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Reproductive characteristics of two breeds of swine fed dichlorvos

Creator:: Trindade, Roger James
Abstract:: Thirty-six gilts were used in an experiment of 2³ factorial design. The experiment consisted of two breeds (Yorkshire- Berkshire and Yorkshire), two feeding regimens (pre-breeding and post-breeding) and two levels of dichlorvos (2, 2-dichlorovinyl dimethyl phosphate, 0 and 800 mg. per gilt per day). Pre-breeding treatment consisted of feeding dichlorvos...
Resource Type:: Masters Thesis
Full Text:: or Poland China gilts. A breed difference, however, did exist in number of follicles greater than 1

Management techniques for induction and synchronization of estrus in prepuberal gilts in confinement

Creator:: Schiemann, Calvin Aloysius
Abstract:: At weights of 81.5-90.5 kg, 187 prepuberal crossbred gilts were subjected to specific environmental stimuli, for up to 17 days, to determine which stimuli or combinations of various ones would initiate onset of estrus in prepuberal gilts. The stimuli used were: movement to new building, mixing or non-mixing of gilts,...
Resource Type:: Masters Thesis
Full Text:: in Chester White and Poland China gilts to range from 167 to 250 days with a mean of 201 days

Cycling and reproductive phenomena in gilts

Creator:: Knott, Robert Edward
Abstract:: Purebred Yorkshire gilts from a confinement managed herd were reared to test weights away from the sow and boar herd. Thirty-eight gilts weighing between 73 and 80 kilograms constituted group A gilts; 38 gilts weighing between 91 and 100 kilograms constituted group B gilts; and 47 gilts weighing 114 kilograms...
Resource Type:: Masters Thesis
Full Text:: : Redacted for privacy David C. England, Profa or of Animal Science Purebred Yorkshire gilts from a

The relationship of blood glucose levels to ovulation rate and early embryonic mortality in gilts

Creator:: Day, Paul E.
Abstract:: A study was made of blood glucose levels and their relationship to reproduction in gilts. Twelve blood samples, two in each of three successive weeks, before and after breeding were taken. Half of the samples were obtained from gilts in a fasting state and half after feeding. All samples were...
Resource Type:: Masters Thesis
Full Text:: . In a group of 37 Landrace x Poland gilts a highly significant positive association (r=. 406, P

Litter productivity at first and second parity by gilts mated at different weights at first or second estrus

Creator:: Tachasirinugune, Sommai
Abstract:: Purebred Yorkshire gilts with weights ranging from 70 to 105 kilograms were moved from a total-confinement rearing unit to a total-confinement brood stock unit where approximately ten gilts per pen were mixed to provide new penmates. Each gilt was thus exposed to an unfamiliar environment and to foreign penmates along...
Resource Type:: Masters Thesis
Full Text:: at puberty of Chester White and Poland China gilts were 210 days with a range of 167 to 250 days

Weights and nursing positions of pigs and milk production of individual under sections of sows

Creator:: Rose, Harvey Frederic
Resource Type:: Masters Thesis
Full Text:: weight, weaning weight, rnilk intake and udder nursing position one with the other. A significant

Criteria for selection and management in the swine breeding herd

Creator:: Page, Edward Bryce
Abstract:: Oregon State University swine herd records of four genetic groups were analyzed to determine: (1) the association of occurrence of a small litter (≤ 7) at birth with size of subsequent litters for gilts and sows, separately; (2) the effect of parity, genetic background and litter size on mean birth...
Resource Type:: Masters Thesis
Full Text:: association of occur- rence of a small litter (5- 7) at birth with size of subsequent litters for gilts and

Genetic and environmental influences upon litter size and variation of birth weights in Berkshire swine

Creator:: Chapman, Verne Merrill
Abstract:: Litter site and birth weight data compiled from the farrowing records of 275 litters out of 109 purebred Berkshire sows of the Oregon State University swine herd during the years 1953 to 1960 inclusive were used in this study. Genetic and environmental factors influencing four components of reproductive performance, namely,...
Resource Type:: Masters Thesis
Full Text:: their herd had a tendency to promote fetal membrane growth earlier in gestation than Poland China

The influence of heredity and some environmental components on occurrence of puberty in gilts in confinement

Creator:: Walker, Calvin
Abstract:: In a swine production and breeding experiment, Yorkshire gilts were evaluated for the influences of heredity-and some environmental components on occurrence of puberty in gilts in confinement. In the first experiment, 186 Yorkshire gilts reared and maintained in total confinement were used in a study to assess effects of several...
Resource Type:: Dissertation
Full Text:: . Grummer and A. B. Chapman. 1951. Age at puberty and related phenomena in outbred Chester White and Poland

The relationship of initial weight to growth rate in preweaning pigs

Creator:: Keeler, Joseph Lambert
Abstract:: Growth data compiled in this study were collected by using pigs farrowed during the fall, 1963 and spring, 1964 farrowing seasons of the Oregon State University swine herd. Thirty-seven trios of light-, medium- and heavy-birth-weight suckling pigs were used to determine the effect of birth weight on subsequent rate of...
Resource Type:: Masters Thesis
Full Text:: effect of birth weight on rate of gain under a laboratory environrnent and to cornpare the relative

ScholarsArchive@OSU

Reproductive characteristics of two breeds of swine fed dichlorvos

Management techniques for induction and synchronization of estrus in prepuberal gilts in confinement

Cycling and reproductive phenomena in gilts

The relationship of blood glucose levels to ovulation rate and early embryonic mortality in gilts

Litter productivity at first and second parity by gilts mated at different weights at first or second estrus

Weights and nursing positions of pigs and milk production of individual under sections of sows

Criteria for selection and management in the swine breeding herd

Genetic and environmental influences upon litter size and variation of birth weights in Berkshire swine

The influence of heredity and some environmental components on occurrence of puberty in gilts in confinement

The relationship of initial weight to growth rate in preweaning pigs

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