Sex ratio distortion in populations and its possible role in insect suppression : Experimental studies with strains of Drosophila melanogaster carrying cytoplasmically-inherited male-killing spiroplasmas.

Fitz-Earle, M.; Sakaguchi, Bungo

doi:10.1266/jjg.61.447

Cited by 10 publications

(4 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It would be nonsense to pretend that the above model for early male killing is in any way an accurate predictor of the equilibrium frequency of cytoplasmic male killers (which is typically at around 10% (Ikeda 1970;Fitz-Earle & Sakaguchi 1986)). There is no allowance made for either any potential affect on fitness associated with the infection in females or the effect of the distortion of sex ratio.…”

Section: Late Male Killingmentioning

confidence: 99%

The incidences and evolution of cytoplasmic male killers

1991

Proc. R. Soc. Lond. B

221

View full text Add to dashboard Cite

Two types of male-killing cytoplasmic gene are distinguished by their time of action. Early male killers strike embryos, whereas late killers, so far only observed in mosquitoes, kill fourth instar larvae. Maternal inheritance of cytoplasmic factors underlies the sex bias in mortality in both instances. However, the evolutionary logic of early and late killing is, it is argued, otherwise different. Early male killing is interpreted in terms of kin selection. The death of male embryos early on allows resources (food or space) to be redistributed to the surviving females. A simple model relying on the redirection of resources after male death indicates that so long as a more than critical proportion o f 'freed' resources goes to females containing clonal relatives of the male-killing cytoplasmic gene, then that gene can invade and go to an equilibrium. This equilibrium is significant in that it allows a population to avoid extinction prior to the evolution of a nuclear repressor gene. The distribution of male killing is discussed in the light of these findings. The late male-killing microsporidians of mosquitoes differ from early male killing factors in possessing horizontal, as well as vertical, transmission between generations. It is argued that to maximize the efficiency of horizontal transmission it is in the interests of the microsporidians to maximize their number by waiting for the host to grow before killing it. Not all microsporidians kill only the male mosquito, some also kill the female. The variety of mosquito-microsporidian pathologies is interpreted by considering a trade-off between the efficiency of vertical against horizontal transmission. A review of possible incidences of cytoplasmic male killing is presented.

show abstract

Section: Late Male Killingmentioning

confidence: 99%

The incidences and evolution of cytoplasmic male killers

1991

Proc. R. Soc. Lond. B

221

View full text Add to dashboard Cite

show abstract

“…So far no male‐killing endosymbiont has been found in any natural population of D. melanogaster (Fitz‐Earle & Sakaguchi, 1986; Hurst, 1993). We report here for the first time the occurrence of a sex‐ratio trait in this species which is maternally inherited, infectious and caused by early MK.…”

Section: Introductionmentioning

confidence: 99%

Male-killing selfish cytoplasmic element causes sex-ratio distortion in Drosophila melanogaster

et al. 2000

View full text Add to dashboard Cite

Sex ratio distortion induced by a male-killing agent has been found to a ect Drosophila melanogaster. The trait was discovered accidentally in a collection of¯ies from markets in Campinas, SaÄ o Paulo State, Brazil. Repeated crosses with Canton-S males (for 15 generations to date) and successful transmission using the injection of macerates of sex ratio¯ies, have shown that the trait is inherited maternally, is cytoplasmic and is infectious. Crosses with strains marked with the visible mutation white and viability experiments at pre-adult stages of development, indicate that the skewed sex ratio results from male mortality before hatching. Males do not transmit the trait to their progeny.

show abstract

“…These studies have demonstrated that sublethal exposure to a variety of chemicals and pesticides can induce persistent disruptions in learning and memory (Aliouane et al 2009, Frost et al 2013, Siviter et al 2018). Similar patterns of reduced learning and memory in honeybees can be attributed to parasitic infection and environmental conditions, including temperature extremes and changes in light exposure (Fitz-Earle and Sakaguchi 1986, Frost et al 2011, Gegear et al 2006, Kralj et al 2007, Charbonneau et al 2016). Pest management strategies must, therefore, take into consideration potential negative consequences of pesticides, physical barriers, and other treatment options on pollinators and other beneficial insects.…”

Section: Challenges Associated With Insect Learning and Pest Managementmentioning

confidence: 83%

“…Use of sterile males is a useful strategy to mediate a variety of insects; however, results can vary among species or populations and are limited among insect species that mate with multiple partners (Fitz-Earle and Sakaguchi 1986). Many parasites and bacterial or viral pathogens are known to affect changes in host behavior, survival, resistance, and fecundity (Hurst and Jiggins 2000, Goodacre and Martin 2012).…”

Section: Future Directions For Pest Managementmentioning

confidence: 99%

Considerations for Insect Learning in Integrated Pest Management

Little

Chapman

Hillier

2019

Journal of Insect Science

View full text Add to dashboard Cite

The past 100 yr have seen dramatic philosophical shifts in our approach to controlling or managing pest species. The introduction of integrated pest management in the 1970s resulted in the incorporation of biological and behavioral approaches to preserve ecosystems and reduce reliance on synthetic chemical pesticides. Increased understanding of the local ecosystem, including its structure and the biology of its species, can improve efficacy of integrated pest management strategies. Pest management strategies incorporating insect learning paradigms to control insect pests or to use insects to control other pests can mediate risk to nontarget insects, including pollinators. Although our understanding of insect learning is in its early stages, efforts to integrate insect learning into pest management strategies have been promising. Due to considerable differences in cognitive abilities among insect species, a case-by-case assessment is needed for each potential application of insect learning within a pest management strategy.

show abstract

Sex ratio distortion in populations and its possible role in insect suppression : Experimental studies with strains of Drosophila melanogaster carrying cytoplasmically-inherited male-killing spiroplasmas.

Cited by 10 publications

References 37 publications

The incidences and evolution of cytoplasmic male killers

The incidences and evolution of cytoplasmic male killers

Male-killing selfish cytoplasmic element causes sex-ratio distortion in Drosophila melanogaster

Considerations for Insect Learning in Integrated Pest Management

Contact Info

Product

Resources

About