Robustness of adult female survival maintains a high-density sika deer (Cervus nippon) population following the initial irruption

被引:11
作者
Ueno, M. [1 ]
Iijima, H. [2 ]
Takeshita, K. [3 ]
Takahashi, H. [4 ]
Yoshida, T. [5 ]
Uehara, H. [5 ]
Igota, H. [5 ]
Matsuura, Y. [6 ]
Ikeda, T. [3 ]
Azumaya, M. [7 ]
Kaji, K. [3 ]
机构
[1] Hokkaido Res Org, Inst Environm Sci, Eastern Field Stn, Kushiro, Hokkaido 0858588, Japan
[2] Forestry & Forest Prod Res Inst, Dept Forest Sci, Lab Wildlife Biol, Tsukuba, Ibaraki 3058687, Japan
[3] Tokyo Univ Agr & Technol, Dept Agr, Lab Wildlife Management, Fuchu, Tokyo 1838509, Japan
[4] Forestry & Forest Prod Res Inst, Kansai Res Ctr, Kyoto, Kyoto 6120855, Japan
[5] Rakuno Gakuen Univ, Dept Environm & Symbiot Sci, Ebetsu, Hokkaido 0698501, Japan
[6] Forestry & Forest Prod Res Inst, Hokkaido Res Ctr, Sapporo, Hokkaido 0628516, Japan
[7] Yezo Deer Assoc, Sapporo, Hokkaido 0640803, Japan
关键词
population density; population dynamics; population growth; radio-telemetry; survival; wildlife management; LARGE-HERBIVORE; RED DEER; SEXUAL SELECTION; EASTERN HOKKAIDO; TEMPORAL-CHANGES; MORTALITY-RATES; FOOD-HABITS; MOLAR WEAR; DYNAMICS; AGE;
D O I
10.1071/WR17103
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Context. Irruption of large herbivore populations is characterised by three distinct phases: (1) an exponential increase in population to a peak abundance; (2) a population crash; and (3) a second increase to another population peak, typically lower than the first peak of abundance. However, there has been little study of age-and sex-specific factors that affect the post-initial irruption interactions with food sources. Aims. We aimed to investigate annual survival rates of sika deer (Cervus nippon Temminck, 1838) in the sequent irruption of a population on Nakanoshima Island, Lake Toya, Japan, with a chronically high density during the period 2002-12. Methods. Survival monitoring data were obtained for 219 individuals (93 males and 126 females) using radio-collars. Annual survival was quantified, and related factors, i.e. deer abundance and winter severity, were determined by model selection using Akaike information criterion values. Key Results. The results showed that annual survival rates across sexes and age classes (fawn, yearling, prime-aged, old) decreased with increasing population density, snow depth and winter precipitation. Winter severity had a greater effect on adult survival than density regulation. Nevertheless, female adult survival was maintained at a high level, with a mean of 0.84 (95% CI: 0.80-0.88). Key conclusions. Robust survival rates for adult females might contribute to the maintenance of a high-density sika deer population in the post-initial irruption.
引用
收藏
页码:143 / 154
页数:12
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