NDLI: Density-mediated indirect effects of a common prey tadpole on interaction between two predatory bugs: Kirkaldyia deyrolli and Laccotrephes japonensis

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Density-mediated indirect effects of a common prey tadpole on interaction between two predatory bugs: Kirkaldyia deyrolli and Laccotrephes japonensis

Content Provider	Springer Nature Link
Author	Ohba, Shin ya Nakasuji, Fusao
Copyright Year	2007
Abstract	This paper suggests that the nymphs of a specialist predator, Kirkaldyia (=Lethocerus) deyrolli (Belostomatidae: Heteroptera), are indirectly affected by their tadpoles’ prey. K. deyrolli nymphs and the predator Laccotrephes japonensis (Nepidae: Heteroptera) adults coexist in rice paddy fields. It was predicted that the difference in tadpole density may influence the K. deyrolli nymph survival rate. We first compared survival rates of the first instar nymphs of K. deyrolli in June (high tadpole density period) and July (low tadpole density period). Secondly, we investigated the survival rate of K. deyrolli nymphs at different tadpole densities and under the presence or absence of L. japonensis adults to examine whether higher tadpole density moderates predation pressure from L. japonensis adults to K. deyrolli nymphs, e.g., density-mediated indirect effects. As a result of the comparison, the survival rate of K. deyrolli nymphs in June was higher than that in July. For the field experiment, the slopes between the survival rate of K. deyrolli nymphs and tadpole density were positive under both predator presence and absence. However, the slope under the presence of a predator was steeper than that under absence of the predator (“predator-by-tadpole density interaction” was significant). These results suggest that a higher tadpole density in June provides an abundant food resource for K. deyrolli nymphs and also moderates predation pressure from L. japonensis.
Starting Page	331
Ending Page	336
Page Count	6
File Format	PDF
ISSN	14383896
Journal	Population Ecology
Volume Number	49
Issue Number	4
e-ISSN	1438390X
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-07-13
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Exploitative competition Intraguild predation Anuran larva Temporary water Rice field Antagonistic interaction Forestry Behavioural Sciences Evolutionary Biology Plant Sciences Zoology Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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Density-mediated indirect effects of a common prey tadpole on interaction between two predatory bugs: Kirkaldyia deyrolli and Laccotrephes japonensis

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