Exploring the Strategies of First Migration in the Subarctic-Nesting Shorebird, Calidris Alpina Hudsonia
Bibliographic record
Abstract
Compared with adult conspecifics, juvenile Dunlin undertaking their first migrations experience higher rates of mortality. Despite the significant impact of juveniles shorebirds on population dynamics, little is known about young birds' maiden migrations. For the first time, we present the migratory strategies of juvenile Dunlin (Calidris alpina hudsonia) during their inaugural journeys to non-breeding grounds using the Motus radio telemetry network. We analyze the migrations of adult Dunlin tracked via the Motus system, and compare strategies between age groups. Juveniles preferentially over-wintered in discrete sections of the Eastern Seaboard – sites exclusive to this age demographic. We also elucidate vital juvenile staging sites in Southeastern Ontario, and potential mortality hotspots within Ontario and Nova Scotia. We postulate genetic influences on the migrations of juveniles. Three novel non-breeding sites of adults were documented, in Colombia, Alaska, and Indiana. We also emphasize the ecological importance of select stopover sites along the Atlantic USA.
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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) | 0.002 | 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".