Zobrazeno 1 - 8 of 8 pro vyhledávání: '"J H Dunne"'
1
Sources of inefficiency at mating in pigs - an appraisal
Autor: C V Rikard-Bell, P R English, J H Dunne, O MacPherson, J A Roden, F M Davidson, R Bamlett
Publikováno v: Proceedings of the British Society of Animal Production (1972). 1993:132-132
Mating is one of the most critical processes influencing the success of any breeding pig enterprise since the efficiency of this process establishes the potential output of pigs. A study was conducted on 100 recently weaned sows during the mating pro
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e39e32b3d84442b869d5633e4a0c47ee
https://doi.org/10.1017/s0308229600024582
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2
A Study of the timing and duration of oestrus in sows post-weaning and of problems at mating
Autor: null Huang, null Wen-Yu, J Behan, L Beveridge, C Rodrigo, J H Dunne, J S M Hutchinson, O Macpherson, J A Roden, P R English
Publikováno v: Proceedings of the British Society of Animal Production (1972). 1992:128-128
General recommendations are made (e.g. Gomes, 1977; Dzuik, 1970) that, in order to achieve maximum conception rate and litter size, sows should be mated or inseminated 9 to 15 hours prior to ovulation and that this coincides with an interval of 30 to
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::12cbfcd83187dba827e35babb9ffd5be
https://doi.org/10.1017/s030822960002239x
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3
Factors affecting the response of working boars to changing environmental temperature
Autor: Angela H Cliff, J H Dunne, P R English, J S M Hutchinson, O Macpherson
Publikováno v: Proceedings of the British Society of Animal Production (1972). 1991:140-140
It is well established that high environmental temperature can have adverse effects on sperm concentration and the normality of sperm in the boar. Induced abnormalities include reduced motility, abnormal heads, proximal droplets, coiled and bent tail
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::475938c86399f4c9d1426de52ce7e28f
https://doi.org/10.1017/s0308229600020900
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4
Evaluation of the behaviour of mature boars housed in groups of four
Autor: null Jose Cordoba-Dominguez, J H Dunne, A H Cliff, O Macpherson, C M Menaya, J M A Vidal, P R English
Publikováno v: Proceedings of the British Society of Animal Production (1972). 1991:65-65
It is traditional in the British Isles to house the working boar as an individual and this practice was the sensible policy when breeding pig herds were small and replacement boars were purchased singly. However in large herds today several boars are
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::287f54911f35f72a3206d9f99921dde0
https://doi.org/10.1017/s0308229600020158
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5
A Critical Evaluation of Culling Policy in a Commercial Herd of Sows
Autor: J H Dunne, P R English, O MacPherson, J A Roden, R C Segundo
Publikováno v: Proceedings of the British Society of Animal Production (1972). 1990:96-96
Pig producers must continuously strive for improved productivity and efficiency in order to remain competitive. The effect of sow culling rate on overall herd productivity is well documented in the scientific literature (Kroes and Van Male 1979, Dago
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5c1eeb8a05dba564c87b6fa8ed817cc4
https://doi.org/10.1017/s0308229600018778
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