TemperateReefBase Geonetwork Catalogue
Feeding of Antarctic Krill
Metadata record for data from ASAC Project 668
See the link below for public details on this project.
From the abstracts of some of the referenced papers:
Body shrinkage may be one of the strategies that Antarctic krill use to cope with food scarcity, particularly during winter. Despite their demonstrated ability to shrink, there are only very limited data to determine how commonly shrinkage occurs in the wild. It has been previously shown that laboratory-shrunk krill tend to conserve the shape of the eye. This study examined whether the relationship between the eye diameter and body length could be used to detect whether krill had been shrinking. By tracking individuals over time and examining specimens sampled as groups, it was demonstrated that fed and starved krill are distinguishable by the relationship between the eye diameter and body length. The eye diameter of well-fed krill continued to increase as overall length increased. This created a distinction between fed and starved krill, while no separation was detected in terms of the body length to weight relationship. Eye growth of krill re-commenced with re-growth of krill following shrinkage although there was some time lag. It would take approximately 2 moult cycles of shrinkage at modest rates to significantly change the eye diameter to body length relationship between normal and shrunk krill. If krill starve for a prolonged period in the wild, and hence shrink, the eye diameter to body length relationship should be able to indicate this. This would be particularly noticeable at the end of winter.
A series of experiments was carried out to examine the relationship between feeding, moulting, and fluoride content in Antarctic krill (Euphausia superba). Starvation increased the intermolt period in krill, but had no effect on the fluoride concentration of the moults produced. Addition of excess fluoride to the sea water had no direct effect on the intermoult period, the moult weight, or moult size. Additions of 6 micrograms per litre and 10 micrograms per litre fluoride raised the fluoride concentrations of the moults produced and the whole animals. The whole body fluoride content varied cyclically during the moult cycle, reaching a peak 6 days following ecdysis. Fluoride loss at ecdysis could largely be explained by the amount of this ion shed in the moult.
Simple
Identification info
- Alternate title
- Feeding of Antarctic Krill
- Date (Publication)
- 2000-08-03
- Edition
- 1
Originator
Publisher
Principal investigator
Collaborator
- Name
- CAASM Metadata
- Other citation details
- Restricted access
- Status
- Completed
Custodian
- Topic category
-
- Biota
- Oceans
Extent
))
Extent
- Description
- Temporal Coverage
Temporal extent
- TimePeriod
- 1990-09-01 1994-03-31
- Title
- Antarctic krill Euphausia superba acquire a UV-absorbing mycosporine-like amino acid from dietary algae
- Date (Publication)
- 2000
- Citation identifier
- 255
Author
- Name
- Journal of Experimental Marine Biology and Ecology
- Issue identification
- 1
- Page
- 93-110
- Title
- Molting, feeding, and fluoride concentration of the antarctic krill Euphausia superba Dana.
- Date (Publication)
- 1991
- Citation identifier
- 11
Author
- Name
- Journal of Crustacean Biology
- Issue identification
- 1
- Page
- 10-16
- Title
- Using the relationship between eye diameter and body length to detect the effects of long-term starvation on Antarctic krill Euphausia superba
- Date (Publication)
- 2002
- Citation identifier
- 239
Author
- Name
- Marine Ecology Progress Series
- Page
- 157-167
- Title
- Sex diatoms and Antarctic krill
- Date (Publication)
- 1999
Author
- Title
- Interpreting aspects of krill life history and survival through lipid analyses.
- Date (Publication)
- 1994
Author
- Name
- SCAR Sixth Antarctic Biology Symposium
- Page
- 282
- Other citation details
- 20 May - 3 June 1994, Venice
- Title
- The lipid composition of Euphausia superba Dana in relation to the nutritional value of Phaeocystis pouchetii (Hariot) Lagerheim.
- Date (Publication)
- 1993
- Citation identifier
- 5
Author
- Name
- Antarctic Science
- Issue identification
- 2
- Page
- 169-177
- Title
- Changes in the digestive gland of Euphausia superba during short-term starvation: lipid class, fatty acid and sterol content and composition.
- Date (Publication)
- 1993
- Citation identifier
- 117
Author
- Name
- Marine Biology
- Page
- 441-448
- NASA/GCMD Earth Science Keywords
-
- EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES
- EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ARTHROPODS > CRUSTACEANS
- EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ARTHROPODS > CRUSTACEANS > EUPHAUSIIDS (KRILL)
- NASA/GCMD Earth Science Keywords
-
- AMD/AU
- CEOS
- AMD
- NASA/GCMD Earth Science Keywords
-
- OCEAN > SOUTHERN OCEAN
- GEOGRAPHIC REGION > POLAR
Resource constraints
- Use limitation
- This metadata record is publicly available.
Resource constraints
- Access constraints
- licence
- Other constraints
- PDF copies of some of the papers are available for download from the provided URL to AAD staff only.
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_668 when using these data.
- Language
- English
- Character encoding
- UTF8
Distribution Information
Distributor
Distributor
Distributor
- Fees
- free
- Units of distribution
- kb
- Transfer size
- 6572
- Distribution format
-
- OnLine resource
-
PROJECT HOME PAGE
Public information for ASAC project 668
- OnLine resource
-
VIEW RELATED INFORMATION > PUBLICATIONS
Download point for the papers - AAD Staff Only
- OnLine resource
-
VIEW RELATED INFORMATION
Citation reference for this metadata record and dataset
Resource lineage
- Statement
- Dates provided in temporal coverage are approximate only.
- Hierarchy level
- Dataset
- Maintenance and update frequency
- As needed
- Maintenance note
- 2010-07-23 - record updated by Dave Connell to change URL Content Type. 2016-11-24 - record updated by Dave Connell - basic updates.
Metadata
- Metadata identifier
- string/ASAC_668
- Language
- English
- Character encoding
- UTF8
Author
Sponsor
Owner
Type of resource
- Resource scope
- Dataset
Alternative metadata reference
- Title
- gov.nasa.gsfc.gcmd
- Citation identifier
- a8f41550-8b7d-48da-87b6-ef45954d45dd
Alternative metadata reference
- Title
- gov.nasa.gsfc.gcmd
- Date (Last Revision)
- 2015-11-30T06:36:54
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_668
Point of truth for the metadata record
- Date info (Creation)
- 2000-08-03T00:00:00
- 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
