Translocation heterozygosity and sex ratio in Viscum fischeri

Manifesting heterozygosity in sex-linked spastic paraplegia?

An unusual form of hereditary spastic paraplegia is described. Affected females have a late-onset slowly progressive spastic paraparesis. Affected males show oligophrenia with a rapidly progressive spastic quadriplegia. The mode of inheritance is consistent with sex-linkage, with partial manifestation in female carriers.

Modelling Sex Ratio and Numbers for Translocation in Meta-Population Management

The management of endangered species as metapopulations is becoming increasingly common. Diverse aspects of metapopulation dynamics and management have received attention in recent years. In particular, translocation of individuals between subpopulations of a metapopulation is practiced, or envisaged, for a variety of reasons and requires careful consideration. Linklater (2003) proposed that th...

Brith Sex Ratio and Pregnancy Outcomes after Bam Earthquake

Background and Objectives: Brith sex ratio could be affected by several factors such as stress due to natural disasters like earthquake. This study was performed to determine the sex ratio and the perinatal outcomes after Bam earthquake. Materials and Methods: This case-control study was designed in two sections for the evaluation of earthquake effects on brith sex ratio and the perinatal outc...

Sex-ratio evolution in sex changing animals.

Sex allocation theory is often able to make clear predictions about when individuals should facultatively adjust their offspring sex ratio (proportion male) in response to local conditions, but not the consequences for the overall population sex ratio. A notable exception to this is in sex changing organisms, where theory predicts that: (1) organisms should have a sex ratio biased toward the "f...

Sexuality: Sex Ratio and Sex Expression