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Full-Text Articles in Life Sciences
Conflict And Cooperation: Sociobiological Principles And The Behaviour Of Pigs, David Fraser, D. L. Kramer, E. A. Pajor, D. M. Weary
Conflict And Cooperation: Sociobiological Principles And The Behaviour Of Pigs, David Fraser, D. L. Kramer, E. A. Pajor, D. M. Weary
Sociobiology Collection
The pig provides many examples of how principles of behavioural ecology and sociobiology can lead to insights into farm animal behaviour. According to parent-offspring conflict theory, parents should tend to give a level of parental investment somewhat below that solicited by the young. When closely confined during lactation, sows can do little to limit the amount of contact with the piglets, and the young stimulate a prolonged, high level of lactation. Certain alternative housing systems allow the sow to limit the stimulation she receives, and the resulting reduction in lactation can actually be advantageous to both parties. Communal care of …
G95-1238 1995 Usda Sire Evaluation Changes, Jeffrey F. Keown
G95-1238 1995 Usda Sire Evaluation Changes, Jeffrey F. Keown
University of Nebraska-Lincoln Extension: Historical Materials
This publication discusses the 1995 USDA Sire Evaluation Report and its impact for dairy producers.
The January 1995 USDA Sire Evaluation Report incorporates changes that will not only increase the accuracy of prediction for cow and sire evaluations, but also includes a base change. Major changes included:
new Mature Equivalent Factors,
adjustments incorporated for days open,
and the genetic base year changed to 1990.
Let's discuss each change and look at how these changes will effect the 1995 proofs.
Brown· Midrib Sorghum Silage For Midlactation Dairy Cows, R. J. Grant, S. G. Haddad, K. J. Moore, Jeffrey F. Pedersen
Brown· Midrib Sorghum Silage For Midlactation Dairy Cows, R. J. Grant, S. G. Haddad, K. J. Moore, Jeffrey F. Pedersen
Department of Agronomy and Horticulture: Faculty Publications
Brown midrib sorghum silage was compared with alfalfa, corn, and normal sorghum silages for its effect on performance, ruminal metabolism, and digestive kinetics of Holstein dairy cows in midlactation. Twelve cows averaging 90 ± 5 DIM were assigned to one of four diets in replicated 4 X 4 Latin squares with 4-wk periods. Additionally, 3 ruminally fistulated cows (95 ± 20 DIM) were assigned to the same diets in a 3x 4 Youden square for measurement of ruminal characteristics. Diets were fed as isonitrogenous TMR that contained 65% silage (OM basis). The DMl was greater for the corn and brown …