The purpose of this research was to understand developmental patterns of intestinal glucose transport and its role in functional aspects of growth in turkeys. The objective of the first study was to examine developmental patterns of glucose transport in turkeys and to compare di…
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Three experiments were conducted to test different dietary concentrations and different sources of vitamin E (VE) to reevaluate the dietary requirement of VE for young turkeys, and to determine whether an early high dose of VE given either by subcutaneous injection or added to t…
High concentration of plasma prolactin (PRL) or hyperprolactinemia has long been associated with the expression of incubation behaviour in galliforme species. Incubation behaviour is selected against in commercial turkey production because this maternal behaviour reduces egg pro…
An experiment involving 96 turkeys was carried out in conventional battery cages. The purpose of this experiment was to determine the effect of lactose on the productive performance of turkeys. Another objective was to establish the optimum level of inclusion in the diet. Birds …
Chickens have been sexed on the basis of feather development at hatching for many years, but the slow feathering gene has only recently been incorporated into a commercial line of turkeys. The effect of increased nutrient density and age at photostimulation on BW, feather cover,…
During the first stage of this study, a complete statistical analysis was performed on condemnation records from 1991-1997 at the four main processing plants in Ontario. Results of this part of the investigation indicated that airsacculitis was responsible for 14-36.5 percent of…
Four experiments were conducted with broiler chicks and turkey poults to examine the possible interactions among fat-soluble vitamins. The first and the fourth experiments were conducted with L. W., Nicholas strain, poults and the second and the third experiments were conducted …
Turkey breeding stock consists of male-lines, which contribute the growth and carcass traits, and female lines, which contribute the reproductive traits. A negative relationship exists between increased body size and reproductive efficiency in turkeys. The influence of feed allo…
Two experiments were conducted to induce an immune stress in newly hatched turkeys by injection of lipopolysaccharide (LPS) and to study the effects of the induction of this early immune stress and changes in the nitrogen-corrected metabolizable energy (MEn) of the diet on growt…
Ninety large white turkey hens housed in individual cages were fed a 16 percent protein breeder diet during the first 10 weeks of egg production. At the start of the 11th week of egg production the hens were fed either (1) 16 percent protein, (2) 16 percent protein plus zinc bac…
Observations on domestic poults with wild turkey hens and various pilot experiments showed that: (1) the hen plays a minimal role in motivating/directing feeding and may indirectly inhibit some feeding behaviours; (2) bouts of feeding alternated with rest, suggesting post-hatch …
Enteric disorders are becoming of increasing concern to the poultry industry. The causative agents of enteric diseases in turkeys include bacteria, viruses, parasites and antinutritional factors present naturally in feedstuffs. There were two general objectives of research repor…
Semen quantity (volume) and quality (concentration, total number of sperm, percent of live sperm, total number of live sperm, and/or motility) were analyzed in male turkeys from 10 weeks of age to over one year of age in three experiments. The key variable in each of the three s…
Experiments were conducted to study the effects of selection and of genotype-environment (G x E) interactions on performance, behavior, and well-being of turkeys. The effects of selection were studied in lines of turkeys selected long-term for increased body weight (F line), inc…
Seven hundred and twenty female and 900 male day-old poults from three Large White turkey strains, Mile High 170 (MH-170), Nicholas (N) and Orlopp 61 (0-61), were used in two experiments conducted to study the influence of Ca and P regimen and strain on performance and bone meta…
The purpose of this study was to determine the effects of different light regimes on molting in growing turkeys and chickens. Two groups of Beltsville Small White turkeys were reared from 3 to 24 weeks of age under two extremes of artificial light; one group received 10 hours an…