Egg size‐mediated sex allocation and mating‐regulated reproductive investment in a haplodiploid thrips species

  title={Egg size‐mediated sex allocation and mating‐regulated reproductive investment in a haplodiploid thrips species},
  author={Alihan Katlav and James M. Cook and Markus Riegler},
  journal={Functional Ecology},

There Is No Influence of Egg Size on Sex Allocation in Arrhenotokous Lineages of Thrips tabaci Lindeman

The results indicate that these two subspecies have different resource allocation strategies in response to maternal mating status, and raise intriguing questions regarding the evolutionary forces driving egg size and sex allocation in haplodiploids.

Common endosymbionts affect host fitness and sex allocation via egg size provisioning

Cardinium augmented female production by increasing maternal fitness and egg size, thereby boosting fertilization rate and offspring fitness and Wolbachia reduced the beneficial effects of Cardinium, demonstrating different invasion strategies and antagonistic effects of endosymbiotic bacteria on host fitness and evolution of sex allocation.

Intergenerational Effects of Early-Life Starvation on Life History, Consumption, and Transcriptome of a Holometabolous Insect

The findings reveal that parental starvation evokes complex intergenerational effects on offspring life history traits, consumption patterns, and gene expression, although the effects are less pronounced than those of offspring starvation.

Endosymbionts moderate constrained sex allocation in a haplodiploid thrips species in a temperature-sensitive way

It is indicated that endosymbionts affect sex ratios of haplodiploid hosts beyond the commonly recognised reproductive manipulations by causing female-biased sex allocation in a temperature-dependent fashion.

Constrained sex allocation after mating in a haplodiploid thrips species depends on maternal condition

It was found that constrained sex allocation only occurred in small females producing smaller eggs than large females producing larger eggs and female‐biased broods, and the bimodal sex allocation pattern correlates with maternal condition, and may have arisen in association with an egg size‐mediated fertilization mechanism recently detected in some haplodiploids.



Age-Specific Reproductive Investment and Offspring Performance in an Orb-web Spider, Argiope radon

An adaptive maternal reproductive investment strategy is suggested which allows the female spiders to gain maximum fitness in each reproductive bout and its consequences on the offspring emerging time and toleration to starvation are suggested.

A split sex ratio in solitary and social nests of a facultatively social bee

Data from 2502 offspring collected from naturally occurring nests across 6 years spanning the range of the M. genalis reproductive season show that despite significant yearly and seasonal variation, the offspring sex ratio of social nests is consistently more female biased than in solitary nests, suggesting that split sex ratios may facilitate the evolutionary origins of cooperation based on reproductive altruism via kin selection.

Variability in egg and jelly-coat size and their contribution to target size for spermatozoa: a review for the Echinodermata

Investigation of variation in egg volume and target area for spermatozoa provided by the jelly coat within and between three sea urchin species indicates that these traits are prone to maternal effects and may be influenced by factors such as sperm environment and offspring fitness that drive selection on egg investment.

Insect egg size and shape evolve with ecology, not developmental rate

This study challenges assumptions about the evolutionary constraints on egg morphology, suggesting that where eggs are laid, rather than universal mathematical allometric constants, underlies egg size and shape evolution.

Offspring sex ratio and development are determined by copulation activity in Echinothrips americanus MORGAN 1913 (Thysanoptera: Thripidae)

E. americanus seems to have a feedback system, that is offspring in low male‐biased populations develop faster and generate an adapted sex ratio, which means the assumption of a lower infestation risk in arrhenotokous than in thelytokous parthenogenesis should be reconsidered.

Sexual size dimorphism requires a corresponding sex difference in development time: a meta‐analysis in insects

The results indicate that the evolution and maintenance of high SSD values are rarely possible without a prolonged development of the larger sex, and the role of sex differences in growth rate as the ontogenetic determinant of SSD in insects requires further studies that should ideally be based on detailed monitoring of larval growth schedules.

The causes and consequences of constrained sex allocation in haplodiploid animals

The paper also contains a review of the factors leading to constrained oviposition in parasitic wasps and a discussion of how the percentage constrained Oviposition can be measured in natural populations.

Precise control of sex allocation in pseudo‐arrhenotokous phytoseiid mites

These questions are addressed by experiments with two species of pseudo‐arrhenotokous plant‐inhabiting predatory mites: Typhlodromus occidentalis Nesbitt and Phytoseiulus persimilis Athias‐Henriot.