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Courtship song and immune function in the field cricket Gryllus bimaculatus
TLDR
It seems possible that by preferring males according to their courtship song, females might benefit by increasing the parasite resistance of their offspring by choosing males with high immunocompetence.
Integrating behaviour with life history: boldness of the field cricket, Gryllus integer, during ontogeny
TLDR
Whether boldness, measured as hiding behaviour, is repeatable during ontogeny in the field cricket, Gryllus integer, and if it relates to the efficiency of immune function is studied to arise from a trade-off between immunity-dependent survival and bold behaviour.
Condition dependence of pheromones and immune function in the grain beetle Tenebrio molitor
TLDR
The results show that pheromones are condition-dependent signals, the quantity of which females use in their mate choice, and the production of the phersomones is affected by the condition of the male.
Sex differences in the repeatability of boldness over metamorphosis
TLDR
The repeatability of boldness was repeatable across metamorphosis in females, but not in males and nymphs were bolder than adults and that individuals spent more time immobile in response to a predator cue when they were nymphS, versus when they was adults.
The role of juvenile hormone in immune function and pheromone production trade-offs: a test of the immunocompetence handicap principle
TLDR
The results reflect a general mechanism by which the immunocompetence handicap hypothesis may work in insects and suggest that JH, which is involved in the control of reproduction and morphogenesis, also plays a central role in the regulation of a trade–off between the immune system and sexual advertisement in insects.
Parasitism, predation and the evolution of animal personalities.
TLDR
It is asserted that inherent differences in host immune function can produce positive feedback loops between resource intake and compensation of parasitism's costs, thereby providing variation underlying the evolution of stable personalities.
Differing virulence of Aphanomyces astaci isolates and elevated resistance of noble crayfish Astacus astacus against crayfish plague.
TLDR
There are clear differences in virulence between different A. astaci genotypes and also differences invirulence within As-genotypes, and clear signs of increased resistance in different populations of noble crayfish towards some of the tested strains belonging to the As- Genotype of A. Astaci.
A behavioural syndrome in the field cricket Gryllus integer: intrasexual aggression is correlated with activity in a novel environment
TLDR
It is suggested that a behavioural syndrome exists in G. integer, in which more aggressive males are also more active in general, and possibly less cautious towards predation risk.
Hiding behaviour in two cricket populations that differ in predation pressure
TLDR
The results suggest that hiding times of male crickets in these populations have been shaped by natural selection acting through predation pressure.
Sexual ornamentation, androgens and papillomatosis in male roach (Rutilus rutilus)
TLDR
It is proposed that papilloma disease, which occurs during spawning, may contribute to the honesty of the signal of sexual ornamentation in roach, and suggest that male roach with high concentrations of circulating androgens express strongly secondary sexual characters, but may be at a high risk of papillomatosis.
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