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Tb89: Motor And Elective Activity Of The Duodenum Of Broilers, C. Mba-Mezoui, F. H. Bird, C. B. Chawan
Tb89: Motor And Elective Activity Of The Duodenum Of Broilers, C. Mba-Mezoui, F. H. Bird, C. B. Chawan
Technical Bulletins
Recordings of pressure changes and electrical activity from the proximal small intestine of seven to eight-week-old unanesthetized chickens were made with chronically implanted transducers. The recordings were used to quantitate and determine the relationships among basic electric rhythm (BER), spike potentials (SP), and intestinal contractions (IC) of the duodenum. The omnipresence of the BER was demonstrated. SP were recorded whenever IC were detected. SP numbers and amplitudes were directly related to the strength of IC. Acetylcholine caused a general increase in the number and amplitude of both SP and IC. Epinephrine completely abolished both SP and IC. The results suggest …
B662: Costs And Returns On Maine Broiler Farms, Kenneth E. Wing, Frank D. Reed
B662: Costs And Returns On Maine Broiler Farms, Kenneth E. Wing, Frank D. Reed
Bulletins
This bulletin, in addition to presenting some statistical data on the growth and development of the broiler industry in Maine, includes the results of a survey made in 1967 of a representative sample of Maine contract broiler growers. A sample of 180 out of the approximately 900 broiler farms in Maine was surveyed during the summer of 1967 to obtain operating results for 1966. From this sample, 103 farms supplied information that was analyzed in this study. The average Maine broiler farm in 1966 had 20,913 square feet of floor space, which was unoccupied for an average of 65 days …
Tb8: Enzyme Levels In Birds, Lois S. Mcdaniel, Helen A. Dempsey, Harold L. Chute
Tb8: Enzyme Levels In Birds, Lois S. Mcdaniel, Helen A. Dempsey, Harold L. Chute
Technical Bulletins
This technical bulletin describes a research project relating to enzymes and chickens during health and disease. This project was started in 1957, and with the aid of a National Institutes of Health grant #C-4957 in 1959 the work was accelerated. This bulletin covers some of the work that has not been published and at also summarizes some of the literature relating to enzyme activity levels in birds.
Tb9: Newcastle Disease Virus Activity And Volume Of Amniotic Allantoic Fluid In Chicken Embryos From Flocks With Different Vaccination Histories, Harold L. Chute, D. C. O'Meara, D. B. Reardon, H. T. Wheelwright
Tb9: Newcastle Disease Virus Activity And Volume Of Amniotic Allantoic Fluid In Chicken Embryos From Flocks With Different Vaccination Histories, Harold L. Chute, D. C. O'Meara, D. B. Reardon, H. T. Wheelwright
Technical Bulletins
Breeding hens of similar age, 9 to 11 months old, were selected from four flocks, each with a different vaccination history. One flock received no vaccinations, the second received spray and wing web Newcastle disease (ND) vaccine, the third was given three ND dust vaccinations, and the fourth received two dead ND viral vaccinations.
B584: Controlling Infectious Bronchitis In Maine Chickens, Harold L. Chute, David C. O'Meara, J. Franklin Witter
B584: Controlling Infectious Bronchitis In Maine Chickens, Harold L. Chute, David C. O'Meara, J. Franklin Witter
Bulletins
This publication reports on the investigations of some of the respiratory disease problems of domestic chickens and steps taken to improve the vaccines created to prevent the diseases.
B571: Contract Broiler Growing In Maine, Richard F. Saunders
B571: Contract Broiler Growing In Maine, Richard F. Saunders
Bulletins
The Maine broiler industry had its beginning in the late 1920s and early 1930s with the greatest development occurring after World War II. Live poultry buyers, who later became processors, were the originators of the industry and have played the leading role in its development. Processing and broiler production along with hatching egg production and hatchery operations are vertically integrated to a relatively high degree in Maine. Broiler production in Maine has continued to increase at a more rapid rate than broiler production in the entire United States. By 1957 broiler production in Maine had reached 50 million birds which …