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Porpoises produce ultrasonic clicks, which are used for both navigation (echolocation) and social communication. In contrast to many dolphin species, porpoises do not form large social groups. Porpoises were, and still are, hunted by some countries by means of drive hunting.
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]
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 problem for the vaquita is that the fishing nets used to wrangle in totoaba are a good size for the endangered porpoises to get caught and die in. 'Aquatic cocaine' may push smallest porpoise ...
Burmeister's porpoises frequent inshore bays, channels, and fjords, [1] but individuals have been spotted as far as 50 km (31 mi) from the shore and in the freshwater Valdivia River in southern Chile. [1] Though normally found in continental shelf waters, they have been found as deep as 1,000 m (3,300 ft) [1]
The Auburn men's basketball team is going to be a little late getting into Houston. The Tigers' flight west had to be turned around due to mid-trip "horseplay" between a group of players that ...
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.