@article{oai:nipr.repo.nii.ac.jp:00006215,
 author = {Kato, Akiko and Watanabe, Kentaro and Naito, Yasuhiko},
 journal = {Polar bioscience},
 month = {Feb},
 note = {P(論文), The trends of penguin populations are thought to be reliable indicators of ecosystem changes in the Southern Ocean. There are seven Ad_lie penguin colonies and one emperor penguin colony along the Prince Olav Coast and one emperor penguin colony on the Riiser-Larsen Peninsula. We compiled and analyzed the available data collected by airborne and ground census between 1971 and 2000 in order to determine the breeding status of penguins in this area. Ad_lie penguin populations increased at two colonies; no apparent trends were observed at other colonies. Emperor penguin populations were high in the mid-1990s and suddenly decreased in 2000. Populations need to be carefully monitored in the coming years.},
 pages = {117--122},
 title = {Population changes of Ad_lie and emperor penguins along the Prince Olav Coast and on the Riiser-Larsen Peninsula},
 volume = {17},
 year = {2004}
}