シジュウカラ

シジュウカラの婚外婚（浮気）の研究で学位論文を書きました。博士論文は『Molecular ecology of the great tit Parus major』というタイトルでした．鳥類目録第7版からは日本のシジュウカラの学名がParus minor に変わっちゃいましたね．

• Kawano,K.M.,Yamaguchi, N.,Kasuya,E.. and Yahara,T. 2009 Extra-pair mate choice in the female great tit Parus major: good males or compatible males Journal of Ethology, 27: 349-359 (SpringerLink)

Kawano et al.(2009) _ Abstract：

The good genes hypothesis and the genetic compatibility hypothesis are the two main hypotheses that focus on the genetic benefit that a female can gain through her choice of a mate. We tested the two hypotheses on extra-pair mating in the great tit, Parus major. We found that female great tits choose males on the basis of breast stripe width, which is in accordance with the good genes hypothesis. Although females chose less related extra-pair males, the evidence for female choice for compatible males was overall weak. However, our data suggest a post-copulatory mechanism of inbreeding avoidance. The observed individual inbreeding coefficient, F, was similar for withinpair offspring (WPO) and extra-pair offspring (EPO). The observed individual F of WPO was lower than the expected individual F, whereas the observed F of EPO was similar to what was expected. These results highlight the importance of processes after copulation for the outcome of female mate choice. Our study shows that in a system with apparent pre-copulatory female choice for good genes, a post-copulatory mechanism may still promote the production of offspring that carry compatible genes.

福岡県福岡市の油山で毎日脚立をもって巣箱を巡回しておりました。

マルハナバチが巣箱をのっとった事例は、韓国でも見つかっています。

• 三上かつら・山口典之 2011. コマルハナバチによるカラ類の巣の乗っ取り Strix 27:53-61

函館でも色々たくらんでいます。まあそのうちに。