Hemolymph trehalose and carbohydrates in starved male adult Locust a migratoria: Possibility of endocrine modification

Abstract

1. 1. Starvation during a period from 1 to 6 days induced a strong decrease of total hemolymph carbohydrates in Locusta 25-day-old male adults. 2. 2. The trehalose concentration remained constant during the first fasting day, after which it dramatically decreased: trehalose is the most used sugar during starvation. 3. 3. Injections of saline CC extracts, during the fasting period, are always able to increase hemolymph carbohydrates, especially trehalose. The fourth-fasting-day insects have the highest reactions. 4. 4. The effects of injecting glucagon are comparable with those of CC extracts but are noticeable earlier.