Factors driving Adélie penguin chick size, mass and condition at colonies of different sizes in the Southern Ross Sea Public Deposited

http://ir.library.oregonstate.edu/concern/articles/sb3979933

To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The published article is copyrighted by Inter-Research and can be found at:  http://www.int-res.com/journals/meps/meps-home/.

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Body size, mass and condition can affect an organism’s ability to cope with variation in resource availability or metabolic demand, particularly as juveniles reach independence. It follows that changes to parental provisioning efficiency (size and frequency of meals) through intraspecific competition or environmental conditions that affect prey availability may affect chick size, mass and condition and ultimately post-fledging survival. We examined how Adélie penguin chick size, mass and condition varied among colonies of different sizes on Ross Island during a 15 yr period of high environmental variability and varying intraspecific competition. Aiding the study was a natural experiment in which the presence of 2 giant icebergs midway through the study abnormally increased sea ice concentration (SIC), altering adults’ access to food. Concurrently, the colonies were rapidly increasing in size; based on previous work, this indicated increased trophic competition near colonies, a trend likely indicating a changing food web in the greater region. Results showed that increased amounts of sea ice, which reduced the ability of adults to access food, had a negative effect on the size and mass of chicks. However, a greater proportion of fish (vs. krill) in the diet had a positive effect on chick size. Moreover, in some cases, increased intraspecific competition may be a more important driver of provisioning rate and chick size than abiotic factors, with chicks showing the effects of reduced food delivery at larger colonies. Understanding these patterns will allow better understanding of how factors such as climate change and altered food webs may affect Adélie penguin populations.
Resource Type
DOI
Date Available
Date Issued
Citation
  • Whitehead, A. L., Lyver, P. O., Ballard, G., Barton, K., Karl, B. J., Dugger, K. M., ... & Ainley, D. G. (2015). Factors driving Adélie penguin chick size, mass and condition at colonies of different sizes in the Southern Ross Sea. Marine Ecology Progress Series, 523, 199-213. doi:10.3354/meps11130
Series
Keyword
Rights Statement
Funding Statement (additional comments about funding)
Publisher
Peer Reviewed
Language
Replaces
Additional Information
  • description.provenance : Submitted by Erin Clark (erin.clark@oregonstate.edu) on 2015-04-23T21:23:08Z No. of bitstreams: 1 DuggerKatieFisheriesWildlifeFactorsDrivingAdelie.pdf: 431388 bytes, checksum: 97f6bd6d1cea451b05ca6718a0169739 (MD5)
  • description.provenance : Made available in DSpace on 2015-04-23T21:23:22Z (GMT). No. of bitstreams: 1 DuggerKatieFisheriesWildlifeFactorsDrivingAdelie.pdf: 431388 bytes, checksum: 97f6bd6d1cea451b05ca6718a0169739 (MD5) Previous issue date: 2015-03-16
  • description.provenance : Approved for entry into archive by Erin Clark(erin.clark@oregonstate.edu) on 2015-04-23T21:23:22Z (GMT) No. of bitstreams: 1 DuggerKatieFisheriesWildlifeFactorsDrivingAdelie.pdf: 431388 bytes, checksum: 97f6bd6d1cea451b05ca6718a0169739 (MD5)

Relationships

In Administrative Set:
Last modified: 07/26/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items