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Videos search results: "whales"
 
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Title          
Circular bubbles produced by Whales and Dolph... 
   
 
Abstract    
Circular bubbles produced by Whales and Dolphins. A bubble ring is an underwater ring vortex where an air bubble occupies the core of the vortex, forming a ring shape. The ring of air as well as the nearby water spins poloidally as it travels through the water, much like a flexible bracelet might spin when it is rolled off a person's arm. Some scuba divers can create bubble rings by blowing air out of their mouth in a particular manner. Long bubble rings also can form spontaneously in turbulent water such as in heavy surf. Bubble rings and smoke rings are both forms of vortex rings, and are sometimes studied in the field of fluid dynamics. Dolphins and humpback whales have also been seen to create bubble rings. Dolphins sometimes create bubble rings on purpose, seemingly for amusement.
 
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Added By - justin
Subject - Bioengineering
Document Type - Demonstration
Video Duration - 00:01:07
 
 
 

 

Title          
Whales originated from aquatic artiodactyls i... 
   
 
Abstract    

In this video, Hans Thewissen and Lisa Cooper from the Northeastern Ohio Universities College of Medicine discuss their paper entitled "Whales originated from aquatic artiodactyls in the Eocene epoch of India", published in the Nature (Vol 450 Issue 7173 20 December 2007). Their co-authors include Mark Clementz, Sunil Bajpai and B.N.Tiwari.

Although the first ten million years of whale evolution are documented by a remarkable series of fossil skeletons, the link to the ancestor of cetaceans has been missing. It was known that whales are related to even-toed ungulates (artiodactyls), but until now no artiodactyls were mo...

 
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Added By - autocrawler
Subject - Biology
Document Type - Journal Paper Discussion
Video Duration - moderate
 
 
 

 

Title          
CritterCam - Penguins on the Roll 
   
 
Abstract    

The following information has been copied from the National Geographic website. "National Geographic's Crittercam is a research tool designed to be worn by wild animals. It combines video and audio recording with collection of environmental data such as depth, temperature, and accelerationThese compact systems allow scientists to study animal behavior without interference by a human observer. Combining solid data with gripping imagery, Crittercam brings the animal's point of view to the scientific community and a conservation message to worldwide television audiences. For more than a decade Crittercam has given us insight into the lives of whales, sharks, seals and sea lions, sea turtles, penguins, manatees, and other marine animals. In 2002 the first prototype of a terrestrial Crittercam (designed for land animals) survived its maiden voyage on a wild African lion, opening the door to a whole new world of animal-borne imaging research. The video was recorded during a presentation of Corey Jaskolski (National Geographics) with consent.

 
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Added By - A Ghosh
Subject - Biology
Document Type - Documentary
Video Duration - 00:01:57
 
 
 

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