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Melanism: Evolution in Action
- M. Majerus
The peppered moth story dissected and the future of research into melanism, the diversity of melanics, and the principles of genetics are examined.
Harmonia axyridis in Europe: spread and distribution of a non-native coccinellid
It is predicted that the spread and increase within Europe will continue and that H. axyridis will become one of the most widely distributed coccinellids in the continent.
Male–killing Wolbachia in two species of insect
Observations reinforce the notion that Wolbachia may be an important agent driving arthropod evolution, and corroborates previous suggestions that male–killing behaviour is easily evolved by invertebrate symbionts.
Intraguild predation involving Harmonia axyridis: a review of current knowledge and future perspectives
This paper will specifically review the existing data on intraguild predation involving H. axyridis, and consider the strength and symmetry of such interactions both within its native guild and within exotic guilds where it has established as an invasive alien.
Rickettsial relative associated with male killing in the ladybird beetle (Adalia bipunctata)
- J. Werren, G. Hurst, W. Zhang, J. Breeuwer, R. Stouthamer, M. Majerus
- BiologyJournal of bacteriology
- 1 January 1994
Discovery of a close relative of rickettsias associated with sex ratio distortion in insects has implications for the evolution and population dynamics of this bacterial genus.
The potential impacts of the arrival of the harlequin ladybird, Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae), in Britain
The harlequin ladybird, Harmonia axyridis, has recently arrived in Britain and is likely to be a threat to current and future generations of ladybirds.
Intraguild predation of immature stages of British and Japanese coccinellids by the invasive ladybird Harmonia axyridis
Investigating intraguild predation between immature stages of H. axyridis and various British and Japanese coccinellids finds no evidence that Japanese species have superior defences to British ones and suggests that behavioural strategies may enable co-existence in the native range.
Harmonia axyridis in Great Britain: analysis of the spread and distribution of a non-native coccinellid
The objective of this study was to quantify and analyse the spread of H. axyridis in its early stages of invasion in Great Britain, and to present evidence of bi-voltinism in the population in 2006.
The butterfly Danaus chrysippus is infected by a male-killing Spiroplasma bacterium
Danaus chrysippus is a surprising host for a male-killer as its eggs are laid singly, suggesting that the ecological conditions permitting male-killers to invade may be more widespread than previously realized.
Interactions between ants and aphidophagous and coccidophagous ladybirds
The chemical and physical defences that coccinellids use against ant aggression are described and whether these have evolved as general anti-predator deterrents or specifically in response to ants are considered.