Using Stable Isotope Techniques To Complement Existing Northern Pintail Management.
Bibliographic record
Abstract
The Northern Pintail (Anas acuta) is a waterfowl game species with North American population levels consistently below long-term management goals. Native habitat loss to agriculture likely reduced recruitment and limits population growth. My objective was to provide a proof-of-concept approach to using stable isotope ratios (δ2H, δ13C, δ15N) in feathers to infer spatial origins and habitat selection to complement existing pintail management. I found 46% of all sampled pintails had likely moult origins in the boreal biome, compared to 32% estimated by breeding population survey and 55% of recruitment of young took place in the northern boreal region of Canada. I determined the source of pintail harvest in eastern North America which included areas in Atlantic Canada and the mid-continent. Wildlife managers can use these findings to inform adaptive harvest management protocols and better represent the regional heterogeneity of population parameters such as recruitment related to origins as described by my results.
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.001 |
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".