Search results
Results from the WOW.Com Content Network
Porpoises, and other cetaceans, belong to the clade Cetartiodactyla with even-toed ungulates. Porpoises range in size from the vaquita, at 1.4 metres (4 feet 7 inches) in length and 54 kilograms (119 pounds) in weight, to the Dall's porpoise, at 2.3 m (7 ft 7 in) and 220 kg (490 lb).
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
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]
Porpoises, divided into seven species, live in all oceans. They span from species that live almost exclusively coastal and in rivers ( finless porpoises ) to species that are entirely oceanic ( spectacled porpoise ).
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]
The number of Mexico’s critically endangered vaquita marina porpoises sighted in the Gulf of California fell to between 6 and 8 this year, researchers said Tuesday. Last year, experts on a ...
The gestation period usually last for one year. Individuals are believed to live up 40 years or more. [6] The Pacific white-sided dolphin is extremely active and mixes with many of the other North Pacific cetacean species. It readily approaches boats and bow-rides. Large groups are common, averaging 90 individuals, with supergroups of more than ...
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!