sexual dimorphism
- Early-life hypoxia alters adult physiology and reduces stress resistance and lifespan in Drosophila
Summary: Early-life hypoxia exposure in Drosophila leads to a subsequent change in adult physiology that is associated with reduced stress tolerance and shortened lifespan.
- Complex multi-modal sensory integration and context specificity in colour preferences of a pierid butterfly
Summary: Cross-modal integration of information negatively affects colour learning in a butterfly.
- Sex-specific molecular specialization and activity rhythm-dependent gene expression in honey bee antennae
Summary: Gene expression differences between honey bee male (specialist) and female (generalist) antennae identify differences in molecular specialization and reveal new genes involved in odorant detection.
- Variation in sexual brain size dimorphism over the breeding cycle in the three-spined stickleback
Summary: Sex-specific changes in brain size over the breeding cycle in the three-spined stickleback may be the reason for varying estimates of sexual brain size dimorphism across studies of this species.
- Linking developmental diet to adult foraging choice in Drosophila melanogaster
Summary: Drosophila melanogaster shows sexual dimorphism in the effect of developmental diet on adult foraging choice, and life-stage dependency of the effects of diet on lifespan.
- The effect of air resistance on the jump performance of a small parasitoid wasp, Anagyrus pseudococci (Encyrtidae)
Summary: In a small sexually dimorphic parasitoid wasp, smaller males pay a higher penalty of air resistance during take-off jumps. Nevertheless, both sexes achieve outstanding jump heights compared with their body size.
- Nutrient intake determines post-maturity molting in the golden orb-web spider Nephila pilipes (Araneae: Araneidae)
Summary: Nutrition determines post-maturity molting (PMM) in the orb-web spider Nephila pilipes, suggesting PMM may have evolved as an adaptation to diverse foraging conditions during range expansion.
- Contrasting effects of increased yolk testosterone content on development and oxidative status in gull embryos
Summary: Increased yolk testosterone concentration in yellow-legged gulls promotes body mass growth of embryos but reduces brain size. Moreover, sex differences in brain size exist among control embryos.
- Testosterone activates sexual dimorphism including male-typical carotenoid but not melanin plumage pigmentation in a female bird
Highlighted Article: Female red-backed fairy-wrens express male-typical traits in response to exogenous and endogenous testosterone, including carotenoid-pigmented plumage, darkened bill and an enlarged sperm storage organ, but are constrained in production of melanin-pigmented plumage.