The speed and metabolic cost of digesting a blood meal depends on temperature in a major disease vector.

摘要: The energetics of processing a meal is crucial for understanding energy budgets animals in the wild. Given that digestion and its associated costs may be dependent on environmental conditions, it necessary to obtain better these under diverse conditions identify resulting behavioural or physiological trade-offs. This study examines speed metabolic - cumulative, absolute relative energetic terms bloodmeal major zoonotic disease vector, tsetse fly Glossina brevipalpis, across range ecologically relevant temperatures (25, 30 35°C). Respirometry showed flies used less digesting meals faster at higher but their starvation tolerance was reduced, supporting prediction warmer are optimal while cooler should preferred unfed post-absorptive flies. (13)C-Breath testing revealed oxidized dietary glucose amino acids within first couple hours feeding overall more nutrients temperatures, premise because they maximize minimize costs. An independent test predictions using thermal gradient confirmed recently fed selected then as became post-absorptive, presumably resistance. Collectively results suggest there least two optima given population any time switch dynamically between throughout cycles.