Sex- and age-specific rates of killing unrelated persons of one's own sex were computed for Canada (1974-1983), England/Wales (1977-1986), Chicago (1965-1981), and Detroit (1972) from census information and data archives of all homicides known to police. Patterns in relation to sex and age were virtually identical among the four samples, although the rates varied enormously (from 3.7 per millio...

Tissue auto-antibodies were investigated in fifty-one patients (twenty-five female, twenty-six male) receiving practolol for ischaemic heart disease or dysrhythmias and compared with those found in 204 patients (fifty-eight female, 146 male) with ischaemic heart disease who did not receive practolol. Antinuclear factor (ANF) was found in 24% female and 16% male patients receiving practolol, but...

Abstract In recent years, researc in subjective well-being has found several ecological factors that may underpin societal differences happiness. The adult sex ratio, the number of males relative to females an environment, influences many behaviours both humans and non-human animals. However, possible influence ratio on received little attention. I investigated relationship between over 29,000 ...

Sexual conflict theory suggests that female breeding success is strongly influenced by individual life history and environmental conditions and is much less affected by mate availability. Female mating failure due to a shortage of males remains poorly studied and understood. We present data on the effects of male availability on female breeding success in a wild colony of yellow ground squirrel...