A discussion of the distributional ecology of the Bufflehead (Bucephala albeola; Anatidae; Aves) based upon breeding biology studies in British Columbia
Bibliographic record
Abstract
This study discusses the breeding biology of the Bufflehead (Bucephala albeola; Anatidae, Aves), and examines factors operating upon the species during the breeding season to evaluate their effectiveness in setting limits to its breeding distribution. A definition of the breeding habitat utilized by the species is offered, with special attention being paid to the form and spatial relationships of the nest-hole. Precise details on nesting are presented and compared with those of related species. Factors which may affect the survival of young under varying conditions are examined critically for correlations with observed mortality. On the basis of these data it is suggested that climate is of major importance in limiting the breeding distribution of Bufflehead. Climate limits the distribution of trees, and thus of nest-sites, while luxuriant growth of shrubs in regions of high rainfall may limit the fraction of young reaching the water. Adverse weather may cause mortality both by causing chilling and by preventing small young from feeding. It is felt that further studies on waterfowl which involve relationships between nest-sites and territories might profitably use this species as a vehicle.
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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 | 0.002 | 0.003 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.004 | 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".