Sex allocation by a parasitoid wasp (Hymenoptera: Ichneumonidae) to different host species: A question for the mechanism of host size estimation

研究成果: Contribution to journalArticle査読

13 被引用数 (Scopus)

抄録

Sex allocation by the polyphagous solitary pupal parasitoid wasp Pimpla luctuosa Smith to a small host species, Galleria mellonella (L), and a large host species, Mamestra brassicae L., was investigated to test whether female wasps responded to hosts of different sizes across different host species. In the experiments, both host species were presented to each test female wasp. Primary and secondary sex ratio experiments revealed that female wasps laid more female eggs in larger pupae of each host species, indicating that female wasps recognized size differences within host species. The wasp sex ratio (male ratio) from M. brassicae, however, was much higher than that expected on the basis of the sex ratio curve from different-sized G. mellonella. Larger hosts of each host species yielded larger wasps, indicating that the host size estimation by female was across different host species was incomplete or was not simple. These results suggested that P. luctuosa evaluated host size not only by physical measures such as dimension but also by other unknown measures. A possible explanation for the adaptiveness of different sex ratio responses by Pimpla luctuosa to different host species was discussed.

本文言語英語
ページ(範囲)811-821
ページ数11
ジャーナルJournal of Insect Behavior
11
6
DOI
出版ステータス出版済み - 1 1 1998

All Science Journal Classification (ASJC) codes

  • 生態、進化、行動および分類学
  • 昆虫科学

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