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The ecological processes underlying locust swarm formation are poorly understood. Locust species exhibit phenotypic plasticity in numerous morphological, physiological and behavioural traits as their population density increases. These density-dependent changes are commonly assumed to be adaptations for migration under heterogeneous environmental(More)
1. Glycogen levels and the production of metabolic end products by the fresh water bivalveAnodonta cygena were determined under aerobic and anaerobic conditions. 2. The glycogen content accounts for 5–14% of the dry weight. After 30 hours of aerobic or anaerobic incubation no significant glycogen breakdown could be observed. 3. L-lactate and alanine seem to(More)
A hypertrehalosaemic neuropeptide from the corpora cardiaca of the blowfly Phormia terraenovae has been isolated by reversed-phase h.p.l.c., and its primary structure was determined by pulsed-liquid phase sequencing employing Edman chemistry after enzymically deblocking the N-terminal pyroglutamate residue. The C-terminus was also blocked, as indicated by(More)
1. The carbohydrate metabolism of the larvae ofChironomus thummi was investigated during periods of experimental anaerobiosis. 2. 600 to 700 μmoles of glycogen/g d.w. were utilized during 48 h of anaerobiosis while about 100 μmoles/g d.w. were used under aerobic conditions. Maximum rates of glycogenolysis occurred during the first 12 h of anaerobiosis. 3.(More)
The age-dependent variations in the amount of food ingestion, egg production, and flight activity of protein-fed female Phormia terrae novae were analyzed. Also the influence of mating and forced physical performance on the time course of these parameters and on life span were tested. In virgin females, the life span with the investigated factors is(More)
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