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Harbour porpoises tend to be solitary foragers, but they do sometimes hunt in packs and herd fish together. [11] Young porpoises need to consume about 7% to 8% of their body weight each day to survive, which is approximately 15 pounds or 7 kilograms of fish. Significant predators of harbour porpoises include white sharks and killer whales (orcas
Porpoises (/ ˈ p ɔː r p ə s ɪ z /) are small dolphin-like cetaceans classified under the family Phocoenidae. Although similar in appearance to dolphins , they are more closely related to narwhals and belugas than to the true dolphins . [ 1 ]
Dall's porpoises live in small, fluid groups of two to ten individuals, [7] but aggregations of hundreds have been reported. [11] They have a polygynous mating system in which males compete for females. [14] During the mating season, a male will select a fertile female and guard her to ensure paternity. [14]
The International Whaling Commission released its first ever extinction alert to raise awareness surrounding the decreasing vaquita porpoise population.
The Yangtze finless porpoise (Neophocaena asiaeorientalis) is a species of toothed whale in the family Phocoenidae, the porpoise family.It is endemic to the Yangtze River in China, making it the country's only known freshwater cetacean following the possible extinction of the baiji (Lipotes vexillifer), a freshwater dolphin also native to the Yangtze. [3]
Cetacea (/ s ɪ ˈ t eɪ ʃ ə /; from Latin cetus 'whale', from Ancient Greek κῆτος () 'huge fish, sea monster') [3] is an infraorder of aquatic mammals belonging to the order Artiodactyla that includes whales, dolphins and porpoises.
As an informal and colloquial grouping, they correspond to large members of the infraorder Cetacea, i.e. all cetaceans apart from dolphins and porpoises. Dolphins and porpoises may be considered whales from a formal, cladistic perspective. Whales, dolphins and porpoises belong to the order Cetartiodactyla, which consists of even-toed ungulates.
AAPL Market Cap data by YCharts. Other noteworthy examples include selling out of oil and gas stocks during the downturn of 2020. In the last four years, the energy sector is up 129%.