MORTALITY OF BRITISH GREY HERONS

被引:22
作者
MEAD, CJ [1 ]
NORTH, PM [1 ]
WATMOUGH, BR [1 ]
机构
[1] UNIV KENT INST MATH,CANTERBURY CT2 7NF,KENT,ENGLAND
关键词
D O I
10.1080/00063657909476611
中图分类号
Q95 [动物学];
学科分类号
071002 ;
摘要
This study of Grey Heron mortality suggests that the British population would have been in a parlous state if legal protection (which increased first-year survivalj had not been introduced. Even now, an increased proportion of first-summer birds needs to join the breeding population for numbers to be maintained. © 1979 Taylor & Francis Group, LLC.
引用
收藏
页码:13 / 22
页数:10
相关论文
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