Browsing by Author "Beane, W. L."
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- Behavior-genetic analyses in Japanese quail chicksBenoff, Fred Harold (Virginia Tech, 1975-05-06)The investigation reported here involved an analysis of some of the biological factors affecting tonic immobility in young Japanese quail. Both duration and incidence of tonic immobility were measured on each bird at six days and again at 12 days of age. A significant line effect was found at both ages, and rankings of these lines for duration and incidence followed a similar pattern. Number of inductions and duration of immobility were inversely related, while the percentage incidence was positively associated with duration of immobility. A large maternal effect found at six days of age disappeared by 12 days of age. Additive genic effects were low to moderate which is indicative that tonic immobility is associated with fitness.
- Effects of various male feeding regimens on reproduction in broiler breedersFontana, Eddy Alejandro (Virginia Tech, 1988-07-15)A study was conducted using commercial broiler breeders with the males fed a diet containing, either 120/0 or 140/0 protein and body weight maintained at either 900/0 or 1000/0 of that recommended by the primary breeder (fed separately), or allowed to eat from the female feeders (controls). Female feeders in the separately fed pens were equipped with especially designed grills, which denied access to the males. The male feeder in these pens was elevated so that females were denied access. Males fed separately (body weight 90% or 1000/0, and dietary protein 120/0 or 140/0) had a significantly higher percentage fertility (4.20/0) than males allowed to eat with the females. No differences in percentage fertility were found among the four separately fed groups. No differences were noted in percentage hatch of fertile eggs among any of the treatment groups. Males eating from the female feeders had significantly heavier body weights and testes weights at 65 weeks of age than breeder males in the separately fed, groups. Mean body weights were 3819g and 4773g at 35 weeks of age, and 4192g and 5443g at 65 weeks of age for males eating separately and eating with the females, respectively. Furthermore, males in the control group had significantly larger breast angle measurements when compared with the separately fed males. No differences were observed in foot scores and semen concentration among males in the various treatment groups.
- Influence of feeder type and form of feed on the performance of broiler crossesBeane, W. L.; Siegel, Paul B.; Howes, C. E. (Virginia Agricultural Experiment Station, 1960-12)Both rate of growth and feed conversion were affected by a form of feed with crumbles giving better results than mash. A sex x form of feed was present for body weight with greater response to the crumbles obtained from the males than from females
- The influence of two light management systems on the growth and production of commercial layersSiegel, H. S.; Beane, W. L.; Howes, C. E. (Virginia Agricultural Experiment Station, 1961-09)The experiment described here was conducted to determine the effect of 2 increasing light schemes on various growth and production characteristics of 2 commercial egg laying strains