Prevalence of the parasitic cymothoid isopod Anilocra nemipteri on its fish host at Lizard Island, Great Barrier Reef
Bibliographic record
Abstract
Parasites are ubiquitous in nature but assessing their prevalence in wild fish populations is often challenging due to their cryptic nature. Low abundance can also hinder detailed studies. Here, we report a relatively high prevalence (4.3%; range = 0–28%) of an ectoparasitic cymothoid isopod (Anilocra nemipteri) infecting the bridled monocle bream (Scolopsis bilineatus) on reefs surrounding Lizard Island on the northern Great Barrier Reef (GBR). The prevalence of infected and previously infected fish at this location was nearly 15%, which greatly exceeds reports from other localities on the GBR. At least one parasitised fish was observed at 75% of the reefs surveyed, although prevalence varied across sites. Parasitised S. bilineatus were, on average, 25% smaller than unparasitised or previously parasitised fish. Given that these parasites have known detrimental effects on host growth, survivorship and swimming ability, our observations suggest that A. nemipteri may influence the size structure of its host population in the wild. Since A. nemipteri is large, conspicuous and relatively abundant, it provides an ideal study system to examine a range of important questions on the evolutionary ecology of parasites.
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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 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.031 | 0.001 |
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; both teacher heads 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".