Oviposition and host‐feeding patterns inAphelinus asychis(Hymenoptera: Aphelinidae) at different aphid densities
作者:
B. BAI,
M. MACKAUER,
期刊:
Ecological Entomology
(WILEY Available online 1990)
卷期:
Volume 15,
issue 1
页码: 9-16
ISSN:0307-6946
年代: 1990
DOI:10.1111/j.1365-2311.1990.tb00778.x
出版商: Blackwell Publishing Ltd
关键词: Key words.;Aphelinidae;Aphelinus asychis;host density;host‐feeding;oosorption;oviposition;reproductive strategies
数据来源: WILEY
摘要:
Abstract.1. The patterns of host‐feeding and oviposition were examined inAphelinus asychisWalker, which had been provided with second‐instar pea aphids as hosts.2. Female wasps responded to increasing host density (between one and forty aphids for 24 h) with an increasing tendency to oviposit rather than to feed. Superparasitism occurred at all aphid densities, even when unparasitized aphids were available.3. Aphids intended for feeding were paralysed and died. Wasps did not feed on and oviposit in the same aphid.4. Feeding to satiation lasted between 4 min and 42 min. Females that had starved for ≰18 h generally deposited one or more eggs before feeding again, while the reverse was true in wasps that had starved for 21 h.5. The host‐feeding behaviour ofA. asychisis determined by a female's nutritional status. At low rates of host encounter, the anhydropic eggs may be resorbed. This reproductive strategy conforms to the destructive non‐concurrent type among the Hy
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