Sex Allocation: Size Matters for Red Spider Mites
نویسندگان
چکیده
Many animals can adjust the sex ratio of their offspring according to their parental ability to invest. In spider mites, larger eggs are likely to be fertilized and produce diploid females, whereas smaller eggs produce haploid males.
منابع مشابه
Evolution: Conflict by the Sexes, for the Sexes
A study in spider mites confirms predictions that males and females come into conflict over optimal sex allocation when local mate competition affects sex allocation in haplodiploid species.
متن کاملSex allocation in haplodiploids is mediated by egg size: evidence in the spider mite Tetranychus urticae Koch.
Haplodiploid species display extraordinary sex ratios. However, a differential investment in male and female offspring might also be achieved by a differential provisioning of eggs, as observed in birds and lizards. We investigated this hypothesis in the haplodiploid spider mite Tetranychus urticae, which displays highly female-biased sex ratios. We show that egg size significantly determines n...
متن کاملSex-ratio adjustment in response to local mate competition is achieved through an alteration of egg size in a haplodiploid spider mite.
Sex-ratio adjustments are commonly observed in haplodiploid species. However, the underlying proximate mechanisms remain elusive. We investigated these mechanisms in Tetranychus urticae, a haplodiploid spider mite known to adjust sex ratio in response to the level of local mate competition (LMC). In this species, egg size determines fertilization probability, with larger eggs being more likely ...
متن کاملFood stress causes sex-specific maternal effects in mites
Life history theory predicts that females should produce few large eggs under food stress and many small eggs when food is abundant. We tested this prediction in three female-biased size-dimorphic predatory mites feeding on herbivorous spider mite prey: Phytoseiulus persimilis, a specialized spider mite predator; Neoseiulus californicus, a generalist preferring spider mites; Amblyseius anderson...
متن کاملBIOLOGICAL CONTROL Seasonal Abundance of Spider Mites and Their Predators on Red Raspberry in Quebec, Canada
Seasonal abundance of spider mites and their predators on red raspberry was studied in 1993 and 1994 at 2 agricultural locations near Quebec City, Canada. Three raspberry systems, wild raspberry, pesticide-free cultivated raspberry, and commercial raspberry treated with a variety of pesticides, were sampled at frequent intervals. Tetranychus mcdanieli McGregor accounted for 87.5, 80.6, and 95.0...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Current Biology
دوره 20 شماره
صفحات -
تاریخ انتشار 2010