Dive Behaviour of Belugas (<i>Delphinapterus leucas</i>) in the Shallow Waters of Western Hudson Bay
Bibliographic record
Abstract
Beluga diving was studied in western Hudson Bay, where the preferred habitat of this whale in summer is shallow coastal waters. No relationship was found between the duration of a dive and the surface interval either preceding or following it. During rare periods of intense diving, 77% of an average dive cycle was spent below the water surface. Only in waters deeper than 25 m did any whale spend more than half its time below the surface zone; in rivers, less than 15% of the time was spent at depths of 4 m or more. The frequency of long dives increased with water depth. Maximum dive duration was 15.6 min. Dives to depths of 25 m or less were of variable duration and time-depth profile; most dives exceeding 50 m had a square profile and reached the seabed. The easterly migration in early September took the whales into water deeper than 100 m for the first time in several months, and they dived frequently to the bottom during this period. No clear difference in dive capability was found between western Hudson Bay belugas and those that inhabit deeper waters farther north. The preference of this population for shallow water in summer is not dictated by an inability to dive to greater depths; belugas can utilize benthic resources throughout Hudson Bay.
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How this classification was reachedexpand
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 | 0.000 | 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 | 0.001 | 0.001 |
| 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 teacher head, 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".