Gavin Shreeves

Learn More
The origin and maintenance of eusociality is a central problem in evolutionary biology. Eusocial groups contain individuals that forfeit their own reproduction in order to help others reproduce. In facultatively eusocial taxa, offspring can choose whether to found new nests or become helpers in their natal groups. In many facultatively eusocial insects,(More)
We explore the effects of group size on the direct reproductive success of subordinate helpers in eusocial animals where only a single, dominant individual reproduces at one time. Helpers can reproduce directly if they inherit dominance, but when dominance is age based, an individual born into a larger group has a longer wait to inherit. We show that this(More)
BACKGROUND The vascular disrupting agent combretastatin A4 phosphate (CA4P) causes major regression of animal tumours when given as combination therapy. METHODS Patients with advanced cancer refractory to standard therapy were treated with CA4P as a 10-min infusion, 20 h before carboplatin, paclitaxel, or paclitaxel, followed by carboplatin. RESULTS(More)
The diverse selection pressures driving the evolution of sexual size dimorphism (SSD) have long been debated. Whilst the balance between fecundity selection and sexual selection has received much attention, explanations based on sex-specific ecology have proven harder to test. In ectotherms, females are typically larger than males, and this is frequently(More)
27 28 The diverse selection pressures driving the evolution of sexual size 29 dimorphism (SSD) have long been debated. While the balance between 30 fecundity-and sexual selection has received much attention, explanations 31 based on sex-specific ecology have proven harder to test. In ectotherms, 32 females are typically larger than males, and this is(More)
  • 1