This project is part of the PhD program for Ella Wilson supported by AgResearch Ltd.
Her PhD investigates how seasonal changes and reproductive state influence the internal physiological environment of red deer hinds. By measuring haematological markers (RBC, WBC, haemoglobin, haematocrit), key biochemical metabolites (BUN, SUN, NEFA, TAS), and endocrine hormones across multiple diel cycles, the study builds a high-resolution picture of how internal metabolism adjusts throughout the annual reproductive cycle. These biomarkers provide insight into shifts in energy balance, nitrogen utilisation, oxidative status, and immune function as animals transition from mating to pregnancy and into lactation.
The integration of endocrine rhythms—including melatonin, serotonin, leptin, ghrelin, and other hormones—reveals how photoperiod and physiological state jointly regulate behaviour, metabolism, and nutrient allocation. These findings aim to characterise the seasonal “metabolic signatures” of red deer and to identify physiological indicators that can support more responsive and sustainable management decisions within farm systems.
