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Order Cetacea Dolphins, Porpoises and Whales

Order Cetacea Dolphins, Porpoises and Whales. Amanda Rosenberger. Order Cetacea. Cetus – Latin Meaning ‘whale’ (modern use) Meaning ‘large sea animal’ (original usage) Ocean dwelling mammals Lungs to breath Warm-blooded Hair, may be abundant to scarce, some microscopic Live young.

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Order Cetacea Dolphins, Porpoises and Whales

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  1. Order CetaceaDolphins, Porpoises and Whales Amanda Rosenberger

  2. Order Cetacea • Cetus – Latin • Meaning ‘whale’ (modern use) • Meaning ‘large sea animal’ (original usage) • Ocean dwelling mammals • Lungs to breath • Warm-blooded • Hair, may be abundant to scarce, some microscopic • Live young

  3. Characteristics • Fusiform – spindled-shaped • Front forearms are flippers • Hind legs are tiny or non-existent (vestigial) • Horizontal tail – flukes • Swim by moving body up and down vs. fish which swim side to side

  4. Classification • Kingdom - Animalia • Phylum - Chordata • Class - Mammalia • Order - Cetacea • Suborder (s) • Mysticeti • Odontoceti

  5. Evolution • Modern whales and their first cousin, the hippopotamus • New research suggests that Cetaceans belong to the even-toed ungulates, Order - Artiodactyla http://www.sciencedaily.com/releases/2005/02/050205103109.htm

  6. Suborder - Mysticeti • Baleen whales • Filter feeders • Baleen plates • 15 species • Largest is the Blue Whale • V-shaped blowhole • Slower swimmers • Hunted for oil and baleen

  7. Suborder - Odontoceti • Toothed whales, dolphins and porpoises • 73 species • Use echolocation, fast swimmers • Have no vocal cords • Blowhole is used for vocalizations • Human impact on species is greatest. • Zoos – Bottlenosed Dolphins, Orcas and Belugas • Military use, fisheries competition, tourism, ship strikes, movies

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