Abnormal Sex-Ratio Found in the Lady Beetle, Harmonia axyridis PALLAS (Coleoptera : Coccinellidae)

Matsuka, Mitsuo; Hashi, Hideo; Okada, Ihiji

doi:10.1303/aez.10.84

Cited by 40 publications

(24 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Abnormal sex ratios ' were also later observed in Har. axyridis (Matsuka et al 1975 ) and Menochilus sexmaculatus (Niijima & Nakajima 1981 ). Hurst et al (1992) reported similar fi ndings from a British sample of A. bipunctata , and postulated the causative agent of the ' sex ratio ' trait to be a cytoplasmically inherited bacterium which kills males, since normal sex ratios were obtained after oral administration of tetracycline to affected females.…”

Section: Male -K Illing B Acteriamentioning

confidence: 99%

“…The cost to females of bearing a male -killing bacterium , in addition to the loss of male progeny, has been assessed in fi ve species of coccinellid (Matsuka et al 1975, Hurst et al 1999b, Majerus 2001. Each case has shown some negative fi tness effects, such as decreased oviposition rates, lower overall fecundity, higher infertility levels or shorter adult life -span.…”

Section: Evolutionary I Mplications Of M Ale -K Illing In the Coccinementioning

confidence: 99%

See 1 more Smart Citation

Natural Enemies of Ladybird Beetles

Ceryngier

Roy

Poland

2012

Ecology and Behaviour of the Ladybird Beetles (Coccinellidae)

114

View full text Add to dashboard Cite

Section: Male -K Illing B Acteriamentioning

confidence: 99%

Section: Evolutionary I Mplications Of M Ale -K Illing In the Coccinementioning

confidence: 99%

Natural Enemies of Ladybird Beetles

Ceryngier

Roy

Poland

2012

Ecology and Behaviour of the Ladybird Beetles (Coccinellidae)

114

View full text Add to dashboard Cite

“…Harmonia axyridis Matsuka et al (1975), Hu (1979), Majerus et al (1998) Spiroplasma sp. Majerus et al (1999) Cheilomenes sexmaculata (=Menochilus sexmaculatus) Niijima and Nakajima (1981), Majerus and Majerus (2010b) not been confirmed, and some which should be unlikely to carry male-killers for ecological or behavioural reasons.…”

Section: Methodsmentioning

confidence: 99%

Male-killing in the Coccinellidae: testing the predictions

Majerus

Majerus²

2011

Evol Ecol

View full text Add to dashboard Cite

Male-killing endosymbionts have been widely reported in the invertebrates and are highly prevalent in the Coccinellidae. The presence of male-killers can lead to extreme bias in host population sex ratios and may have important and far-reaching consequences for the life-history and evolution of their hosts. Male-killers may have direct and indirect effects on host fitness and reproductive behaviour, as well as affecting the host genome, either via strong selection pressure imposed by highly female-biased population sex ratios or by selective sweeps caused as a male-killer conferring an advantage to infected individuals spreads through a population. Criteria used to predict which species are liable to male-killer invasion, based on a variety of ecological factors, have been produced. In summary male-killers are predicted to occur in aphidophageous species, that lay eggs in clutches, show sibling egg consumption and are liable to neonatal larval mortality due to starvation. We assayed 30 species of Coccinellid for the presence of such male-killers to assess the predictive accuracy of the criteria. Male-killers were identified in 8 species in which they were predicted to occur and were absent from all 10 species predicted not to harbor them. Analysis of the remaining 12 species, where male-killers were predicted by the original criteria, but where they were not found, allowed us to identify areas where the criteria can be refined and improved. We conclude that whilst the original criteria give a reasonably accurate prediction, there are refinements and improvements, concerning details of host diet and life-history, which make them more robust, especially in the light of discoveries of male-killing suppressors and when incorporated give a better fit to our findings from field samples. Michael E. N. Majerus-deceased. Electronic supplementary material The online version of this article (

show abstract

“…This "best" malekiller does not seem to occur among those that infect coccinellids. In none is the vertical transmission efficiency perfect (Table 1), in A. decempunctata and Cheilomenes sexmaculatus, infected males sometimes survive to adulthood Majerus, 2003a), and in all coccinellid cases studied (but not in one butterfly species (Jiggins et al, 2002)), male-killers have been shown to have direct costs on infected females (Matsuka et al, 1975;Hurst et al, 1994;Majerus, 2003a). Why is this the case?…”

Section: Selection On Host Nuclear Genomes: Vertical Transmission Sumentioning

confidence: 99%

“…*** Prevalence of male-killer uncertain due to presence of male rescue gene (see text). Matsuka et al, 1975;Zakharov et al, 1996;Majerus et al, 1998Majerus et al, , 1999Majerus, 2001Majerus, , 2003a Hurst et al, 1992Hurst et al, , 1999aWerren et al, 1994;Schulenburg, 2000;Zakharov & Shaikevich, 2001;Majerus, 2003a;Tinsley, 2003;Majerus, unpubl Majerus 1999Majerus , 2003a male-killer infection of individual coccinellids, or a response to changes in coccinellid population sex ratios and demography as a result of male-killer presence.…”

Section: Introductionmentioning

confidence: 99%

The impact of male-killing bacteria on the evolution of aphidophagous coccinellids

Majerus¹

2006

Eur. J. Entomol.

View full text Add to dashboard Cite

Abstract. Many aphidophagous coccinellids harbour male-killing bacteria. These maternally inherited bacteria kill males early in embryogenesis, female offspring of infected mothers gaining a large resource advantage from the consumption of their dead brothers. In this paper, the diversity of male-killing bacteria and their coccinellid hosts will be briefly reviewed. Thereafter, the impact that invasion by male-killers has on coccinellid hosts will be addressed in two ways. First, the selective effects due to the loss of male progeny, and the intra-genomic conflict resulting from the cytoplasmic inheritance of the bacteria will be considered. Reductions in mitochondrial diversity, effects on clutch sizes and the evolution of male-killer suppresser systems will be discussed. Second, the impact of female biased population sex ratios on the evolution of reproductive strategies and the primary sex ratio will be investigated. Preliminary results suggesting changes in male investment per copulation, reductions in female testing behaviour of males, and male biases in the progenic sex ratios of some uninfected male lines will be presented. Avenues for future work will be outlined.

show abstract

Abnormal Sex-Ratio Found in the Lady Beetle, Harmonia axyridis PALLAS (Coleoptera : Coccinellidae)

Cited by 40 publications

References 5 publications

Natural Enemies of Ladybird Beetles

Natural Enemies of Ladybird Beetles

Male-killing in the Coccinellidae: testing the predictions

The impact of male-killing bacteria on the evolution of aphidophagous coccinellids

Contact Info

Product

Resources

About