Intense intrasexual competition between males often results in the establishment of a dominance hierarchy, promoting differential access to females. Dominant males are expected to evolve more prudent sperm allocation strategies, whereas subordinate males are expected to counteract their mating disadvantage by increasing their sperm allocation. Burying beetles, insects that breed on small verteb...

OBJECTIVE To investigate associations of APOE, APOE promoter (G-219T), and tau protein exon 6 polymorphisms (47 and 53) and a history of self-reported concussion in college athletes. DESIGN Multi-center cross-sectional study. SETTING Male football and male and female soccer programs at the University of South Carolina, Jacksonville University, Benedict College, and the College of Charleston...

During the breeding season, male harbor seals (Phoca vitulina) make underwater acoustic displays using vocalizations known as roars. These roars have been shown to function in territory establishment in some breeding areas and have been hypothesized to be important for female choice, but the function of these sounds remains unresolved. This study consisted of a series of playback experiments in...

The purpose of this study was to test the utility of the 10% rule in hand rehabilitation. The 10% rule states that the dominant hand possesses a 10% greater grip strength than the nondominant hand. This rule has been used for many years to assist therapists in setting strength goals for patients with injured hands. The sample for this study consisted of 310 male and female students, faculty, an...

Background: Testicular Self Examination (TSE) is a process that examines the consistency and appearance of testis. It quick, painless takes just three minutes to perform for detecting testicular cancer (TC) in its early stages. significant public health problem, since incidence rates have steadily climbed globally in, making it most frequent men. Objectives: Assessing knowledge, attitude practi...

Background Educational attainment predicts late-life cognitive ability and dementia. Historically, women have had fewer educational opportunities than men. We examine if the association between level decline differ by gender. Method LifeAfter90 is an ongoing cohort of long-time members integrated healthcare delivery system ≥90 years old without a dementia diagnosis at recruitment. Interviews as...

We analysed variation at 14 nuclear microsatellite loci to assess the genetic structure, relatedness, and paternity of polygynous Jamaican fruit-eating bats. A total of 84 adults captured in two caves exhibited little genetic differentiation between caves (FST = 0.008). Average relatedness among adult females in 10 harem groups was very low (R = 0.014 +/- 0.011), providing no evidence of harem ...

The role of conformity to dominant U.S. masculine norms as an antecedent to help-seeking attitudes in men has been established using convenience samples made up largely of college-age and European American males. However, the role of conformity to masculine norms on help-seeking attitudes for noncollege-age men or for men from diverse backgrounds is not well understood. To fill this gap in the ...

In many social hierarchies, more subordinate individuals adjust their behaviour according to the presence or behaviour of more dominant individuals. In this study, it is shown that male mice form linear dominance hierarchies characterized by individuals attacking in bursts. Temporal pairwise-correlation analysis reveals that non-dominant individuals avoid behaving aggressively concurrently with...