Research - Avian Nutrition

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.

Teaching

• ANSC 315: Applied Animal Nutrition

Awards and Honors

• American Feed Industry 2007 Poultry Nutrition Research Award awarded at the Poultry Science Association Annual meeting
• National Chicken Council 2006 Broiler Research Award awarded at the Poultry Science Association Annual meeting
• Medal of Achievement award, Delmarva Poultry Industry, Inc., 2003.
• Membership Recognition Award for exceptional service to the American Ostrich Association, 1996.
• Poultry Science Graduate Student Research Manuscript Award, 1990.
• Iowa State University, Research Excellence Award, 1990.
• David R. Griffith Research Award presented by Iowa State University's Nutritional Sciences Council, 1990.
• Holco Award for Excellence in Research, Iowa State University, 1990.
• The International Award. Faculty Women's Club of Iowa State University of Science and Technology, 1989.
• Graduate Student Research Paper Certificate of Excellence, Poultry Science Association Annual Meeting, 1989.
• Sigma Xi, The Scientific Research Society Iowa State Chapter, 1989.
• Gamma Sigma Delta, Agricultural Honor Society, Iowa State Chapter, 1987.
• Iowa State University Research Excellence Award, 1987.

Other Accomplishments

• Obtained grant funding from federal, state, university, and industry sources (National Research Institute, USDA's Initiative for Future Agriculture and Food Systems, Delmarva Poultry Industry, Maryland Department of the Environment, American Ostrich Research Foundation, US Egg and Poultry Association, and specific industry support).
• Named to the National Academy of Science Committee on Animal Nutrition, 2001 to 2004.
• Associate Editor for the Metabolism and Nutrition Section of Poultry Science.
• Published 42 papers in refereed journals, 42 abstracts for presentations at national meetings, and 43 conference proceedings at national and international conferences, 5 book chapters.

Publications

Representative Publications

• 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.

Grants