Bosu, W. T. K., et al. “Interrelationships Between Ambient Temperature, Postpartum Reproductive Events and Reproductive Performance in Dairy Cows: A Path Analysis”. Proceedings of the 13th World Congress on Diseases of Cattle, Durban, South Africa, September 17-21, 1984, vol. 2, Pretorian Veterinary Association, South Africa, 1984, pp. 787-95, https://scholar2.islandarchives.ca/islandora/object/ir%3Air-batch6-4283.

Genre

  • Conference Proceedings
Contributors
Author: Bosu, W. T. K.
Contributor: Proceedings of the 13th World Congress on Diseases of Cattle, Durban, South Africa, September 17-21, 1984
Author: Etherington, W. G.
Author: Martin, S. W.
Author: Dohoo, Ian R.
Date Issued
1984
Publisher
Pretorian Veterinary Association, South Africa
Place Published
Clinical Studies Department, Ontario Veterinary College, Guelph University, Guelph, Ontario, Canada N1G 2W1.
Durban, South Africa
Abstract

A path analytic approach was used to study data collected on 23 traits of 226 Holstein-Friesians in a commercial dairy herd during May 1981-Oct. 1982. Rectal palpation to assess uterine involution and ovarian activity was performed at 15, 24 and 28 days post partum, and blood samples were collected for progesterone assay. The results indicated, that during winter, there was an increase in the incidence of retained placenta and a delay in postpartum uterine involution. Cows calving in winter had prolonged service periods compared with cows calving in summer. Cows calving in summer began to cycle earlier in the postpartum period than did winter calvers, as indicated by increased plasma progesterone concentrations on days 24 and 28 post partum. 45% of the variation in service period was accounted for by variation in the other traits. A diagram of paths and their coefficients is given..

Note

SO: Proceedings-of-the-13th-World-Congress-on-Diseases-of-Cattle,-Durban,-South-Africa,-September-17-21,-1984-Volume-2. 1984; 787-795; CF: Proceedings of the 13th World Congress on Diseases of Cattle, Durban, South Africa, September 17-21, 1984. Volume 2.; RE: 15 ref.; SC: ZA; CA; VE; BE; 0A; 0I

Source type: Electronic(1)

Image removed. http://upei-resolver.asin-risa.ca?sid=SP:CABI&id=pmid:&id=&issn=&isbn=&volume=&issue=&spage=&pages=&date=1984&title=Proceedings%20of%20the%2013th%20World%20Congress%20on%20Diseases%20of%20Cattle%2c%20Durban%2c%20South%20Africa%2c%20September%2017%2021%2c%201984%20Volume%202&atitle=Interrelationships%20between%20ambient%20temperature%2c%20postpartum%20reproductive%20events%20and%20reproductive%20performance%20in%20dairy%20cows%3a%20a%20path%20analysis.&aulast=Etherington&pid=%3Cauthor%3EEtherington%2c%20W%20G%3bMartin%2c%20S%20W%3bDohoo%2c%20I%20R%3bBosu%2c%20W%20T%20K%3C%2Fauthor%3E%3CAN%3E19850187325%3C%2FAN%3E%3CDT%3EConference%20paper%3C%2FDT%3E

Language

  • English

Subjects

  • Seasons
  • female animals
  • service period
  • ruminants
  • Animal Reproduction and Development
  • animals
  • calving season
  • Uterus
  • puerperium
  • Placental retention
  • oestrus
  • Chordata
  • Artiodactyla
  • Bovidae
  • involution
  • postpartum interval
  • ungulates
  • mammals
  • vertebrates
  • cows
  • Bos
  • cattle
Page range
787-795
Host Title
Proceedings of the 13th World Congress on Diseases of Cattle, Durban, South Africa, September 17-21, 1984
Volume
2

Department