Laboratory adaptation reduces female mating resistance in the sweet potato weevil

Kuriwada, Takashi; Kumano, Norikuni; Shiromoto, Keiko; Haraguchi, Dai

doi:10.1111/eea.12202

Cited by 4 publications

(2 citation statements)

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“…We found that adult males and females of the old colony had higher mating propensity (except for the experiment in groups in which only female origin significantly influenced mating propensity). Similar patterns have been reported in sweet potato weevil Cylas formicarius (Summers) (Coleoptera: Brentidae) by Kuriwada et al (2014), in which mass-reared females exhibited weaker resistance to male mating attempts when compared with females of a wild strain. These effects of domestication may be related to high rearing population density.…”

Section: Discussionsupporting

confidence: 78%

“…Similar patterns have been reported in sweet potato weevil Cylas formicarius (Summers) (Coleoptera: Brentidae) by Kuriwada et al . (2014), in which mass‐reared females exhibited weaker resistance to male mating attempts when compared with females of a wild strain. These effects of domestication may be related to high rearing population density.…”

Section: Discussionmentioning

confidence: 99%

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Domestication‐related changes in sexual performance of Queensland fruit fly

et al. 2020

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In Sterile Insect Technique (SIT) programs, massive numbers of insects are reared, sterilized, and released in the field to impede reproduction of pest populations. The domestication and rearing processes used to produce insects for SIT programs may have significant evolutionary impacts on life history and reproductive biology. We assessed the effects of domestication on sexual performance of laboratory reared Queensland fruit fly, Bactrocera tryoni, by comparing an old (49 generations) and a young colony (5 generations). We evaluated mating propensity, mating latency, copula duration, sperm transfer, and ability to induce sexual inhibition in mates. Overall, both males and females from the old colony had greater mating propensity than those from the young colony. Copula duration was longer when females were from the old colony. There was no evidence of sexual isolation between the colonies as males and females from the two colonies had similar propensity to mate with flies from either colony. Males from the old colony transferred more sperm regardless of which colony their mate was from. Finally, males from both colonies were similarly able to induce sexual inhibition in their mates and were also similarly able to secure copulations with already-mated females. Positive effects of domestication on sperm transfer, coupled with maintained ability to induce sexual inhibition in mates and to secure copulations with previously mated females, highlights that domestication may have little effect, or even positive effects, on some aspects of sexual performance that may advantage mass-reared B. tryoni in SIT programs.

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Section: Discussionsupporting

confidence: 78%

Section: Discussionmentioning

confidence: 99%

Domestication‐related changes in sexual performance of Queensland fruit fly

et al. 2020

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Female resistance and harmonic convergence influence male mating success in Aedes aegypti

Aldersley

Cator

2019

Sci Rep

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Despite the importance of mosquito mating biology to reproductive control strategies, a mechanistic understanding of individual mating interactions is currently lacking. Using synchronised high-speed video and audio recordings, we quantified behavioural and acoustic features of mating attempts between tethered female and free-flying male Aedes aegypti. In most couplings, males were actively displaced by female kicks in the early phases of the interaction, while flight cessation prior to adoption of the pre-copulatory mating pose also inhibited copulation. Successful males were kicked at a reduced rate and sustained paired contact-flight for longer than those that were rejected. We identified two distinct phases of acoustic interaction. Rapid frequency modulation of flight tones was observed in all interactions up to acceptance of the male. Harmonic convergence (wingbeat frequency matching) was detected more often in successful attempts, coinciding with the transition to stabilised paired flight and subsequent genital contact. Our findings provide a clearer understanding of the relationship between acoustic interactions and mating performance in mosquitoes, offering insights which may be used to target improvements in laboratory reared lines.

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