Pressures produced when penguins pooh—calculations on avian defaecation

  title={Pressures produced when penguins pooh—calculations on avian defaecation},
  author={Victor Benno Meyer-Rochow and József Gál},
  journal={Polar Biology},
Chinstrap and Adélie penguins generate considerable pressures to propel their faeces away from the edge of the nest. [] Key Result With all of these parameters measured, we calculated that fully grown penguins generate pressures of around 10 kPa (77 mm Hg) to expel watery material and 60 kPa (450 mm Hg) to expel material of higher viscosity similar to that of olive oil. The forces involved, lying well above those known for humans, are high, but do not lead to an energetically wasteful turbulent flow. Whether…
Can Cephalopods Vomit? Hypothesis Based on a Review of Circumstantial Evidence and Preliminary Experimental Observations
How cephalopods may protect themselves against ingestion of toxic food by external chemodetection prior to ingestion and digestive gland detoxification post-ingestion is considered.
Complex fluids in animal survival strategies.
It is demonstrated with this review that rheology and material science might provide an interesting quantitative approach to study these biological materials in particular in context towards ethology and bio-mimicking material design.
Complex fluids in the animal kingdom
From the slimy defense of the notorious hagfish to the circus-like mating spectacle of leopard slugs, remarkable correlations within the flow behavior and biological purpose of biological complex fluids are unveiled.
ELEFANT: a user-friendly multipurpose geodynamics code
The code has purposely been designed to address geological flow problems in two and three dimensions at crustal and lithospheric scales and has the potential to model large scale high resolution thermo-mechanically coupled free surface flows.
NMML Acquisitions: January 2001
This list is for informational purposes only, indicating volumes currently in the NMML Library collection. This is a searchable PDF file. Press Ctrl+F and type the keyword you are searching for.
Who says you cannot get published?
  • P. McCrory
  • Education
    British journal of sports medicine
  • 2006
The Igs are intended to celebrate unusual and imaginative research and are awarded annually by the science humour magazine Annals of Improbable Research to make people think and laugh, and along the way it may spur people's interest in science, medicine, and technology.
Improving the administration of marine and coastal spaces
Animal Rheology_Manuscript_20200501
  • 2020


Do Seabird Gut Sizes and Mean Retention Times Reflect Adaptation to Diet and Foraging Method?
  • S. Jackson
  • Environmental Science
    Physiological Zoology
  • 1992
Gastrointestinal transit times of fish, squid, and crustaceans of known in vitro digestibility were measured for five seabird species to investigate the influence of natural diet and foraging method on mean retention time and Gut length appears to be the primary correlate of mean retention times.
Comparison of theory and experiment in peristaltic transport
Various theoretical aspects of peristaltic motion have attracted considerable attention in the recent literature. There also exists a difference of opinion concerning the definition of peristaltic
The Physiology of Man
The present chapter concludes with an account of the recent observations of Voit on the regeneration of the cerebral hemispheres after their ablation, which show that a large portion of these bodies may be reproduced, and that the organ may recover its functions to no very inconsidered extent.
Peristaltic transport of a power-law fluid with variable consistency.
Effects of the consistency variation on the peristaltic transport of a non-Newtonian power-law fluid through a tube have been investigated by taking into account the existence of a peripheral layer.
An Introduction to the Mechanics of Fluids
Preface.- General References.- Bodies, Configurations, and Motions.- Kinematics and Basic Laws.- Constitutive Equations, Reduced Constitutive Equations, and Internal Constraints.- Simple Fluids.-
Material values and mechanical behavior of nonmetals
  • 1955
Material values and mechanical behavior of non-metals
  • Schmidt E (ed) Numerical data and functional relationships in science and technology
  • 1955
Material values and mechanical behavior of non-metals. In: Schmidt E (ed) Numerical data and functional relationships in science and technology, vol IV/1
  • 1955
Review of Medical Physiology.
The digestive system.
  • N. Hightower
  • Biology, Medicine
    Annual review of physiology
  • 1962