NOTICE Notice: This is an old thread. The last post was 1997 days ago. If your post is not directly related to this discussion please consider making a new thread.
Results 1 to 2 of 2

Thread: Evolution and development of cetacean appendages

  1. #1
    sarlo518's Avatar
    Silver Member


    Status
    Offline
    Join Date
    Feb 2010
    Work
    Pre-Veterinary
    Country
    Malta
    Gender
    Male
    Total Posts
    274
    Rep Power
    2001
    Total thanks received
    14,126
    Thanks for this post
    24
    Pre-Veterinary I'm from Malta

    Post Evolution and development of cetacean appendages

    EVOLUTION AND DEVELOPMENT OF CETACEAN APPENDAGES

    Download File
    Hidden contents (Our Amazon affiliate links)
    You must click 'Thank You' before you can see the data contained here. You can purchase this item from Amazon with discount through our amazon affiliate link.
    BUT You DONOT have sufficient rights to see the hidden data contained here.
    Please Register to see contents.
    Hidden contents (Our Amazon affiliate links)
    You must click 'Thank You' before you can see the data contained here. You can purchase this item from Amazon with discount through our amazon affiliate link.
    BUT You DONOT have sufficient rights to see the hidden data contained here.
    Please Register to see contents.
    INTRODUCTION Over the past decade, the origin of cetaceans (whales, dolphins, and porpoises) has become an excellent case study in mammalian evolution (Thewissen and Bajpai, 2001, Uhen 2007, Thewissen et al., 2009). A rich collection of fossil cetaceans, mostly from Asia, Africa and North America, provides an ancient record of the cetacean transition from a terrestrial to a completely aquatic environment (e.g., Gingerich et al., 1994, 2001; Thewissen et al., 1994, 2001a,b; Hulbert, 1998; Hulbert et al., 1998; Bajpai and Thewissen 2000; Geisler, 2001; Uhen, 2004, 2007; Thewissen et al., 2009). Cetaceans initially took to the seas about 50 million years ago in an ancient shallow seaway, the Tethys Sea, that laid between the Indian subcontinent and Asia (e.g. Thewissen and Bajpai, 2001). Within about 10 million years in the aquatic environment, cetaceans evolved specialized ears for hearing underwater, reduced the size of the hindlimbs, and developed tail flukes for propulsion. The cetacean body plan had so radically evolved from terrestrial artiodactyls (even-toed hoofed mammals) that modern cetaceans are no longer able to bear their weight on land and are obligatorily aquatic (Thewissen and Fish, 1997; Buccholtz, 1998; Bajpai and Thewissen, 2000; Madar et al., 2002; Gingerich et al., 2001; Gingerich, 2003).
    Reply With Quote Reply With Quote
    Thanks

  2. #2
    dolfy31's Avatar
    New Member

    Status
    Offline
    Join Date
    Jun 2012
    Work
    Mixed Animals Practice
    Country
    France
    Gender
    Male
    Total Posts
    1
    Rep Power
    0
    Total thanks received
    1
    Thanks for this post
    1
    Mixed Animals Practice I'm from France

    Default Re: Evolution and development of cetacean appendages

    Dead link
    Could u reupload please ?
    Many thanks
    Reply With Quote Reply With Quote
    Thanks

  3. Who Said Thanks:


Similar Threads

  1. The Development of Animal Form: Ontogeny, Morphology, and Evolution
    By sarlo518 in forum General Veterinary eBooks
    Replies: 2
    Last Post: 11th July 2012, 08:26 PM
  2. [Anatomy] Muscles of Vertebrates: Comparative Anatomy, Evolution, Homologies and Development
    By Animal in forum Basic Veterinary eBooks
    Replies: 1
    Last Post: 12th June 2012, 10:44 AM
  3. Animal Behavior. Mechanism, Development, Function and Evolution
    By LABRyeah in forum General Veterinary eBooks
    Replies: 2
    Last Post: 10th May 2012, 03:20 PM
  4. Cetacean Palaeobiology
    By sarlo518 in forum Useful Websites & Online Resources
    Replies: 0
    Last Post: 18th March 2010, 04:47 PM
  5. Cetacean Biology
    By sarlo518 in forum Useful Websites & Online Resources
    Replies: 0
    Last Post: 18th March 2010, 04:42 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •