Lack of parasite-mediated sexual selection in a ladybird/sexually transmitted disease system

Webberley, K. Mary; Hurst, Gregory D. D.; Buszko, J.; Majerus, Michael E. N.

doi:10.1006/anbe.2001.1877

Cited by 53 publications

(47 citation statements)

References 31 publications

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“…The prevalence of infectious females was also related to the proportion of males becoming infected (Fig. 2) but did not significantly affect mating rate, confirming that infection status did not alter the probability of mating (28).…”

Section: Resultsmentioning

confidence: 60%

“…bipunctata has failed to find any effect of infection status on mating behavior also suggests that an interaction is unlikely (28).] Second, the fact that the frequency-dependent term dropped out of the minimum adequate model in our analysis suggests that any increase in the relative importance of frequency dependence with increasing density was relatively low.…”

Section: Discussionmentioning

confidence: 92%

“…Laboratory studies have also established that the survivorship of both sexes is further reduced by infection when the beetles are nutritionally stressed (J.J.R., J. Hathway, and R.J.K., unpublished data). Perhaps surprisingly, neither sex seems to differentiate between infected and uninfected partners, and infection status does not affect mating success (28).…”

mentioning

confidence: 97%

“…Females were used as the infectious sex, and transmission was measured from females to males. We did not use the reciprocal male-to-female design because host sex does not affect transmission efficiency in this system (26) and infection status does not affect host mating behavior (28).…”

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confidence: 99%

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Measuring the transmission dynamics of a sexually transmitted disease

Ryder

Webberley

Boots

et al. 2005

Proc. Natl. Acad. Sci. U.S.A.

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Sexually transmitted diseases (STDs) occur throughout the animal kingdom and are generally thought to affect host population dynamics and evolution very differently from other directly transmitted infectious diseases. In particular, STDs are not thought to have threshold densities for persistence or to be able to regulate host population density independently; they may also have the potential to cause host extinction. However, these expectations follow from a theory that assumes that the rate of STD spread depends on the proportion (rather than the density) of individuals infected in a population. We show here that this key assumption (''frequency dependence''), which has not previously been tested in an animal STD system, is invalid in a simple and general experimental model. Transmission of an STD in the two-spot ladybird depended more on the density of infected individuals in the study population than on their frequency. We argue that, in this system, and in many other animal STDs in which population density affects sexual contact rate, population dynamics may exhibit some characteristics that are normally reserved for diseases with density-dependent transmission.density dependence ͉ frequency dependence ͉ population dynamics ͉ parasite ͉ infection

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Section: Resultsmentioning

confidence: 60%

Section: Discussionmentioning

confidence: 92%

mentioning

confidence: 97%

mentioning

confidence: 99%

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Measuring the transmission dynamics of a sexually transmitted disease

Ryder

Webberley

Boots

et al. 2005

Proc. Natl. Acad. Sci. U.S.A.

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“…Once on a new host, larval mites embed their mouthparts into the ventral surface of the host elytra and feed on haemolymph, metamorphosing into adults. Within a few weeks, much of the ventral surface of the elytra is covered with mite adults, eggs and larvae (Webberley et al 2002). In A. bipunctata, the mite has strong negative effects on male and female hosts, increasing overwintering mortality, particularly in males (Webberley et al 2002) and reducing both fecundity and egg viability in females, the latter eventually to zero (Hurst et al 1995).…”

Section: Parasitic Mitementioning

confidence: 99%

Current and potential management strategies against Harmonia axyridis

et al. 2007

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This paper reviews the current and potential methods to control the harlequin ladybird, Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae), an Asian predatory beetle invasive in Europe and the Americas where it has become a human nuisance, a grape and wine pest and a threat to native biodiversity. Current methods to manage this invasive species include: techniques to mechanically prevent adult beetles from entering buildings in autumn or to remove aggregates of beetles inside buildings, e.g. using various trapping methods; the use of insecticides on buildings or in vineyards to prevent aggregation in houses or on grapes; cultivation practices in vineyards to lower the impact of the ladybird on grape production and wine quality; remedial treatments for wine tainted by the ladybird. Other methods are presently being developed or considered. Semiochemicals could be used as deterrents or as attractants to develop more efficient trapping systems in buildings and open fields. Natural enemies include pathogens, parasitoids, predators and a parasitic mite but few of them show potential as biological control agents. While management methods presently used or under development may eventually solve the problems caused by beetles aggregating in buildings or vineyards, the issue of H. axyridis populations outcompeting native species is much more challenging. Only the sudden adaptation of a native natural enemy or the importation of a natural enemy from the area of origin of the ladybird may M. Kenis (&) Á R.

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The Host Population

Castrillo

2017

Ecology of Invertebrate Diseases

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Lack of parasite-mediated sexual selection in a ladybird/sexually transmitted disease system

Cited by 53 publications

References 31 publications

Measuring the transmission dynamics of a sexually transmitted disease

Measuring the transmission dynamics of a sexually transmitted disease

Current and potential management strategies against Harmonia axyridis

The Host Population

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