Differences in weight gains caused by stable flies, Stomoxys calcitrans (L.), on grazing yearling steer/calves averaged 0.2 kg per steer in a 3-yr study on canyon range pastures in West Central Nebraska, Stable fly numbers averaged 0.85 per front leg on treated calves and 3.64 per front leg on control calves. In 2 of the 3 yr after the grazing trials were completed, the calves were placed in a ...

Transgenic mice possessing an ovine growth hormone gene were used to study the effects of elevated growth hormone on quantitative genetic variation. Males hemizygous for the transgene were mated to wild-type females to produce half- and full-sib families in which approximately half the progeny were transgenic and half were wild type. Analyses of body weights at 3-10 weeks, and weight gains from...

The results of these studies indicate that a high percentage of Nebraska range cattle are infected with gastrointestinal parasites, but at a subclinical level of infection. However, significant differences were not observed in average daily gain between thiabendazole-treated range cattle and unmedicated controls in three of four field trials. In the three trials the average improvement in daily...

PROTOZOOLOGY AND HELMINTHOLOGY. By L. R. S. Macfarlane, O.B.E., M.D., M.A., D.P.H. (Pp. vii + 251; figs. 61; plates 8. 35s.) Edinburgh and London: E. & S. Livingstone Ltd., 1960. TtiIs is a useful diagnostic manual. It presents basic information on the above subjects in condeiised form. It will prove most useful, as suggested by the author, to students preparing for the Diploma in Tropical Medi...

College students, especially females, gain weight their freshman year. Yet, what happens after this first year? This study’s purposes were to compare changes and rates of change in weight, body mass index (BMI), body composition (percent body fat, fat mass, fat free mass) and waist circumference between the freshman academic year and the following summer among female college students. Summer we...

Recently, the comparison of "periodized" strength training methods has been a focus of both exercise and sport science. Daily undulating periodization (DUP), using daily alterations in repetitions, has been developed and touted as a superior method of training, while block forms of programming for periodization have been questioned. Therefore, the purpose of this study is to compare block to DU...

Despite lack of agreement among specialists as to the ideal length of the breast-feeding period, it seems clear that most Chilean mothers have tended to keep that period very short. Various studies demonstrate ‘the point. For example, a 1968 study of 600 infants seen at both urban and rural health centers of the Northern Santiago Health Area reported that by two months of age 50% of these infan...

BACKGROUND Body mass index (BMI) is an established risk factor for colon cancer, but risks may differ between genders and colon subsites. Moreover, whether weight change influences risk is not yet clarified. We investigated these issues in a large, Norwegian, population-based cohort study. METHODS Participants' weight was measured at examinations up to three times between 1974 and 1988. Hazar...

Heifer development depends on nutritional management decisions throughout all growing phases. Optimizing costs to raise heifers improves profitability of dairy farms. Feed costs for heifers make up 50% of heifer costs. Required growth rates depend on the desired age at first calving and estimated mature body weight. Intensive milk feeding improves calf growth and subsequent milk production. Pre...