Sex ratio manipulation in response to host size in the parasitoid

Proximal mechanisms of the sex ratio and clutch size responses of the wasp Nasonia vitripennis to parasitized hosts

Female Nasonia vitripennis lay fewer eggs and increase the proportion of male offspring when ovipositing in previously parasitized hosts compared to unparasitized hosts. This study examines the location and nature of the cues that females use in these clutch size and sex ratio decisions. Neither the sex ratio nor the clutch size response relies on chemical cues on, or a hole drilled in, the out...

Sex Ratio Manipulation by Parasitoid Wasps

Terms: parasitoid wasps, sex ratio, host size, local mate competition, host size model, host quality model, Waage's hypothesis, haplodiploid sex determination, differential mortality of the sexes, body size, development time, dispersal, behavioral constraints, sperm depletion, extrachromosomal factors, genetic variation, clutch size, methodological suggestions, assumptions of sex ratio models, ...

Sex-ratio Manipulation by the Parasitoid Wasp Muscidifurax Raptor in Response to Host Size.

Brood size and sex ratio in response to host quality and wasp traits in the gregarious parasitoid Oomyzus sokolowskii (Hymenoptera: Eulophidae)

This laboratory study investigated whether the larval-pupal parasitoid Oomyzus sokolowskii females adjust their brood size and sex ratio in response to body size and stage of Plutella xylostella larval hosts, as well as to their own body size and the order of oviposition. These factors were analyzed using multiple regression with simultaneous entry of them and their two-way interactions. Parasi...

تأثیر مدت زمان عدم دسترسی به تخم میزبان بر تولید تخم و نسبت جنسی زنبور پارازیتوئید Trichogramma brassicae Bezdenko (Hym.: Trichogrammatidae)

Fecundity and sex ratio are the important factors in the quality control of parasitoid, Trichogramma. In this research, the effect of the host egg deprivation on these factors in Trichogramma brassicae Bezdenko was evaluated. The experiment was conducted with four treatments, each in five replications in a completely randomized design. Twenty mated females (24 h old) were transferred into the g...