Common names from other countries
Environment: milieu / climate zone / depth range / distribution range
Sinh thái học
Tầng nổi; Ở đại duơng, biển (Ref. 75906); Mức độ sâu 0 - 16 m (Ref. 116169). Temperate; 90°N - 90°S, 180°W - 180°E
North Atlantic: Balaena glacialis glacialis: Davis Strait, Denmark Strait, Norwegian Sea south to Massachusetts and the Bay of Biscay, south to Florida and the Golfo de Cintra, Western Sahara, Gulf of Mexico, Sea of Okhotsk, southern Bering Sea, northern Gulf of Alaska, south to the Sea of Japan, Pacific coast of northern Honshu and the coast of central California, Taiwan, Baja California Sur, Hawaiian Islands; Balaena glacialis australis: Subantarctic zone, between 35° to 40°S and 55° to 60°S, southern Brazil to northern Argentina, Tristan da Cunha, Namibia, southern Mozambique to Cape Province, St Paul Island, Southwest and southeast Australia, Kermadec Island, central Chile (Ref. 1522). Temperate, subpolar.
Length at first maturity / Bộ gần gũi / Khối lượng (Trọng lượng) / Age
Maturity: Lm ?, range 1,250 - 1550 cm Max length : 1,800 cm TL con đực/không giới tính; (Ref. 1394); Khối lượng cực đại được công bố: 100.0 t (Ref. 1394)
The northern right whale is one of the stockiest of all whales. It has a massive head that can be up to nearly one-third of its body length. The jaw line is arched and the upper jaw is very narrow in dorsal view. The flippers are broad and tend to be more fan-shaped than the pointed flippers of most other cetaceans. There is no dorsal fin or dorsal ridge on the broad back. The flukes are very wide and smoothly tapered, with a smooth trailing edge and a deep notch. Most right whales are predominantly black, but there may be large white splotches of varying extent on the belly and chin. The head is covered with callosities, areas of roughened skin to which whale lice and sometimes barnacles attach. The largest of these callosities, on the top of the rostrum, is called the bonnet. The widely separated blowholes produce a Vshaped blow up to 5 m high. Inside the mouth are 200 to 270 long thin baleen plates. Which may reach nearly 3 m in length. They are brownish grey to black in colour. The fringes of these plates are very fine, reflecting the small prey taken by this species.
The right whales were the first targets of commercial whaling, starting in the eleventh century. They were sought after because of their thick blubber layer (and thus high yield of oil), long flexible baleen (used for many of the same purposes as plastic is today), slow swimming speeds, and tendency to float when killed. North Pacific right whales were depleted to near extinction by commercial whaling, the most recent episodes of which occurred as scientific whaling about 20 years ago. Sightings today are rare, apparently the species is not recovering, even under full protection (Ref. 1394).
The mating system appears to involve sperm competition (males competing to inseminate females, not so much by physical aggression, as by delivering large loads of sperm, thereby displacing that of other males). Young are born in winter and spring in tropical or subtropical breeding areas.
Jefferson, T.A., S. Leatherwood and M.A. Webber. 1993. (Ref. 1394)
IUCN Red List Status (Ref. 130435: Version 2024-1)
CITES status (Ref. 108899)
Human uses
Các nghề cá: tính thương mại cao
FAO - Các nghề cá: landings, species profile | FishSource | Biển chung quanh ta
Các công cụ
Các nguồn internet
Estimates based on models
Preferred temperature
(Ref.
115969): 0.7 - 13.1, mean 6.4 (based on 720 cells).
Thích nghi nhanh
thấp, thời gian nhân đôi của chủng quần tối thiểu là 4.5 - 14 năm (K=0.1; tm=10).
Vulnerability
Very high vulnerability (84 of 100).
Price category
Unknown.
