Competitive interactions between an exotic and a native ladybeetle: a field cage study
書誌事項
- 公開日
- 2004-03-24
- 権利情報
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- http://onlinelibrary.wiley.com/termsAndConditions#vor
- DOI
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- 10.1111/j.0013-8703.2004.00157.x
- 公開者
- Wiley
この論文をさがす
説明
<jats:title>Abstract</jats:title><jats:p>We conducted field‐cage studies on the direct interactions between a coccinellid species native to North America, <jats:italic>Coleomegilla maculata</jats:italic> De Geer, and a species introduced from Asia, <jats:italic>Harmonia axyridis</jats:italic> (Pallas) (Coleoptera: Coccinellidae). We compared the mortality and weight gain of larvae of both species in field cages that enclosed one or both species with corn plants containing high or low aphid numbers. We did not find a significant effect of the presence of <jats:italic>H. axyridis</jats:italic> on the survival or weight gain of <jats:italic>C. maculata</jats:italic>, but <jats:italic>H. axyridis</jats:italic> larvae weighed more when kept with <jats:italic>C. maculata</jats:italic> for 5 days than when kept with equal numbers of conspecifics. This suggests that intraspecific competition was stronger for <jats:italic>H. axyridis</jats:italic> than the interspecific competition with <jats:italic>C. maculata</jats:italic>. The spatial distribution of <jats:italic>C. maculata</jats:italic> over the plants differed between single‐species and two‐species treatments in a manner that suggested that this species avoided interactions with <jats:italic>H. axyridis</jats:italic>.</jats:p>
収録刊行物
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- Entomologia Experimentalis et Applicata
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Entomologia Experimentalis et Applicata 111 (1), 19-28, 2004-03-24
Wiley