Population dynamics of stage-structured sequential hermaphrodites
Bibliographic record
Abstract
The population dynamics of sequential hermaphrodites were investigated using three-stage matrix population models. A simple hermaphrodite model with density-dependent reproduction exhibited monotonic asymptotic growth or decline depending on parameter values. After incorporating density-dependent survival and sex change, the model was parameterized for red grouper (Epinephelus morio), which exhibit protogynous life history, and the model was used to investigate the effects of fishing mortality on offspring production and population density. The sensitivity of offspring production to fishing mortality was less when sex change depended on the relative density of female to male (ratio-dependent sex change) or male density alone compared with either female density alone or no density dependence. Although strong ratio-dependent sex change also resulted in less sensitivity of equilibrium abundance to fishing mortality, it caused the population to fluctuate chaotically. This suggests that the strength and type of density dependence on sex change affect reproductive output, equilibrium abundance, and the types of dynamics exhibited.
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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 | 0.001 |
| 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 | 0.000 |
| 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".