Section outline

    • Prey and distribution of seabirds can be a useful indicator of climate-driven marine ecosystem change in areas where conventional boat surveys are difficult. How does the decrease of sea ice in the Arctic and Antarctic Seas affect the marine ecosystem and how do seabirds respond? We found that the short-tailed shearwaters moved into the Chukchi Sea through the Bering Strait in late summer. Thus the Chukchi Sea could be a key area to store energy before 2 weeks of migration to the south. A study by Oshoromaru under the ArCS project showed that the krill, the main diet of this seabird species, was smaller in summer but grew in autumn to be the suitable size as prey of this seabird species.

      Short-tailed shearwaters and the route of migration of 14 individuals