Onshore energetics in penguins: theory, estimation and ecological implications.

Published

Journal Article

Penguins are known to have high pedestrian locomotory costs in comparison to other cursorial birds, but the ecological consequences of this difference have received limited attention. Here we present a method for the accurate estimation of onshore energetics based on measurements of body mass, simple morphometrics and distance moved. The method is shown to be similarly accurate to other field-based estimates of energy expenditure, but has the advantage of logistical simplicity. King penguins spend 30-50% of their time ashore and may walk distances of several kilometres to and from their breeding colonies. However, in such cases the total energetic cost of pedestrian locomotion is estimated to be only 1.0% of the energy expended whilst ashore. Thus, despite a high instantaneous cost, pedestrian locomotion is a small and possibly negligible component of total energy turnover in king penguins.

Full Text

Duke Authors

Cited Authors

  • Halsey, LG; White, CR; Fahlman, A; Handrich, Y; Butler, PJ

Published Date

  • August 2007

Published In

Volume / Issue

  • 147 / 4

Start / End Page

  • 1009 - 1014

PubMed ID

  • 17467320

Pubmed Central ID

  • 17467320

Electronic International Standard Serial Number (EISSN)

  • 1531-4332

International Standard Serial Number (ISSN)

  • 1095-6433

Digital Object Identifier (DOI)

  • 10.1016/j.cbpa.2007.03.009

Language

  • eng