English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/61972
Title: Plasma chemistry of the chinstrap penguin Pygoscelis antarctica during fasting periods: A case of poor adaptation to food deprivation?
Authors: Alonso-Álvarez, Carlos ; Ferrer, Miguel; Viñuela, Javier; Amat, Juan A.
Issue Date: 2003
Publisher: Springer
Citation: Polar Biology 26: 14- 19 (2003)
Abstract: The chinstrap penguin (Pygoscelis antarctica) is the smallest penguin species to be used to study the physiology of fasting. We analysed body-mass change and plasma chemistry of five non-breeding chinstraps during an experimental fasting period in the breeding season. We also analysed the same parameters in six fasting birds under natural conditions (during an incubation shift, which lasts about 10 days). Both groups presented similar patterns of change, showing a rapid increase in urea and uric acid plasma concentrations. Urea surpassed 3 mmol/l after 5 fasting days, while uric acid reached 1 mmol/l after 9 days. Plasma glucose levels decreased after 11 days, whereas cholesterol also showed a clear reduction during fasting. These results as a whole suggest that chinstrap penguins reached phase III after a short period in comparison with other Pygoscelis species. Body size and ecological factors could explain these inter-specific differences.
URI: http://hdl.handle.net/10261/61972
DOI: 10.1007/s00300-002-0439-y
Identifiers: doi: 10.1007/s00300-002-0439-y
issn: 0722-4060
Appears in Collections:(EBD) Artículos
Files in This Item:
File Description SizeFormat 
polar1.pdf276,76 kBAdobe PDFThumbnail
Show full item record

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.