DNA sequence analysis of a North Pacific humpback whale (<i>Megaptera novaeangliae</i>) placenta
Bibliographic record
Abstract
Whales residing in their natural, noncaptive environments present a particular challenge to the direct observation of parturition and the subsequent analysis of afterbirth tissues. For many years the research community has believed that the Hawaiian Islands serve as one of the winter calving grounds for the North Pacific humpback whale, Megaptera novaeangliae. Direct evidence, however, had not been reported. In 1997 the analysis of a large placenta encountered in the Hawaiian winter grounds of the humpback whale was documented but definitive identification of the source species was not possible. In this report we describe the DNA sequence analysis, by polymerase chain reaction, which was performed on the tissue obtained from that placenta to identify its source. It was concluded from the analysis that the unknown placental tissue originated from a humpback whale. These results have important implications concerning humpback whale reproduction, since this molecular confirmation serves as direct evidence of a humpback whale birth in the Hawaiian winter grounds.
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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) | 0.001 | 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".