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

James Williams, Henry H. Hagedorn, Klaus W. Beyenbach

Research output: Contribution to journalArticle

91 Citations (Scopus)

Abstract

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

Original languageEnglish (US)
Pages (from-to)257-265
Number of pages9
JournalJournal of Comparative Physiology B
Volume153
Issue number2
DOIs
StatePublished - Jun 1983
Externally publishedYes

Fingerprint

diuresis
Aedes
Diuresis
Aedes aegypti
urine
Flow rate
Urine
Chemical analysis
Hemolymph
hemolymph
Cations
Blood
peak flow
osmolality
Plasmas
Osmolar Concentration
Water
Malpighian Tubules
rate
Malpighian tubules

ASJC Scopus subject areas

  • Physiology (medical)
  • Environmental Science(all)
  • Physiology
  • Animal Science and Zoology

Cite this

Dynamic changes in flow rate and composition of urine during the post-bloodmeal diuresis in Aedes aegypti (L.). / Williams, James; Hagedorn, Henry H.; Beyenbach, Klaus W.

In: Journal of Comparative Physiology B, Vol. 153, No. 2, 06.1983, p. 257-265.

Research output: Contribution to journalArticle

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

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