Effect of fasting on the VO2-fh relationship in king penguins, Aptenodytes patagonicus
type: Dataset
description: King penguins (Aptenodytes patagonicus) may fast for up to 30 days during their breeding period. As such extended fasting may affect the relationship between the rate of O(2) consumption (Vo(2)) and heart rate (f(H)), five male king penguins were exercised at various speeds on repeated occasions during a fasting period of 24-31 days. In addition, Vo(2) and f(H) were measured in the same animals during rest in cold air and water (4 degrees C). Vo(2) and f(H) at rest and Vo(2) during exercise decreased with fasting. There was a significant relation between Vo(2) and f(H) (r(2) = 0.56) that was improved by including speed, body mass (M(b)), number of days fasting (t), and a cross term between f(H) and t (r(2) = 0.92). It was concluded that there was a significant change in the Vo(2)-f(H) relationship with fasting during exercise. As t is measurable in the field and was shown to be significant and, therefore, a practical covariate, a regression equation for use when birds are ashore was obtained by removing speed and M(b). When this equation was used, predicted Vo(2) was in good agreement with the observed data, with an overall error of 3.0%. There was no change in the Vo(2)-f(H) relationship in penguins at rest in water.
issued: 2026-05-19T16:26:06.492314
language: en
modified: 2026-05-19T16:26:06.492318
contact point: Organization
  fn: CCSD
keyword: algorithms
keyword: birds
keyword: body-weight
keyword: carbon-dioxide
keyword: exertion
keyword: fasting
keyword: heart-rate
keyword: infoeu-reposemanticsarticle
keyword: journal-articles
keyword: oxygen-consumption
keyword: respiratory-mechanics
keyword: sdvotlife-sciences-q-bioother-q-bioot
landing page: 0002-9513

Effect of fasting on the VO2-fh relationship in king penguins, Aptenodytes patagonicus
type: Distribution
format: HTML
issued: 2026-05-19T16:26:06.550372
modified: 2026-05-19T16:26:06.470134
access URL: https://hal.science/hal-00069538

test_moissonnage_selune
type: Agent