Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 6 of 6 for “"Sheep reproduction"”.
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The effect of chorioptic mange (Chorioptes bovis) on ram fertility : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Veterinary Science at Massey University
Chorioptic mange of the scrotum was induced in 14 of 27 rams during a study of the effects of scrotal mange on ram fertility. Scrotal lesions varied from those of only a few sq. mm in size to those which covered virtually all of the scrotum in an inflammatory exudate which was up to 5 cm thick. …
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An analysis of lambing ewes three times in two years in Southland
This study examines the management and profitability of three lambings in two years under Southland conditions, and how they compare with those of a conventional Southland farming system. There has been little work done world wide but what overseas literature there is suggests that lambing ewes …
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Selection to improve spring fertility in a crossbred sheep population
… and productive performance of a composite sheep population, containing 50% Dorset, 25% Rambouillet and 25% Finn sheep breeding and under selection for ability to lamb in the fall, was evaluated. Traits considered were spring fertility, faIl litter size, live weights at birth, weaning, and …
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Genetic Analysis of Sheep Discrete Reproductive Traits Using Simulation and Field Data
… for the weaning weight at 120 d for Polypay sheep. Estimates of heritability and permanent environmental effects for litter size for these breeds ranged from .09 to .12 and .00 to .05, respectively. Heritabilities for grease fleece weight and fiber diameter were high for Targhee and Polypay …