Sea Eagles on drift ice Rausu(Rausu’s Drift Ice Cruise 羅臼の流氷クルーズ)|西遊旅行 Saiyu Travel If one takes the photo zoomed in, without the port in the background, you can get surprisingly great photos that make the eagles look like they are in a very natural spot. There are Steller’s Sea Eagles and White-tailed Eagles feeding in the photo.
This is how it looks in the Fishing Port of Rausu with the accumulated Drift Ice.
The morning we arrived in Rausu, the staff at the lodging, Shiretoko Serai informed us right away, “Until last night, the conditions for the drift ice were very good, but the westerly wind is blowing, so its possible the drift ice might be gone by night time.”ĭue to the strong winds, the dawn cruise was cancelled, but luckily we could get a 9am cruise where we could see the Port of Rausu full of drift ice. This year the drift ice season in Rausu was very short. doi: 10.1006/ is a winter report from the Shiretoko Peninsula, Rausu (Hokkaido). doi: 10.3354/meps245239.ĭawson C, Vincent JF, Jeronimidis G, Rice G, Forshaw P. Foraging strategies of the black-legged kittiwake Rissa tridactyla at a North Sea colony: evidence for a maximum foraging range. doi: 10.1007/BF00263602.ĭaunt F, Benvenuti S, Harris M, DallAntonia L, Elston D, Wanless S. Diving metabolism and thermoregulation in common and thick-billed murres. Energy expenditures, activity budgets, and prey harvest of breding common murres. doi: 10.1086/515852.Ĭairns DK, Montevecchi WA, Birt-Friesen VL, Macko SA. Energy requirements of beavers (Castor canadensis) swimming underwater. Accordingly, spending time above their LCT on water at any time of year will provide enhanced benefits, particularly to seabirds such as rhinoceros auklets which rest a considerable amount of time on water.ĭaily energy expenditure Doubly labeled water Energy cost on water Heat loss Resting metabolic rate Resting seasurface Seabird Seasurface temperature Thermal conductivity Thermoregulation.Īllers D, Culik BM. Our results indicate that RMRs are elevated for auklets resting on water, particularly below their lower critical temperature (LCT), compared with in air. The DEE of free-ranging auklets averaged 1,005.5kJday 1 (130.2, n=3). Air temperature (5.020.0C) had no effect on RMR. While RMR on water did not vary significantly between 10C and 15C, it was significantly higher at 5C. We measured their resting metabolic rate (RMR) in air and on water by respirometry, and estimated their DEE by the doubly labeled water method. In order to estimate the cost of this behavior in terms of their daily energy expenditure (DEE), we studied rhinoceros auklets breeding on Teuri Island, Hokkaido Japan.
For example, rhinoceros auklet ( Cerorhinca monocerata), a medium-sized (480620 g) alcid, spends most of its time floating on the sea. Since the thermal conductivity of water is 25 times higher than that of air, seabirds resting on water lose heat and expend a considerable amount of energy for thermoregulation.
Seabirds spend most of their lives at sea, except when visiting their breeding sites.