Thesis (Ph. D.)--University of Wisconsin--Madison, 1965. / Typescript. Vita. Description based on print version record. Includes bibliographical references (leaves 69-70).

Thesis (Ph. D.)--University of Wisconsin--Madison, 1981. / Typescript. Vita. Description based on print version record. Includes bibliographical references (leaves 64-78).

Thesis (M.S.)--University of Wisconsin--Madison, 1966. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Thesis (M.S.)--University of Wisconsin--Madison, 1971. / Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

A series of four feeding tests, involving a total of 610 poults, was conducted to study fish meal and dried brewers' yeast as sources of unidentified factors required by turkey poults for maximum growth. A corn-soybean oil meal ration, supplemented with all known vitamins, was used as a basal ration. Wheat was substituted for corn in two tests. The poults were reared in batteries on wire screen floors for the duration of each test. The addition of 5 per cent fish meal to the all-vegetable ration resulted in an increase in the rate of growth of poults. Since the basal ration contained all the known vitamins, it was apparent that fish meal contained an unidentified factor(s) required by poults for maximum growth. The degree of response to fish meal varied in the different tests. It is suggested that the variation may have been due to a carry-over of the unidentified factor(s) from the parent stock, which varied with the different lots of poults used in the tests. The addition of 5 per cent dried brewers' yeast to the all-vegetable basal ration failed to produce a growth response in poults. This would indicate that the unidentified factor(s), postulated to be present iii dried brewers' yeast, was not required by the poults under the conditions of this experiment, nor was it supplied otherwise by some other ingredient in the ration. The unidentified factor(s) demonstrated to be present in fish meal did not appear to be present in dried brewers' yeast. Supplementation of various rations with an antibiotic preparation containing aureomycin resulted in an increase in the average weights of the male poults, but failed to produce an increase in the average weights of the female poults. The degree of response to aureomycin obtained in the male poults appeared to depend, in part, on the composition of the ration fed. The efficiency of feed utilization was improved slightly when aureomycin was included in the ration. There was no significant difference between the weights of the poults receiving wheat and those fed corn as the cereal part of the diet, although the efficiency of feed utilization was slightly better with the corn rations. The requirement of the poult for an unidentified growth factor present in fish meal has been demonstrated with rations containing either wheat or corn. / Land and Food Systems, Faculty of / Graduate

The concentration of glycolytic intermediates and co-factors in and pH values of P. superficlalis muscles from each of five 15 week-old and five 25 week-old White Cannon torn turkeys was measured at varying times between 0 and 180 min. post-mortem. Different rates of post-mortem glycolysis were evident among birds, independent of age. On the basis of ATP catabolism, pH and lactic acid accumulation, two groups categorized as "fast-" and "slow-glycolyzing" were evident. The different rates of glycolysis could not be explained by qualitative or quantitative differences in control of the glycolytic flux. The patterns of change in concentration of intermediates and co-factors expressed as mass action ratios suggested that regardless of glycolytic rate, post-mortem glycolysis in turkey breast muscle is susceptible to control at the reactions catalyzed by hexokinase, phosphofructo kinase, aldolase and triosephosphate isomerase, glyceraldehyde phosphate dehydrogenase and phosphoglycerokinase and pyruvate kinase. P. superficialis muscles from six 19 and six 27 week-old White Cannon torn turkeys were analyzed for ATP concentration at "0" and "60" min. post-mortem and muscle pH was determined during a three hour post-mortem period. The time required for excised muscle strips to achieve maximum contraction was determined by periodic measurement of strip length. Analysis of the data indicated a relationship between rate of ATP catabolism and time to maximum contraction. "Slow-" and "fast-glycolyzing" groups were evident and were independent of age. The "slow-glycolyzing" group had a higher initial ATP concentration, a larger proportion of initial ATP remaining at 60 min. and required a longer time for the muscle strips to achieve maximum contraction. / Land and Food Systems, Faculty of / Graduate

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An important theme of wildlife ecology is understanding how animals move through their landscapes and inferring the strategies of resource acquisition. Eastern wild turkeys (Meleagris gallapavo silvestris) are a model species for evaluating the responses of movements and habitat selection to spatiotemporal variability of resources. I hypothesized that scales of area-restricted search (ARS) would change with variation in the landscape. I identified the ARS locations of high first passage time values using segmentation algorithms and hidden Markov models, and evaluated spatial variations in habitat selection for foraging-like activities of wild turkeys using Dirichlet multinomial models. The ARS scale for daily movement paths did not change over time substantially. Wild turkeys placed home ranges in heterogeneous landscapes to maximize forage availability. However, continuous-time Markov chain models demonstrated that habitat selection varied between individuals indicating that fine-scale selection may depend on the local resource availability and status of individuals.

No description available.