Bottom topography - assessed by swath bathymetry - of the Southern Ocean collected aboard the James Clark Ross (JR145) during the 2005-2006 field season. Bathymetry data was collected to assess its influence on dispersal and gene flow in two Antarctic fishes (Champsocephalus gunnari and Notothenia rossii). Data was collected in the Southern Ocean from Elephant Island, Deception Island, the South Orkney Islands, King George (Potter Cove) and Signy (Borge Bay).
Fish samples of Champsocephalus gunnari and Notothenia rossii (tissues preserved in ethanol, and otoliths) were collected aboard the James Clark Ross (JR145) during the 2005-2006 field season. Morphometric data, including body length, mass, sex and reproductive condition, were derived from the samples. Between 60-100 adult individuals of each species were collected from each of several locations including: Elephant Island, Deception Island and the South Orkney Islands. Sampling from these regions allows us to test the influence of local hydrology/currents around the Antarctic Peninsula as well as that of larger systems within the Scotia Sea (via comparisons with samples already collected from Shag Rocks and South Georgia).