Dynamic changes in flow rate and composition of urine during the post-bloodmeal diuresis in Aedes aegypti (L.)

摘要: 1. The urine of blood-fed mosquitos was collected and analyzed for elemental composition osmolality. 2. Peak rates flow averaged 4.9 droplets/min at 6 min following the beginning bloodmeal; peak contained, in mM, Na 178, K 4, Cl 132, approximately isosmotic to hemolymph. 3. As fell, [Na] decreased [K] increased. Urine osmolality declined, measuring less than 100 mOsm/kg some samples, as compared 354 measured pre-bloodmeal hemolymph. 4. When had fallen 10% rates, again became hemolymph, still containing principal cations. 5. Approximately 40% each water, contained plasma fraction bloodmeal excreted during 1–2h period bloodmeal. This excretion represents only 20–30% total loads ingested bloodmeal. 6. The data are consistent with dynamic changes functioning both Malpighian tubules hindgut post-bloodmeal diuresis.