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The surveys have been used to produce seasonal maps showing the density of right whales (number of animals per square kilometer) throughout the U.S. east coast and Nova Scotia. [122] NOAA Fisheries maintains an interactive map of recent right whale sightings.
[126] [21] Until the capture of these whales was banned in Canada and the US in 1976, the number of whales was reduced significantly. [125] Michael Bigg censused a total of 67 southern residents in 1976. 53 were older orcas, and 14 were assessed by size to be "young"—born during the capture period or after the last southern resident capture ...
The sanctuary encompasses 1,400 square miles (3,600 km 2) in the islands' waters.It was designated by United States Congress on November 4, 1992, as a National Marine Sanctuary to protect the endangered North Pacific humpback whale and its habitat [2] The sanctuary promotes management, research, education and long-term monitoring.
Northern resident orcas, also known as northern resident killer whales (NRKW), are one of four separate, non-interbreeding communities of the exclusively fish-eating ecotype of orca in the northeast portion of the North Pacific Ocean.
The northern residents number over 300 whales. They demonstrate seasonal shifts, generally inhabiting Chatham Sound in summer, Johnstone Strait in fall, and the San Juan Islands in winter. [12] Northern resident orcas are divided into three clans totaling 16 pods, showing higher genetic diversity compared with southern residents.
Sperm whales have the largest brain mass of any animal on Earth, averaging 8,000 cm 3 (490 in 3) and 7.8 kg (17 lb) in mature males. [23] The brain to body mass ratio in some odontocetes, such as belugas and narwhals, is second only to humans. [24] In some whales, however, it is less than half that of humans: 0.9% versus 2.1%. [citation needed]
Whales are fully aquatic, open-ocean animals: they can feed, mate, give birth, suckle and raise their young at sea. Whales range in size from the 2.6 metres (8.5 ft) and 135 kilograms (298 lb) dwarf sperm whale to the 29.9 metres (98 ft) and 190 tonnes (210 short tons) blue whale, which is the
Fin whales in the Gulf of St. Lawrence, off the coast of Labrador. The fin whale is more prevalent in high-latitude regions than throughout the tropics.However, in the autumn, Northern Atlantic fin whale populations off the coast of Labrador appear to migrate to the Caribbean islands, passing through Bermuda [2] [3]