Habitat use in Atlantic bluefin tuna Thunnus thynnus inferred from diving behavior
Why this work is in the frame
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Bibliographic record
Abstract
To examine habitat use in Atlantic bluefin tuna Thunnus thynnus, we used time series records from 20 archival tags and 7 pop-up satellite archival tags. Daily vertical profiles were classified into 3 dive types: (1) profiles restricted to surface waters by either bathymetry or thermal constraints; (2) profiles with frequent V-shaped dives that may be associated with transiting or searching behaviors; and (3) U-shaped profiles associated with putative foraging behavior. Fixed kernel probability contours were calculated for each of the dive profile classes. Key potential North Atlantic foraging habitats were identified in the NW Atlantic (Gulf of Maine/Scotian Shelf, Grand Banks and Flemish Cap), off Florida and the Bahamas and in the NE Atlantic. These 'hotspot' regions encompass areas of high seas that may be important to future conservation and management of the species. U-shaped dive profiles were shallower and surface returns were more frequent in areas where subsurface temperatures were coldest. The presence of Atlantic bluefin tuna coincided with peak productivity and sea surface temperatures in 3 of the 5 hotspot areas. Further analyses examined spatial and temporal patterns of transatlantic migrations and deep diving behavior in the Strait of Gibraltar.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 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 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.022 | 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 it