
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
خطر برای انسان ها
استفاده انسانی
ماهي گيري – شيلات: تجاري
FAO - ماهي گيري – شيلات: landings, نمايه گونه | FishSource | Sea Around Us
ابزارها
اطلاعات بيشتر
PhysiologyOxygen consumption
Human RelatedStamps, coins, misc.
منابع اينترنتي
Estimates based on models
Preferred temperature
(Ref.
115969): 0.4 - 17.3, mean 3.5 (based on 1706 cells).
جهندگی
متوسط, كمينه زمان لازم براي دو برابر شدن جمعيت 4/1 – 4/4 سال (K=0.19-0.25; tm=8; tmax=48).
Fishing Vulnerability
Very high vulnerability (79 of 100).
طبقه قيمت
Unknown.
