[Location: Location_Category='OCEAN', Location_Type='SOUTHERN OCEAN', Detailed_Location='Heard Island']
Biodiversity of lacustrine Antarctic crustaceans: local and regional genetic diversity of copepods and cladoceransEntry ID: ASAC_1200
Abstract: The aim of the study was to characterise the genetic biodiversity of populations of the copepod Paralabidocera antarctica and the cladoceran Daphniopsis studeri in the Australian Antarctic Territory. Sampling was finalised during November and December 2000.
Daphniopsis studeri were sampled from freshwater lakes in the Vestfold and Larsemann Hills, and from small ponds on Heard Island. ... Paralabidocera antarctica were collected from saline lakes, fjords and embayments around the Vestfold Hills.
Each population was analysed at 16 allozyme loci using cellulose acetate electrophoresis. Allozyme data were recorded as multilocus genotypes for each individual. The observed number of multi-locus genotypes were tested against expected values to determine whether populations of Daphniopsis studeri reproduce by obligate or cyclic parthenogenesis. Geographic genetic structure of the crustacean populations was assessed using genetic distance measures and cluster analysis. Local and regional gene flow was estimated using Fst and multivariate statistics.
By using genetic tools to measure indirectly dispersal and gene flow among populations with each species, we hope to reconstruct the history of these species in Antarctica and to determine the relative significance of historical versus contemporary ecological conditions.
Start Date: 1994-06-01Stop Date: 2000-12-31
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ARTHROPODS > CRUSTACEANS
BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > SPECIES LIFE HISTORY
BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > POPULATION DYNAMICS
BIOSPHERE > ECOLOGICAL DYNAMICS > COMMUNITY DYNAMICS > SPECIES RECRUITMENT
Access Constraints Data for this project have unfortunately been lost. All that is now available is a copy of a publication, which is available for download by AAD staff only.
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Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_1200 when using these data.
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Distribution Media: HTTP
Distribution Size: 182 kb
Distribution Format: pdf
Role: TECHNICAL CONTACT
Role: DIF AUTHOR
Phone: +61 3 6226 2522
Fax: +61 3 6226 2745
Email: k.swadling at utas.edu.au
School of Zoology University of Tasmania GPO BOX 252-05
Province or State: Tasmania
Postal Code: 7001
Wilson, C., Swadling, K. and Gibson, J. (2002), Understanding the origins of Antarctic freshwater crustaceans., Newsletter for the Canadian Antarctic Research Network, 14, 4-5
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Creation and Review Dates
DIF Creation Date: 2000-08-10
Last DIF Revision Date: 2014-01-10