NDLI: Fecundity and fertility of ladybird beetle Harmonia axyridis after prolonged cold storage

Content Provider	Springer Nature Link
Author	Awad, Mona Kalushkov, Plamen Nedvědová, Tereza Nedvěd, Oldřich
Copyright Year	2013
Abstract	Some species of ladybird beetles (Coleoptera: Coccinellidae) mate both before and after overwintering. The purpose of the pre-diapause mating was studied in the alien invasive ladybird Harmonia axyridis (Pallas 1773). Our study demonstrates the persistence of high fecundity (daily oviposition rate of 21 eggs per fertilized female during the first month of reproduction) and fertility (85 % of eggs hatching) of females of H. axyridis after long storage (up to eight months) at low temperature (6 °C). The females were not mated after activation in spring and had to rely on the sperm supply maintained from the pre-winter period (58 % of females were fertilized). Unfertilized females also laid eggs but in low numbers (an average of 345 eggs by virgin females during an individual’s lifetime, 1,174 eggs by females fertilized before winter) and after a longer pre-oviposition period (2–5 weeks in comparison to 7–8 days for fertilized females). We show that the unfertilised eggs were not trophic eggs. The high sperm survival ability observed questions the need for the high levels of sexual activity generally observed in Coccinellidae. Fertilized females of H. axyridis may found large colonies after dispersal to new areas even without males, which contributes to the striking invasive ability of this species.
Starting Page	657
Ending Page	666
Page Count	10
File Format	PDF
ISSN	13866141
Journal	BioControl
Volume Number	58
Issue Number	5
e-ISSN	15738248
Language	English
Publisher	Springer Netherlands
Publisher Date	2013-03-15
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ladybird Hatching rate Overwintering Reproduction Protein Mating Entomology Plant Pathology Agriculture Animal Ecology Animal Biochemistry Behavioural Sciences
Content Type	Text
Resource Type	Article
Subject	Insect Science Agronomy and Crop Science

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Fecundity and fertility of ladybird beetle Harmonia axyridis after prolonged cold storage

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