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  1. Case Studies in Ecology and Evolution DRAFT D. Stratton 2011 1 1 Phylogenetic History: The Evolution of Marine Mammals Think for a moment about marine mammals: seals, walruses, dugongs and whales. Seals and walruses are primarily cold-water species that eat mostly fish and can spend part of their time on land (or ice).

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  2. May 21, 2007 · Also, the two recently evolved marine mammals, the polar bear and sea otter, spend most of their time in the water feeding. This is no great surprise, because a great deal of mammalian evolution has been linked to changes in feeding ecology.

    • Mark D. Uhen
    • 150
    • 2007
  3. Terrie Williams, Professor of Ecology & Evolutionary Biology, UC Santa Cruz, and Director of the Marine Mammal Physiology Project, Long Marine Lab It has taken 50 million years for cetaceans and pinnipeds to evolve into the largest, most efficient predators in the oceans.

  4. Evolution of Marine Mammals: Back to the Sea After 300 Million Years MARK D. UHEN* Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, DC ABSTRACT The fossil record demonstrates that mammals re-entered the marine realm on at least seven separate occasions. Five of these clades are still

    • Mark D. Uhen
    • 150
    • 2007
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  6. Feb 01, 2019 · Marine mammals are found in marine ecosystems around the globe. They are a diverse group of mammals with unique physical adaptations that allow them to thrive in the marine environment with extreme temperatures, depths, pressure, and darkness. Marine mammals are classified into four different taxonomic groups: cetaceans (whales, dolphins, and porpoises), pinnipeds (seals, sea lions, and ...

  7. Evolution of marine mammals. Three mammal groups are water-dwelling animals: the cetaceans ( whales, dolphins and porpoises ), the sirenians ( manatees and dugongs) and the pinnipeds ( seals, sea lions and walruses ). Quite independently, animals from each of these groups evolved bodies designed for survival in the water.

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