OUP accepted manuscript
Bibliographic record
Abstract
Fisheries management requires a thorough understanding of the processes involved in reproduction, including the ability to distinguish sexually mature individuals. The Jonah crab, Cancer borealisStimpson, 1859, occurs from Newfoundland to Florida, but the fishery is concentrated in New England. The crab contributes to a significant and growing male-driven fishery; however, little is known about its life history. We investigated the relationship between morphometrics and physiological maturity, and the size at which these life changes occur in the southern New England stock. The size at 50% sexual maturity (SM50) in male C. borealis was estimated morphometrically to be 105.9 mm carapace width (CW). This size is larger than the estimate of 98.3 mm CW for the species in the Mid-Atlantic Bight but lower than the estimate of 127.6 on the Scotian Shelf, consistent with a poleward gradient in size at maturity. The gonadosomatic index differs significantly between CW size groups, maturity status, and season whereas spermatophore size was not related to CW. Fisheries management should include multiple measures of sexual maturity and consider factors including geographical distribution when establishing and assessing guidelines for this economically important species.
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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 | 0.001 | 0.004 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.006 | 0.002 |
| Open science | 0.002 | 0.005 |
| Research integrity | 0.003 | 0.002 |
| Insufficient payload (model declined to judge) | 0.859 | 0.816 |
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; the direct Gemma label and the distilled Codex classifier agree on what is shown here.
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".