Sex ratio among childhood cancers by single year of age

Mortality experiences among 15+ year survivors of childhood and adolescence cancers.

Sex-biased ratio of avoidant/ambivalent attachment in middle childhood

In this study, new evidence is presented of marked sex differences in the distribution of insecure attachment patterns in middle childhood. Attachment was assessed with the Manchester Child Attachment Story Task (MCAST) in a sample of 122 Italian 7-yearolds. The four-way distribution of attachment patterns was significantly unbalanced, with insecure boys more often avoidant (27%) than ambivalen...

Sex ratio at birth and age-reversed dominance among female Varecia.

Analysis of 283 offspring born at the Duke University Primate Center show that young female ruffed lemurs, Varecia variegata, produce significantly more daughters, whereas old mothers produce more sons than expected. Data are compared to 3 hypotheses for sex ratio bias: the Trivers-Willard hypothesis which predicts that dominant females produce more males, the local resource competition (LRC) h...

Age, growth, sex ratio and diet of eastern mosquitofish Gambusia holbrooki Girard, 1859 in Seyhan Dam Lake (Adana/Turkey)

The aim of this study is to provide necessary information on the biology of mosquitofish in Seyhan Dam Lake in Adana, which is located in southern part of Turkey. The population structure of eastern mosquitofish Gambusia holbrooki Girard, 1859 was studied in Seyhan Dam Lake. A total of 1582 specimens (772 males and 810 females) were collected monthly from January to December, 2007. The age comp...

Sex determination by the length ratio of metacarpals and phalanges: X-ray study on Iranian population

Background: In forensic anthropological identification, we usually use body remains. Accurate sex estimation from these remains is very important and needs the knowledge of specific population standards of that area. Sometimes, human remains are damaged by environmental circumstances. So, we must examine single bones for sex estimation. One of the relatively resistant bones to environmental con...