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Portal:Cetaceans

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A Sperm Whale fluke
The order Cetacea includes the whales, dolphins and porpoises and comprise the mammals most fully adapted to aquatic life. It contains 81 known species organized in two suborders: Mysticeti (baleen whales) and Odontoceti (toothed whales, which includes dolphins and porpoises). The order contains several record breaking species, with the Blue Whale being the largest animal known, and the Orca being the most widely distributed animal.

Cetaceans evolved from land mammals that adapted to marine life about 50 million years ago. Over a period of a few millions of years during the Eocene, the cetaceans returned to the sea. Their body is fusiform (spindle-shaped), the forelimbs are modified into flippers, the tiny hindlimbs are vestigial and the tail has horizontal flukes. Cetaceans are nearly hairless, and are insulated by a thick layer of blubber.

Cetaceans inhabit all of the world's oceans, as well as some rivers in South America and Asia. Some species can be found across the globe.

Cetology is the branch of marine science associated with the study of cetaceans.

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The crew of the oceanographic research vessel "Princesse Alice," of Albert Grimaldi (later Prince Albert I of Monaco) pose while flensing a catch.

Whaling is the harvesting of free-roaming whales from the oceans and dates back to at least 6,000 BC. Whaling and other threats have led to at least 5 of the 13 great whales being listed as endangered. Commercial whaling is subject to a moratorium by the International Whaling Commission (IWC), however, at the 2006 IWC meeting, the St Kitts and Nevis Declaration, which protests the moratorium, was adopted by a slim majority.

It is unknown when humans began hunting whales. The earliest archaeological record of whaling is found in South Korea where carved drawings, dating back to 6,000 BC, show that Stone Age people hunted whales using boats and spears. However, over time, whaling techniques have grown more technologically sophisticated. Initially, whaling was confined to (near) coastal waters, such as the Basque fishery targeting the North Atlantic Right Whale from the 11th to 18th century and the Atlantic Arctic fishery around and in between Spitsbergen and Greenland from the 17th to the 20th century. However, after the emergence of modern whaling techniques, certain species of whale started to be seriously affected by whaling. These techniques were spurred in the 19th century by the increase in demand for whale oil, and later in the 20th century by a demand for whale meat.

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2014

January

The clymene dolphin (Stenella clymene) became the first confirmed naturally occurring hybrid marine mammal species when DNA analysis showed it to be descended from the spinner dolphin and the striped dolphin. [1]

2009

February

  • 10 February - Filipino fishermen have rescued around 200 melon-headed whales which were stranded in shallow waters off the coast of Bataan. Only three dolphins were reported to have died. more

January

2008

September

August

  • 26 August - Findings from the controversial Japanese whaling research program suggest that a loss of Antarctic sea ice due to increased temperatures has lowered whales' food supply, causing an overall decline in blubber. Read more...
  • 12 August - IUCN changes the conservation status of the Humpback Whale and Southern Right Whale to "least concern" due to the species' recovery. Read more...
  • 1 August - Snubfin Dolphins are recorded on camera for the first time along the Australian coastline. Read more...
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  • ...Qi Qi was the name of one of several captive Baijis held at the Wuhan Institute in China in an attempt to rescue the species.
  • ...the Beaked whales (genus Ziphidae) contain over twenty species of small whales, and are the least known of all cetaceans.
  • ...The ear bone called the hammer (malleus) in cetaceans is fused to the walls of the bone cavity where the ear bones are, making hearing in air nearly impossible. Instead sound is transmitted through their jaws and skull bones.
  • ...cetaceans with pointed beaks have good binocular vision, but others, such as the Sperm Whale cannot see directly in front or behind.
  • ...Migaloo is an albino Humpback Whale often spotted off the east coast of Australia.
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Dolphins at Loro Parque, Tenerife.
Photo credit: Piotrus

A dolphinarium is an aquarium for dolphins. The dolphins are usually kept in a large pool, though occasionally they may be kept in pens in the open sea, either for research or for public performances. Some dolphinariums consist of one pool where dolphins perform for the public (such as above at Loro Parque), others have expanded into much larger parks, keeping other marine animals and having other attractions.

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The content you are reading was created by Wikipedia volunteers. See the WikiProject Cetaceans for more.

Related WikiProjects include:

See also Wikispecies, a Wikimedia project dedicated to the classification of species.

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Whale species

Andrews' Beaked WhaleBalaenoptera omuraiBelugaBlainville's Beaked WhaleBlue Whale Cscr-featured.svgBottlenose WhaleBowhead WhaleBryde's WhaleCuvier's Beaked WhaleDwarf Sperm WhaleFin Whale Cscr-featured.svgGervais' Beaked WhaleGiant beaked whaleGinkgo-toothed Beaked WhaleGray WhaleGray's Beaked WhaleHector's Beaked WhaleHubbs' Beaked WhaleHumpback Whale Cscr-featured.svgLayard's Beaked WhaleLongman's Beaked WhaleMelon-headed WhaleMinke WhaleNarwhalPerrin's Beaked WhalePygmy Beaked WhalePygmy Killer WhalePygmy Right WhalePygmy Sperm WhaleRight Whale Cscr-featured.svgSei Whale Cscr-featured.svgShepherd's Beaked WhaleSowerby's Beaked WhaleSpade Toothed WhaleSperm Whale Symbol support vote.svgStejneger's Beaked WhaleTrue's Beaked Whale

Dolphin species

Atlantic Spotted DolphinAtlantic White-sided DolphinAustralian Snubfin DolphinBaijiBotoChilean DolphinClymene DolphinCommerson's DolphinCommon Bottlenose DolphinDusky Dolphin Symbol support vote.svgFalse Killer WhaleFraser's DolphinGanges and Indus River DolphinHeaviside's DolphinHector's DolphinHourglass DolphinHumpback dolphinIndo-Pacific Bottlenose DolphinIrrawaddy DolphinKiller Whale Cscr-featured.svgLa Plata DolphinLong-beaked Common DolphinLong-finned pilot whalePacific White-sided DolphinPantropical Spotted DolphinPeale's DolphinPygmy Killer WhaleRight whale dolphinRisso's DolphinRough-toothed DolphinShort-beaked Common DolphinShort-finned pilot whaleSpinner DolphinStriped DolphinTucuxiWhite-beaked Dolphin

Porpoise species

Burmeister's PorpoiseDall's PorpoiseFinless PorpoiseHarbour PorpoiseSpectacled PorpoiseVaquita

Other articles

Aboriginal whalingAmbergrisAnimal echolocationArchaeocetiBaleenBaleen whaleBeached whaleBeaked WhaleBlowhole (biology)BlubberBottlenose dolphin Symbol support vote.svgCallosityCephalorhynchusCetaceaCetacean intelligenceCetologyCetology of Moby-DickCommon dolphinCumberland Sound BelugaDolphinDolphinarium Symbol support vote.svgDolphin drive hunting Symbol support vote.svgEvolution of cetaceansExploding whaleHarpoonHistory of whalingHuman–animal communicationInstitute of Cetacean ResearchInternational Whaling CommissionLagenorhynchusMelon (whale)Mesoplodont WhaleMilitary dolphinMoby-DickMocha DickMonodontidaeOceanic dolphinOrcaellaPilot Whale Symbol support vote.svgPorpoiseRiver dolphinRiver Thames WhaleRorqualsSperm whale familySperm whalingSpermacetiStenellaTay WhaleThe Marine Mammal CenterToothed WhaleU.S. Navy Marine Mammal ProgramWhale Symbol support vote.svgWhalingWhale and Dolphin Conservation SocietyWhale surfacing behaviourWhale oilWhale louseWhale songWhale watchingWolphin

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Cetacea on Wikinews     Cetacea on Wikiquote     Cetacea on Wikibooks     Cetacea on Wikisource     Cetacea on Wikicommons Cetacea on Wiktionary
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  1. ^ http://news.nationalgeographic.com/news/2014/01/140111-hybrid-dolphin-species-ocean-animal-science/
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