Blue Crab Spawning and Recruitment in Two Gulf Coast and Two Atlantic Estuaries in Florida
Bibliographic record
Abstract
Abstract The present study aimed to investigate the life history traits of blue crabs Callinectes sapidus found in four estuarine systems—two on the Gulf coast of Florida (St. Andrews Bay and Suwannee Sound) and two on the Atlantic coast (St. Johns and Halifax rivers). Females in St. Andrews Bay, Suwannee Sound, the St. Johns River, and the Halifax River reached maturity at a carapace width (measured from lateral spine tip to lateral spine tip) of 116.5, 121.9, 129.5, and 123.7 mm, respectively. At both Gulf coast locations, year-round spawning was not observed; peak spawning occurred in early to late spring, and in St. Andrews Bay there was an additional fall spawning event. On the Atlantic coast, spawning females were collected almost year round, with the greatest abundance in winter through spring and an additional peak in late summer. Potential fecundity on both coasts was directly correlated with body size and was greatest at the beginning of each reproductive season. Egg diameter from crabs on both coasts was independent of female size and was influenced by month, with the largest egg diameters observed in the earlier months of the year. Overall, there was an inverse relationship between potential fecundity and egg diameter. Mean potential fecundity for females sampled in St. Andrews Bay, the Halifax River, and the St. Johns River was 1.8, 2.1, and 2.2 million eggs, respectively. This demonstrates that seasonality is important for blue crab reproductive output and for the timing of juvenile and fishery recruitment.
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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 | 0.000 | 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".