Marking decisions and host discrimination in a parasitoid attacking concealed hosts
Bibliographic record
Abstract
Host discrimination by the parasitoid wasp Halticoptera rosae was found to be based upon an external marking pheromone applied to the surface of rose hips in which the host, a fly (Rhagoletis basiola), had deposited its eggs in the fruit pulp. Female wasps marked the sites by repeatedly dabbing the tip of their ovipositor on the fruit surface and discriminated against conspecific marks through antennal contact with marked sites, resulting in cutting off the behavioural sequence leading to oviposition. The same behaviour was observed when wasps were offered fruits on which flies' oviposition sites were artificially marked with methanol extracts of female reproductive tracts, which suggests that the mark is chemical in nature and that the substance is associated with female oviducts and Dufour's or poison glands. Although the host flies respond to fruits that had been previously searched by wasps, no effect on wasp searching behaviour was found on fruits previously searched by conspecifics but without parasitization of the host. The adaptive significance of marking and discrimination decisions made by the parasitoid is discussed.
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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 | 0.000 | 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".