Partial migration in the northern Gulf of St. Lawrence Atlantic cod population
Bibliographic record
Abstract
No abstracts are to be cited without prior reference to the author.The coexistence of resident and migratory individuals within a population is termed partial migration. Using data storage tags that record depth and temperature, we investigated the migratory behaviour of adult Atlantic cod in the northern Gulf of St. Lawrence. The geolocation problem was solved using the hidden Markov model based on daily maximum depths and bottom temperature. Reconstructed migration routes revealed undocumented partial migration in the panmictic population. Migratory individuals overwintered in relatively deep (300-500m) and warm (5°C) waters. In the spring, these migratory fish displayed extensive diel vertical movements that were interpreted as spawning behaviour. Resident individuals displayed a prolonged period of dormancy in shallow (< 50m) and near freezing (-1.5°C) coastal waters during the winter and the spring. This dormancy period was followed by foraging movements in western Newfoundland coastal waters. Limited ability of scientific survey to sample resident cod in shallow coastal waters may induce bias in the population abundance estimations.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| 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".