山階鳥類学雑誌
Online ISSN : 1882-0999
Print ISSN : 1348-5032
ISSN-L : 1348-5032
報告
シジュウカラの繁殖個体群
齋藤 隆史浅川 真理
著者情報
ジャーナル フリー

2009 年 40 巻 2 号 p. 104-116

詳細
抄録

The breeding season of the Great Tit Parus major is divided into two periods: the early and late seasons. In the early breeding population, the number of pairs varied from 45 to 152, with an average of 102±24 SD. In comparison, the late population was smaller than the early population every year and varied from 30 to 95, with an average of 54±18 SD pairs. Half of the early breeders were adult breeders from the previous year, and most of the remaining breeders were young belonging to winter flocks in previous years. The late breeding population consisted mainly of pairs that were producing their second brood that season, and repeat breeders whose first brood had failed. The proportion of adult male and adult female pairs was higher than other pairs. Most pairs were faithful, but divorce occurred every year. The population also included some pairs that did not breed and single males. The longevity was nine years in males and seven years in females.

著者関連情報
© 2009 公益財団法人 山階鳥類研究所
前の記事 次の記事
feedback
Top