Descriptive anatomy of the subcutaneous air diverticula in the Northern Gannet Morus bassanus
Bibliographic record
Abstract
Northern Gannets Morus bassanus typically forage by diving from high above the water surface. Their subcutaneous (s-c) tissues are invested by an elaborate system of air diverticula that presumably function in cushioning the impact of their entry into the water. The anatomical details of this system were studied by dissection and latex injection in 15 carcasses of these birds. The s-c air diverticula consist mainly of two independent systems of intercommunicating compartments that are bilaterally symmetrical, cover the ventral and lateral regions of the trunk and the proximal portions of the wings and legs, and communicate with the ipsilateral region of the clavicular respiratory air sac. This communication, which opens into the axillary region, is through a narrow gap between the subcoracoideus and coracobrachialis caudalis muscles. Two other, smaller, independent systems of s-c air diverticula, also bilaterally symmetrical, may contribute to cushioning the Northern Gannet’s body during its dives: one at the thoracic inlet, which communicates with the corresponding side of the clavicular air sac, and the other along the neck, which communicates with the nasal cavities and the choanal opening. Further work is required to define more precisely the function of these extensive air diverticula and air circulation within them.
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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 | 0.001 | 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".