منابع مشابه
Microvascularisation of the scrotal integument of Holstein-Friesian bulls.
Based on standard histological methods and specific injection technique, the study demonstrates for the first time the blood vessel system of the scrotal integument.The latter is relatively thin and shows a thick underlying fascia, the tunica dartos. The vessel networks found in both structures are somewhat different from each other, i.e., the former displays the typical integumental vessel sch...
متن کاملEvaluation of Semen Quality of Holstein Friesian and Jersey Bulls Maintained under Subtropical Environment
Received: August 31, 2009 Revised: October 05, 2009 Accepted: October 10, 2009
متن کاملScreening of Polish Holstein-Friesian bulls towards eradication of complex vertebral malformation (CVM) carriers.
The effectiveness of a program aimed at eradicating carriers of the recessive disorder Complex Vertebral Malformation (CVM) from the population of Holstein-Friesian bulls is reported. Among 1823 bulls, 1268 young and 555 proven bulls were examined. Three hundred and three bulls appeared to be CVM carriers (16.62%). The highest number of carriers occurred in the sons of a CVM sire, 55.51% and 61...
متن کاملBeef production potential of Norwegian Red and Holstein-Friesian bulls slaughtered at two ages.
There is a paucity of data on the beef production potential of Norwegian Red (NOR) compared with 'modern' Holstein-Friesian (HF) cattle. The present study used a total of 64 bulls in a 2 × 2 factorial design study encompassing two breeds (HF and NOR) and two slaughter ages (485; E, and 610; L, days). The mean initial age and live weight of the HF bulls were 179 (s.d. 47.1) days and 203 (s.d. 64...
متن کاملPrevalence of lameness and associated risk factors in Canadian Holstein-Friesian cows housed in freestall barns.
Lameness is a severe welfare problem and a production-limiting disease in dairy farming. The objectives of this study were to determine prevalence of lameness and investigate cow- and herd-level factors associated with lameness in dairy cows housed in freestall barns in 3 Canadian provinces. A purposive sample of 40 Holstein-Friesian cows was selected from each of 141 dairy farms in Québec, Ont...
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ژورنال
عنوان ژورنال: Canadian Journal of Animal Science
سال: 1983
ISSN: 0008-3984,1918-1825
DOI: 10.4141/cjas83-005