Metabolic Water and Desiccation

  title={Metabolic Water and Desiccation},
  author={Kenneth Mellanby},
THE utilization by the body of ingested food substances and of tissue reserves yields among other things quantities of metabolic water. As the complete combustion of 100 gm. of fat produces about 110 gm. of metabolic water, whereas 100 gm. of carbohydrate yields only 55 gm. of water, fat reserves and fatty foods are believed to be particularly valuable as a protection against desiccation. This contention would appear to be supported by the fact that many animals which exist in deserts have… 
Studies on the water relations of adult locusts (orthoptera, acrididae). I. Respiration and the production of metabolic water
It is shown that the amount of biologically useful energy produced (in the form of ATP) remains the same, and that a shift from carbohydrate to fat metabolism requires the depletion of a smaller weight of food reserve.
Metabolic and Kidney Diseases in the Setting of Climate Change, Water Shortage, and Survival Factors.
A comparative physiologic approach is used to show that one of the primary mechanisms by which animals protect themselves against water shortage is to increase fat mass as a means for providing metabolic water.
Respiratory Physiology of Urban Insects
Temperature had a stronger effect on the mass specific V̇O2 of immatures than adults for both firebrats and silverfish, and Respiratory quotients showed complex relationships with temperature from 10-40°C, indicating a change in metabolic substrate with temperature.
Extreme water efficiency of Cape gannet Morus capensis chicks as an adaptation to water scarcity and heat stress in the breeding colony
It is proposed that maintaining low WEI is adaptive for Cape gannets because chicks need to balance water loss through evaporative cooling, fledglings need to overcome a period of up to a week when they cannot ingest any water and adults spend extended periods in the breeding colony during which water can become a limiting factor.
  • C. Jackson
  • Biology
    Biological reviews of the Cambridge Philosophical Society
  • 1949
1. The reproductive cycle of tsetse flies occupies a minimum of 55 or 56 days at 23o, made up of 12 days' ovarian development of the first egg (always in the right ovary), 3 or 4 days' embryonic
Mutagens and carcinogens in drinking water
It is highlighted that chlorination, as a water purifying treatment, does not guarantee an absolute absence of risk, and that some drinking-water pollutants have mutagenic and carcinogenic properties, giving an appreciable risk for the user.
Fluid Balance and Hydration for Human Performance
This chapter examines fluid balance for human performance, and concludes with recommendations to optimize fluid balance in recreational activities and sports.