2018年7月1日
Predator size divergence depends on community context
Ecology Letters
- ,
- 巻
- 21
- 号
- 7
- 開始ページ
- 1097
- 終了ページ
- 1107
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1111/ele.12976
- 出版者・発行元
- Blackwell Publishing Ltd
Body size is a multi-functional trait related to various fitness components, but the relative importance of different selection pressures is seldom resolved. In Carabus japonicus beetles, of which the larvae exclusively prey on earthworms, adult body size is related to the presence/absence of a larger congener and habitat temperature. In sympatry, C. japonicus consistently exhibits smaller body size which is effective for avoiding interspecific mating, but in allopatry, it shows size variation unrelated to temperature. Here, we show that this predator–size variation is attributed to prey–size variation, associated with high phylogenetic diversity in earthworm communities. In allopatry, the predator size was larger where larger prey occurred. Larger adult size may have been selected because larger females produce larger larvae, which can subdue larger prey. Thus, in the absence of a larger congener, variation in prey body size had a pronounced effect on geographic body size divergence in C. japonicus.
- リンク情報
- ID情報
-
- DOI : 10.1111/ele.12976
- ISSN : 1461-0248
- ISSN : 1461-023X
- SCOPUS ID : 85046689095