Sexual selection and the evolution of genitalia in the guppy (Poecilia reticulata)
Bibliographic record
Abstract
In many taxa with internal fertilization and multiple-mating, male genitalia exhibit remarkable diversity among closely related species. In this thesis I examine genitalic variation and genitalic function in a model organism for the study of sexual selection, the guppy. I ask whether guppies from different populations vary in their genitalic structures, whether this variation is associated with the level of predation risk in a population, and how the genitalic claw functions. In Chapter 2, I present evidence of inter-population variation in genitalic traits and its association with predation regime. In Chapter 3, I show that the claw is not necessary for sperm transfer and that it may instead be advantageous in matings with unreceptive females, thus suggesting a sexual conflict function. In Chapter 4, I provide evidence that the claw does not function to stimulate females into biasing fertilization success, suggesting that the claws are not favoured by cryptic female choice.
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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 | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| 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 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".