TemperateReefBase Geonetwork Catalogue
Food consumption and energy expenditure of free ranging southern elephant seals
Elephant seals use a suite of physiological and behavioural mechanisms to maximise the time they can be submerged. Of these hypo-metabolism is one of the most important, so this study quantified maximum O2 consumptions relative to dove depth and swim speed.
From the abstract of the referenced paper:
Heart rate, swimming speed, and diving behaviour were recorded simultaneously for an adult female southern elephant seal during her postbreeding period at sea with a Wildlife Computers heart-rate time depth recorder and a velocity time depth recorder. The errors associated with data storage versus real-time data collection of these data were analysed and indicated that for events of short duration (i.e., less than 10 min or 20 sampling intervals) serious biases occur. A simple model for estimating oxygen consumption based on the estimated oxygen stores of the seal and the assumption that most, if not all, dives were aerobic produced a mean diving metabolic rate of 3.64 mL O2 kg-1, which is only 47% of the field metabolic rate estimated from allometric models. Mechanisms for reducing oxygen consumption while diving include cardiac adjustments, indicated by reductions in heart rate on all dives, and the maintenance of swimming speed at near the minimum cost of transport for most of the submerged time. Heart rate during diving was below the resting heart rate while ashore in all dives, and there was a negative relationship between the duration of a dive and the mean heart rate during that dive for dives longer than 13 min. Mean heart rates declined from 40 beats min-1 for dives of 13 min to 14 beats min-1 for dives of 37 min. Mean swimming speed per dive was 2.1 m s-1, but this also varied with dive duration. There were slight but significant increases in mean swimming speeds with increasing dive depth and duration. Both ascent and descent speeds were also higher on longer dives.
Data were collected on Time Depth Recorders (TDRs), and stored in hexadecimal format. Hexadecimal files can be read using 'Instrument Helper', a free download from Wildlife Computers (see the provided URL).
Data for this project is the same data that was collected for ASAC projects 769 and 589 (ASAC_769 and ASAC_589).
Simple
Identification info
- Alternate title
- Food consumption and energy expenditure of free ranging southern elephant seals
- Date (Publication)
- 2004-10-20
- Edition
- 1
- Citation identifier
-
Dataset DOI
- Title
- Information and documentation - Digital object identifier system
- Date (Publication)
- 2012-04-23
- Citation identifier
- ISO 26324:2012
- Citation identifier
- doi:10.4225/15/5848d3787665d
Originator
Publisher
Principal investigator
Collaborator
- Name
- CAASM Metadata
- Status
- Completed
Custodian
- Topic category
-
- Biota
- Oceans
Extent
))
Extent
- Description
- Temporal Coverage
Temporal extent
- TimePeriod
- 1996-09-01 1997-06-30
- Title
- Heart rate, swimming speed and estimated oxygen consumption of a free ranging female elephant seal.
- Date (Publication)
- 1998
- Citation identifier
- 71
Author
- Name
- Physiological Zoology
- Page
- 74-84
- Title
- Metabolic limits on dive duration and swimming speed in the southern elephant seal Mirounga leonina.
- Date (Publication)
- 2000
- Citation identifier
- 73
Author
- Name
- Physiological and Biochemical Zoology
- Issue identification
- 6
- Page
- 790-798
- NASA/GCMD Earth Science Keywords
-
- EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > MAMMALS > CARNIVORES > SEALS/SEA LIONS/WALRUSES
- EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > MAMMALS
- EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > CONSUMPTION RATES
- Keywords
-
- ENERGETICS
- FORAGING
- MACQUARIE ISLAND
- SEALS
- SOUTHERN ELEPHANT SEALS
- SOUTHERN OCEAN
- TELEMETRY
- NASA/GCMD Earth Science Keywords
-
- AMD/AU
- CEOS
- AMD
- NASA/GCMD Earth Science Keywords
-
- OCEAN > SOUTHERN OCEAN
- OCEAN > SOUTHERN OCEAN > MACQUARIE ISLAND
- GEOGRAPHIC REGION > POLAR
Resource constraints
- Use limitation
- This metadata record is publicly available.
Resource constraints
- Access constraints
- licence
- Other constraints
- The data are publicly available for download from the provided URL. The publications are only available to AAD staff.
Resource constraints
- File type
- Portable Network Graphic
- Title
- Attribution 4.0 International (CC BY 4.0)
- Website
-
https://creativecommons.org/licenses/by/4.0/legalcode
Legal code for Creative Commons by Attribution 4.0 International license
- Use constraints
- licence
- Other constraints
- This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_857 when using these data. Please also contact the investigator when using these data.
- Language
- English
- Character encoding
- UTF8
Distribution Information
Distributor
Distributor
Distributor
- Fees
- free
- Planned available datetime
- 2004-10-20T00:00:00
Distributor
- Fees
- Free
- Planned available datetime
- 2004-10-20T00:00:00
- Units of distribution
- MB
- Transfer size
- 9.2
- Distribution format
-
- hexadecimal
- Units of distribution
- kb
- Transfer size
- 345
- Distribution format
-
- OnLine resource
-
DOWNLOAD SOFTWARE
Download Point for Instrument Helper
- OnLine resource
-
GET DATA
Download point for the data
- OnLine resource
-
PROJECT HOME PAGE
Public information for ASAC project 857
- OnLine resource
-
VIEW RELATED INFORMATION > PUBLICATIONS
Download point for the publications - AAD Only
- OnLine resource
-
VIEW RELATED INFORMATION
Citation reference for this metadata record and dataset
- Maintenance and update frequency
- As needed
- Maintenance note
- 2010-12-21 - record updated by Dave Connell to update the use constraints. 2014-01-08 - record updated by Dave Connell to link some publications. 2016-12-08 - record updated by Dave Connell - basic updates.
Metadata
- Metadata identifier
- string/ASAC_857
- Language
- English
- Character encoding
- UTF8
Author
Sponsor
Owner
Type of resource
- Resource scope
- Dataset
Alternative metadata reference
- Title
- gov.nasa.gsfc.gcmd
- Citation identifier
- abecbee9-0e12-4d4c-a210-94aba40a8147
Alternative metadata reference
- Title
- gov.nasa.gsfc.gcmd
- Date (Last Revision)
- 2015-11-30T06:38:13
Identifier
- Description
- metadata.extraction_date
Alternative metadata reference
- Title
- gov.nasa.gsfc.gcmd
- Citation identifier
- 8.6
- Metadata linkage
-
http://data.aad.gov.au/metadata/records/ASAC_857
Point of truth for the metadata record
- Date info (Creation)
- 2000-08-08T00:00:00
- Date info (Last Update)
- 2017-04-26
Metadata standard
- Title
- ISO 19115-3
- Edition
- 2014
- Other citation details
- Version 1
- Title
- DIF to ISO 19115-1 Profile
Overviews
Spatial extent
Provided by
