High growth and low corticosterone in food-supplemented Atlantic puffin Fratercula arctica chicks under poor foraging conditions
Bibliographic record
Abstract
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 565:217-226 (2017) - DOI: https://doi.org/10.3354/meps11999 High growth and low corticosterone in food-supplemented Atlantic puffin Fratercula arctica chicks under poor foraging conditions Michelle G. Fitzsimmons1,*, Megan E. Rector1, Donald W. McKay2, Anne E. Storey3 1Cognitive and Behavioural Ecology Graduate Program, Memorial University of Newfoundland, St. John's, NL A1B 3X7, Canada 2Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL A1B 3V6, Canada 3Departments of Psychology and Biology, Memorial University of Newfoundland, St. John's, NL A1B 3X9, Canada *Corresponding author: mgfitzsimmons@gmail.com ABSTRACT: Prey availability around seabird breeding colonies is often unpredictable, with prey fluctuating in both abundance and distribution. This study examined the effects of natural and experimentally altered food intake on growth and physiological condition in Atlantic puffin Fratercula arctica chicks during 3 breeding seasons. Previous studies have shown that food-supplemented chicks generally do not gain more mass than control chicks, because parents of food-supplemented chicks reduce their provisioning effort in response to the decreased food requirements of their offspring. In contrast, food-supplemented chicks in this study gained significantly more mass per day and had greater tarsus and wing growth than control chicks. Consistent with available information on capelin spawning, our results suggest that prey availability was generally so poor that parents could not reduce provisioning effort, even when extra food was provided. Corticosterone was significantly higher in control chicks compared with food-supplemented chicks, which is consistent with some, but not all, previous studies. Chicks had lower mass when prey availability was poor, but this was associated with high corticosterone levels only when weather conditions were also poor. These results suggest that measuring multiple fitness indices can be useful for determining overall environmental conditions and can provide insight into how puffins are adjusting to changes within their ecosystem. KEY WORDS: Atlantic puffins · Chick growth · Corticosterone · Foraging conditions · Supplemental feeding Full text in pdf format PreviousNextCite this article as: Fitzsimmons MG, Rector ME, McKay DW, Storey AE (2017) High growth and low corticosterone in food-supplemented Atlantic puffin Fratercula arctica chicks under poor foraging conditions. Mar Ecol Prog Ser 565:217-226. https://doi.org/10.3354/meps11999 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 565. Online publication date: February 17, 2017 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2017 Inter-Research.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".