Health Status of Olympia Oysters (<i>Ostrea lurida</i>) in British Columbia, Canada
Bibliographic record
Abstract
The Olympia oyster (Ostrea lurida) is the only oyster species native to British Columbia, Canada. Despite management regulations designed to protect this species, populations continue to decline in many locations. In an effort to determine whether parasites or disease are contributing to the population decline, oysters were collected from 5 locations and examined for the presence of pathogens and disease using histology and polymerase chain reaction (PCR) assays. Five parasite/symbiotic organisms were detected by histology, including Rickettsia-like prokaryotes, Mytilicola sp., Rhynchodida-like ciliates, encapsulated copepods, and an unknown protist. Six pathologies of unknown etiology were also detected, including hemocytic neoplasia, basophilic inclusions in the digestive gland epithelium, metaplasia of digestive gland tubules, diapedesis, and diffuse and focal hemocyte infiltration. Despite the variety of histological findings, most were detected at low prevalence and intensity, and are not believed to have a significant impact on the health of oysters at the individual or population levels. In addition, 7 different PCR assays were conducted for known bivalve pathogens, including Mikrocytos mackini, Haplosporidium spp., and Bonamia spp. Although all PCR test results proved to be negative, some assays did produce nonspecific amplification products, emphasizing the need for caution and validation when applying PCR assays to new hosts and new geographical regions. Although the current study did not identify any pathogens or diseases of concern, it provides important baseline data for future health assessments.
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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 | 0.002 | 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 | 0.001 |
| 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".