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Widow Spider Mating

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Immature mating as a novel tactic of an invasive widow spider

Female widow spiders are frequently cannibalistic, but males of the invasive brown widow spider Latrodectus geometricus can avoid being eaten by mating with immature females that never attack their mating partners. Although immatu... ver más

09/05/2023

233K€

Presupuesto del proyecto: 233K€

Líder del proyecto

UNIVERSITAET GREIFSWALD No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Fecha límite participación Sin fecha límite de participación.

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Financiación concedida El organismo H2020 notifico la concesión del proyecto el día 2023-05-09

MSCA-IF-2018: Individual Fellowships Objective:The goal of the Individual Fellowships is to enhance the creative and innovative potential...

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3 Participantes

233.43K€ | Lider

THE GOVERNING COUNCIL OF THE...

UNIVERSITY OF TORONTO

152.03K€ | Participante

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Duración del proyecto: 49 meses Fecha Inicio: 2019-04-03
Fecha Fin: 2023-05-09

Líder del proyecto

UNIVERSITAET GREIFSWALD No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 233K€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto Female widow spiders are frequently cannibalistic, but males of the invasive brown widow spider Latrodectus geometricus can avoid being eaten by mating with immature females that never attack their mating partners. Although immature females are generally assumed unable to mate due to the lack of developed external genitalia, in this species they readily mate and produce offspring at maturity. Nevertheless, despite the benefits arising from immature mating, males consistently prefer to mate with adult, cannibalistic females. Sexual cannibalism is generally considered detrimental for the male, but in L. geometricus it represents a male adaptive strategy which brings advantages in terms of lower female propensity to re-mate. Therefore, its lack in immature mating may come at cost of paternity loss due to female re-mating. I suggests a trade-off between mating rate and reproductive assurance. In the proposed project, I will test the hypothesis that immature mating is costly for the male. I will investigate the mechanism of immature mating as well as ultimate fitness consequences for the male in terms of paternity. I will use a multidisciplinary approach, combining state-of-the-art behavioural, morphological and molecular methods. Utilizing the expertise and infrastructure in two excellent institutions: University of Greifswald and University of Toronto, I will enhance international collaboration and knowledge transfer among research teams. At the University of Greifswald, mating systems are studied by a combination of behavioural and morphological approaches. Using advanced tools to study and visualize internal structures crucial for understanding reproductive biology, I will characterize the morphological mechanisms and structures associated with immature mating. At the University of Toronto, I will use established husbandry infrastructure and molecular techniques to determine behavioural correlates of paternity, and links to female reproductive output.

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