Effect of rearing density on the expression of fitness-related traits in male sand field crickets (Gryllus firmus)

Kelly, Clint D.; L’Heureux, Valérie; Wey, Tina W.; Réale, Denis

doi:10.1007/s10682-023-10251-7

Evol Ecol

2023

DOI: 10.1007/s10682-023-10251-7

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Effect of rearing density on the expression of fitness-related traits in male sand field crickets (Gryllus firmus)

Clint D. Kelly

Valérie L’Heureux

Tina W. Wey

et al.

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2024

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Effect of rearing density on female investment in reproduction and melanotic encapsulation response in the sand cricket (Gryllus firmus) (Orthoptera: Gryllidae)

Kelly,

L’Heureux

2024

Biological Journal of the Linnean Society

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The density-dependent prophylaxis hypothesis posits that because pathogens are expected to be transmitted among conspecifics in crowded conditions, individuals living in such conditions should minimize their chance of infection and maximize survival by elevating their baseline immunity. Further, if individuals developing in crowded conditions indeed allocate more resources to immunity then resource allocation to other life-history traits, such as reproduction, should decline. We tested these hypotheses by rearing sand crickets (Gryllus firmus) at either low or high density in the laboratory and quantified immune function (melanotic encapsulation response) and reproductive investment (ovary mass, egg size) at adulthood. The results did not support the density-dependent prophylaxis hypothesis, but we did find that rearing density significantly affected investment in two reproductive traits, with average ovary mass and egg size both being larger in low-density crickets. We discuss possible explanations for the lack of a trade-off between immunity and reproduction in our study.

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Effect of rearing density on female investment in reproduction and melanotic encapsulation response in the sand cricket (Gryllus firmus) (Orthoptera: Gryllidae)

Kelly,

L’Heureux

2024

Biological Journal of the Linnean Society

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Effect of rearing density on the expression of fitness-related traits in male sand field crickets (Gryllus firmus)

Cited by 1 publication

References 39 publications

Effect of rearing density on female investment in reproduction and melanotic encapsulation response in the sand cricket (Gryllus firmus) (Orthoptera: Gryllidae)

Effect of rearing density on female investment in reproduction and melanotic encapsulation response in the sand cricket (Gryllus firmus) (Orthoptera: Gryllidae)

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