Journal article

Endocrine and metabolic responses to glucose, insulin, and adrenocorticotropin infusions in early-lactation dairy goats of high and low milk yield

F Zamuner, AWN Cameron, EK Carpenter, BJ Leury, K DiGiacomo

Journal of Dairy Science | Elsevier | Published : 2020

Abstract

This experiment aimed to examine endocrine and metabolic responses to glucose, insulin, and adrenocorticotropin (ACTH) infusions in early-lactation dairy goats of different levels of milk production (LMP). Goats were grouped as either high (HY; 4.0 L/d, n = 13) or low milk yield (LY; 2.4 L/d, n = 13). Individual milk yield (L/d) and dry matter intake (DMI; kg/d) were measured daily. Concentration (mM) of glucose, fatty acids, and β-hydroxybutyrate, percent of milk fat and protein, body weight (BW; kg), and body condition score (BCS) were assessed weekly (from 2–6 wk postpartum). An intravenous glucose tolerance test (IVGTT), an insulin tolerance test (ITT), and an ACTH stimulation test were ..

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Grants

Funding Acknowledgements

This research was supported by an Australian Government Research Training Program (RTP) Scholarship (Melbourne, VIC, Australia) awarded to Fernanda Zamuner. The authors gratefully acknowledge Meredith Dairy Ltd. (Meredith, VIC, Australia) personnel for their assistance throughout this study. The authors confirm that they do not have any conflicts of interest.