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Duncan MacKenzie is an Associate Professor Emeritus in the Department of Biology at Texas A&M University. He joined the faculty in 1983 and has focused his research on comparative endocrinology, specifically thyroid function and the mechanisms regulating hormone secretion in poikilothermic vertebrates. His laboratory examines how thyroid hormones influence fundamental physiological processes such as growth, nutrient utilization, and reproduction. He has discovered significant daily cycles of blood thyroxine levels in the red drum fish, suggesting a connection between the circadian rhythms and thyroid production. His current research explores the nutrient intake's effect on thyroid hormone secretion and the role of iodine transport in commercially important fish species. McKenzie's research spans a comparative perspective, including studies on reptiles and their thyroid hormone systems, aiming to enhance our understanding of the evolution of thyroid function. Through his research, he seeks to provide insights into the pituitary-thyroid axis, which could have implications for aquaculture production and endangered species conservation.
Department: Department of Communication and Journalism. Ph.D. program only currently admitting. GRE is test-optional.