The work done in R. Angel's lab melds applied and basic nutrition. The main focus is on maximizing nutrient availability from diets with the goal of reducing environmental impact as well as improving production efficiency and costs of production. The tools used for this work go from the very basic (epigenetics or nutritional imprinting, gene expression of transporters as well as specific genes that can be associated with changes seen, measures of nutrient absorption as well as intestinal enzyme, and gastrointestinal tract morphological changes) to the very applied (demonstration trials with industry to validate tools developed in the lab. Extensive work has been done and continues on minimizing the impact of poultry production on the environment, primarily as related to phosphorus and nitrogen. Work with phosphorus has focused on understanding requirements, improving absorption through management and diet (calcium/phosphorus ratios, use of enzymes and other feed additives) and implementation of new tools under commercial conditions. Work with nitrogen has focused on diet changes as well as post excretion changes to minimize nitrogen excretion and nitrogenous emissions to air. Another area of research is in exotic animals as it relates to developing adequate diets for captive animals as well as trying to solve some of the nutritionally related problems developed by exotic animals in captivity. The current focus is in nectivorous birds and incidence of iron storage disease.
ANSC 315: Applied Animal Nutrition
C.R. Angel, R.A. Dalloul, N.M. Tamin, T.A. Shellem, and J.A. Doerr. 1998. Performance and nutrient use in broilers fed a Lactobacillus - based pro-biotic. Poultry Sci. Suppl., (in-press).
Angel, C.R. 1996. Effect of environment on performance of growing ostriches. Proc. IST International Ratite Conference, pp. 78-79.Univ. Manchester, March 27-29.
Angel, C. Roselina. 1995. Ratite nutrition update. In: Alternate approaches to ratite production. Veterinary Continuing Education, Texas A&M University, Sep. 8-9, pp 60.
Angel, C. Roselina. 1994. Diet Effect on Egg Nutrients in a High Producing Ostrich. Association of Avian Veterinarians, 1994 Annual Conference, pp 121-126.
Angel, C. Roselina. 1993. Age Changes in Digestibility of Nutrients in Ostriches; Nutrient Profiles of Ostrich and Emu Eggs as Indicators of Nutritional Status of the Hen and Chick. Association of Avian Veterinarians, 1993 Annual Conference, pp 275-281.