Gametocyte sex ratio of the malaria parasite Plasmodium mexicanum is variable in its host, the western fence lizard (Sceloporus occidentalis), both among infections and within infections over time. We sought to determine the effect of host physiological quality on the gametocyte sex ratio in experimentally induced infections of P. mexicanum. Adult male lizards were assigned to 4 treatment group...

We examined the role played by temperature in the duration of incubation and sex ratio of green turtle hatchlings at Ascension Island, one of the most important green turtle rookeries in the Atlantic. Temperature at control sites at nest depth and in 39 green turtle nests was measured using small temperature recording devices. The sex ratio of hatchlings was ascertained in a sub-sample of monit...

To date, researchers have shown that males are more likely to pirate software from the Internet than females (Hollinger, 1993; Hinduja, 2001, 2003). The purpose of this paper is to determine if low self-control or social learning theory can reduce the gender gap in software piracy. Using a nonrandom sample of college students, in four individual structural equation models, this study provides i...

Species exhibiting sex-role reversal provide an unusual perspective on the evolution of sex roles and sex differences. However, the proximate effects of sex-role reversal are largely unknown. Endocrine disruptors provide an experimental mechanism to address hormonal regulation of sexually dimorphic gene expression in sex-role-reversed taxa. Here, we investigate gene expression patterns in the l...

PURPOSE This study examined whether formal sex education is associated with sexual health behaviors and outcomes using recent nationally representative survey data. METHODS Data used were from 4,691 male and female individuals aged 15-24 years from the 2006-2008 National Survey of Family Growth. Weighted bivariate and multivariate analyses were conducted by gender, estimating the associations...

This paper examines how the editors and contributors to Christianity Today (CT) called for an evangelical sexual ethics in 1960s. Editors alike were concerned that supposed immorality on college campuses, liberalization of obscenity laws, approval sale birth control, secular sex education programs threatened United States’ social health. They believed evangelicals needed learn talk about sex, t...

backgrounds:there are some evidences that cholesterol can affect fish reproductive system. objectives: in this study the effect of high diet cholesterol on fish sex hormones and gonads weight was investigated. methods: a randomized experiment was conducted on 90 immature common carp. the fishes were divided into three groups with three replicates each (control, 0.5% cholesterol diet, and 1% cho...