Comparison of Age-at-Death Patterns in the Irruption and Post-Population-Crash Phases of an Introduced Sika Deer (Cervus nippon) Population Takeshita, Kazutaka M. and Kubo, Mugino O. and Ueno, Mayumi and Ishizaki, Mari and Takahashi, Hiroshi and Yoshida, Tsuyoshi and Igota, Hiromasa and Ikeda, Takashi and Kaji, Koichi, Mammal Study, 46, 77-84 (2021), DOI:http://dx.doi.org/10.3106/ms2020-0009