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Humpback whale breaching. Cetacean surfacing behaviour is a grouping of movement types that cetaceans make at the water's surface in addition to breathing. Cetaceans have developed and use surface behaviours for many functions such as display, feeding and communication.
Collisions with ships are a major cause of mortality. In some areas, they cause a substantial portion of large whale strandings. Most serious injuries are caused by large, fast-moving ships over or near continental shelves. [116] [117] A 60-foot-long fin whale was found stuck on the bow of a container ship in New York harbour on 12 April 2014 ...
It is the cetacean with the greatest appetite for human interaction and the most commonly used dolphin in dolphinariums. [31] Although the Bottlenose dolphin is the most abundant cetacean species in the Mediterranean, its population is in a slight decline. [32] It can be found along the coasts of the entire basin. [17]
The liver is large and separate from the gall bladder. [33] The kidneys are long and flattened. The salt concentration in cetacean blood is lower than that in seawater, requiring kidneys to excrete salt. This allows the animals to drink seawater. [34] The urinary bladder is proportionally smaller in cetaceans than in land mammals. [35]
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.
This page was last edited on 16 October 2015, at 22:46 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
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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.