...Kelsey A. Tennett; Daniel P. Costa; Anthony J. Nicastro; Frank E. Fish ABSTRACT The aquatic specializations of phocid seals have restricted their ability to locomote on land. The amphibious northern elephant seal, Mirounga angustirostris , is the second largest phocid seal in the world, with males...

...Melinda Fowler; Cory Champagne; Daniel Crocker; Raul K. Suarez; Hans H. Hoppeler ABSTRACT Animals that fast depend on mobilizing lipid stores to power metabolism. Northern elephant seals ( Mirounga angustirostris ) incorporate extended fasting into several life-history stages: development, molting...

... The Company of Biologists Limited 2006 2006 fasting physiology Mirounga angustirostris Pinnipedia respiratory evaporative water loss water conservation For those vertebrates that have secondarily returned from a terrestrial existence to the marine environment, one of the primary challenges...

... Imaging and phase contrast flow analysis to obtain accurate flow measurements from the base of the aorta. Heart rate ( f h )and cardiac output ( Q̇ ) were measured before, during and after dives in four restrained juvenile northern elephant seals, Mirounga angustirostris , and stroke volume( V s...

...Rudy M. Ortiz; Charles E. Wade; C. Leo Ortiz; Frank Talamantes SUMMARY The physiological actions of vasopressin (VP) in marine mammals are not well defined. To help elucidate its hormonal and renal effects in this group of mammals, northern elephant seal ( Mirounga angustirostris ) pups( N =7; 99±4...

... dives in free-ranging northern elephant seals Mirounga angustirostris . We recorded f B and f H acoustically in six translocated juveniles, 1.8–2.4 years old, and three migrating adult males from the rookery at Año Nuevo, California, USA. To each seal, we attached a diving instrument to record...

... in buoyancy and diving behavior in northern elephant seals Mirounga angustirostris . This was achieved by modifying the buoyancy of 13 juvenile elephant seals translocated from Año Nuevo State Reserve, CA, USA, and released at various sites in Monterey Bay, CA, USA. The buoyancy of each seal was calculated...

...The Company of Biologists Limited 1997 diving apnoea heart rate bradycardia elephant seal Mirounga angustirostris data logger translocation The breath-holding ability of elephant seals (genus Mirounga ) appears to be unequalled in the class Mammalia. While at sea during...