Buoyancy Regulation and the Energetics of Diving in Dolphins Seals, Sea Lions and Sea Otters.

We examined swim speed and ascent descent rates in sea lions and elephant seals in order to make comparisons in their diving strategies and how these may be effected by different strategies of buoyancy regulation. We experimentally examined the relationship between buoyancy and diving behavior in Ju...

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Bibliographic Details
Main Author: Costa, Daniel P.
Other Authors: CALIFORNIA UNIV SANTA CRUZ
Format: Text
Language:English
Published: 1998
Subjects:
Biology
Acoustics
*HYDROSTATICS
*AQUATIC ANIMALS
*BIOACOUSTICS
*SEALS(MAMMALS)
*ACOUSTIC RECORDING SYSTEMS
VELOCITY
STRATEGY
BEHAVIOR
ENERGETIC PROPERTIES
HYDRODYNAMICS
DIVING
BUOYANCY
SWIMMING
BEHAVIORAL SCIENCES
DESCENT
CETACEA
ASCENT TRAJECTORIES
DRS LIOND
DRS OYYRTD
Elephant Seals
Online Access:http://www.dtic.mil/docs/citations/ADA365292
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA365292
Description
Summary:We examined swim speed and ascent descent rates in sea lions and elephant seals in order to make comparisons in their diving strategies and how these may be effected by different strategies of buoyancy regulation. We experimentally examined the relationship between buoyancy and diving behavior in Juvenile northern elephant seals. This study demonstrated that buoyancy plays a significant role in shaping the diving behavior of seals and sea lions. We found that marine mammals either use either hydrostatic or hydrodynamic buoyancy regulation depending upon their swimming speed and diving strategy. True seals rely more on hydrostatic buoyancy regulation, while sea lions, fur seals and cetaceans rely more on hydrodynamic buoyancy regulation.

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