Hormones and feed intake
نویسندگان
چکیده
منابع مشابه
The relationship of body composition, feed intake, and metabolic hormones for broiler breeder females.
Three hundred twenty Cobb 500 broiler breeder pullets at 21 wk of age were selected from a flock fed according to Cobb Breeder Management Guide specifications. One hundred sixty pullets at 21 wk of age were switched to ad libitum feeding, and the remaining 160 pullets continued to be control-fed. The pullets were photostimulated at 22 wk and maintained until 36.5 wk. Plasma samples were obtaine...
متن کاملResidual Feed Intake and Feed Efficiency: Differences and Implications
In the beef production system, 70-75% of the total dietary energy is used for maintenance (Ferrell and Jenkins 1984; NRC 1996; Montaldo-Bermudez et al. 1990). Thus, while only 5% of the total life cycle dietary energy consumption is used for protein deposition in beef cattle, swine and poultry are more efficient at 14 and 22%, respectively. The relatively large size, slow maturity and slow repr...
متن کاملCASE STUDY: Feed Intake and Performance of Heifers Sired by High- or Low-Residual Feed Intake
The objective of this project was to investigate the effects of selecting sires for residual feed intake (RFI) on the performance of their daughters. Bulls with low or high estimated breeding values (EBV) for RFI were selected from the Angus Society of Australia sire summary and mated to Angus cross commercial cows at the Kansas State University Cow-Calf Unit in 2005 and 2006. The average EBV o...
متن کاملHow important is feed intake?
Over the past 10 to 15 years there have been very significant changes in pig performance due to selection. The result has been an increase in maximum protein deposition, a shift in the distribution of energy towards more protein and less lipid deposition, an increase in maintenance requirements and a decrease in voluntary feed intake (Knap, 2000). Using national UK data, Walters (2000) estimate...
متن کاملLactational Feed Intake and Sow Retention
John Deen, Sukumarannair S. Anil y Leena Anil*. 2006. Vo Congreso de Producción Porcina del Mercosur, Río Cuarto. *University of Minnesota. www.produccion-animal.com.ar Volver a: Vo Congreso In our analyses we are often driven by averages. It can be average daily gain, average daily feed intake, average temperature in the barn or even average weight of pigs. Yet it is the extremes in each of th...
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ژورنال
عنوان ژورنال: Proceedings of the Nutrition Society
سال: 1983
ISSN: 0029-6651,1475-2719
DOI: 10.1079/pns19830018