Abstract:
The distribution, taxonomy, physiology and feeding habits of pelagic amphipods was investigated. Amphipods were collected by plankton tow, baited traps, coring (coring through sea ice) or hand collections (from tide cracks). Approximately 2000 individual amphipods were collected. About 75% of the amphipods collected were preserved in vials of absolute ethanol for DNA studies. The remaining 25% were split evenly between 4-5% EM grade gluteraldehyde, 5-6% formalin, and frozen dried for SEM, gut content analysis and isotope analysis respectively.
They will be examined for 1) an investigation of the diet of pelagic amphipods by means of visual microscopic gut content analysis, together with stable isotope analysis of carbon and nitrogen isotopic composition of the amphipod, 2) sequencing of the cytochrome c oxidase I (COXI) gene of each morphologically identified species and 3) a comparison of species composition and their respective diets between pelagic amphipods from Terra Nova Bay, an area covered by sea ice and those found in the open water of the Ross Sea.
The rate of movement of amphipods was determined by experimentally exposing amphipods to increasing water temperature and measuring the distance traveled over 30 seconds at each temperature. The distribution of amphipods under the ice was determined by lowering a plankton net to a depth of 5m below the sea ice, withdrawing it, emptying it and counting the amphipods, 3 times at 4 hour intervals over 24 hours.
Existing samples are held at Victoria University of Wellington with a spreadsheet of sample numbers. All raw data is held by the investigators. Please contact Dr Ken Ryan for more information.
Name:
SHULAMIT
GORDON Phone:
+64 3 358 0200
Fax:
+64 3 358 0211
Email:
s.gordon at antarcticanz.govt.nz
Contact Address:
Antarctica New Zealand
Private Bag 4745 City:
Christchurch
Country:
New Zealand
Personnel
KEN
RYAN Role:
INVESTIGATOR
Phone:
+64 4 463 6083
Fax:
+64 4 463 5331
Email:
ken.ryan at vuw.ac.nz
Contact Address:
Victoria University of Wellington
School of Biological Sciences
PO BOX 600 City:
Wellington
Postal Code:
6140
Country:
New Zealand
SHULAMIT
GORDON Role:
DIF AUTHOR
Phone:
+64 3 358 0200
Fax:
+64 3 358 0211
Email:
s.gordon at antarcticanz.govt.nz
Contact Address:
Antarctica New Zealand
Private Bag 4745 City:
Christchurch
Country:
New Zealand
Publications/References
Selkirk P.M., Adamson D.A., Seppelt R.D. (1988) Terrace types and vegetation dynamics on Macquarie Island. Papers and Proceedings of the Royal Society of Tasmania 122(1). 59-64
Adamson D.A., Selkirk P.M., Colhuon E.A. (1988) Landforms of aeolian, tectonic and marine origin in the Bauer Bay - Sandy Bay region of subantarctic Macquarie Island. Papers and Proceedings of the Royal Society of Tasmania 122(1). 65-82
Selkirk D.R., Selkirk P.M., Bergstrom D.M., Adamson D.A. (1988) Ridge top peats and palaeolake deposits on Macquarie Island. Papers and Proceedings of the Royal Society of Tasmania 122(1). 83-90
Bergstrom D.M. (1986) An atlas of seeds and fruits from Macquarie Island. Proceedings of the Linnean Society of New South Wales 109(2). 69-90
Adamson D.A., Whetton P., Selkirk P.M. (1988) Warming on Macquarie Island: temperature changes reflecting Southern Hemisphere circulation and the southern oscillation. Papers and Proceedings of the Royal Society of Tasmania 122. 107
Colhoun E., Selkirk P., Adamson D. (1987) Observations on the landscape and history of the Bauer Bay - Sandy Bay region, Macquarie Island. Papers and Proceedings of the Royal Society of Tasmania, May.
Selkirk P., Adamson D., Wilson M. (1990) Raised marine terrace on northwest coast of Macquarie Island Proceedings of the Linnean Society of New South Wales 112. 141
Bergstrom D.M. (1986) Evidence from fossils for uplift during the Holocene in Green Gorge, Macquarie Island/ Colloque sur les Ecosystemes Terrestres Subantarctiques 1986 Paimont 58. 73-82
Selkirk, P., McBridge, P., Keenan, H., Adamson, D. (1991) Palaeolake deposits and cliff retreat on subantarctic Macquarie Island. Quaternary Research in Aust. Ant.: Future Directions 3. 45;
Creation and Review Dates
DIF Creation Date:
2005-09-22
Last DIF Revision Date:
2009-03-16
