[Location: Location_Category='CONTINENT', Location_Type='ANTARCTICA', Detailed_Location='Terra Nova Bay']
The distribution, taxonomy, physiology and feeding habits of pelagic amphipods in Terra Nova BayEntry ID: K043_2006_2008_NZ_5
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.
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Start Date: 2006-11-03Stop Date: 2006-12-09
Start Date: 2007-11-10Stop Date: 2007-12-10
Quality 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.
Data Set Progress
Phone: +64 4 463 6083
Fax: +64 4 463 5331
Email: ken.ryan at vuw.ac.nz
Victoria University of Wellington School of Biological Sciences PO BOX 600
Postal Code: 6140
Country: New Zealand
Role: DIF AUTHOR
Phone: +64 3 358 0200
Fax: +64 3 358 0211
Email: s.gordon at antarcticanz.govt.nz
Antarctica New Zealand Private Bag 4745
Country: New Zealand
Bryant, L. Maas, E., Davy S., Koh, EY, Rajanahally, M, Martin A, Ryan KG (2008). Biodiversity and diet of pelagic amphipods of the Ross Sea. Antarctic New Zealand Annual Conference, Dunedin July 2008.
Bryant, L. Amphipod diversity and taxonomy in the Ross Sea. MSc thesis in progress, Victoria University of Wellington, New Zealand.
Creation and Review Dates
DIF Creation Date: 2005-09-22
Last DIF Revision Date: 2009-03-16