Cost of being an intraguild predator in predatory ladybirds
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概要
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Survival and growth efficiency of fourth-instar larvae of two species of aphidophagous ladybirds, Coccinella septem-punctata brucki Mulsant and Harmonia axyridis Pallas were determined when fed aphid, Acyrthosiphon pisum Harris, or intraguild prey, another species of aphidophagous ladybird, Propylea japonica Thunberg. The percentage of fourth instars fed intraguild prey that completed their development was 42.9% for C, septempunctata brucki and 100% for H. axyridis, respectively. All fourth-instar larvae of both species fed aphids completed their development. The average growth efficiency (increase in body weight/weight of prey consumed) of fourth instars of H, axyridis was significantly lower than that of C. septempunctata brucki when fed aphids. In contrast, when fed intraguild prey, it was significantly higher than that of C. septempunctata brucki. Adaptive significance and determinants of prey specialization in aphidophagous ladybirds are discussed.
- 日本応用動物昆虫学会の論文
- 2008-02-25
著者
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Dixon Anthony
School Of Biological Sciences Univ. Of East Anglia
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Yasuda Hironori
Dep. Of Agriculture Yamagata Univ.
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Yasuda Hironori
Faculty Of Agriculture Yamagata University
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Sato Satoru
Faculty Of Agriculture Yamagata University
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JIMBO Rie
Faculty of Agriculture, Yamagata University
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Jimbo Rie
Faculty Of Agriculture Yamagata University
関連論文
- Effects of native ladybirds on oviposition of the exotic species, Adalia bipunctata (Coleoptera: Coccinellidae), in Japan
- Life history response of a predatory ladybird, Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae), to food stress
- Preface
- Preface
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- Vulnerability of larvae of two species of aphidophagous ladybirds, Adalia bipunctata Linnaeus and Harmonia axyridis Pallas, to cannibalism and intraguild predation
- Cost of being an intraguild predator in predatory ladybirds
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