Development of a gradual hypoxia chamber for assessing copper toxicity on air-breathing behavior in <i>Lymnaea stagnalis</i>
Bibliographic record
Abstract
. Studies assessing the switch from water- to air-breathing in hypoxic conditions have previously utilized methods that neglect intricacies of animal behavior such as handling stress and acclimation. The chamber provides a linear decline in dissolved oxygen, against which surfacing behavior for air-breathing can be precisely measured. The maximum biomass of snails suitable for use in the hypoxia chamber, such that the nitrogen-driven deoxygenation curve is not altered by the snails' own metabolism, was established to be greater than 10 adult snails. The capacity of most analysis softwares is below accurately tracking 10 individuals at once, indicating this is likely not a limitation. The size of snails determined the amount of time each episode of aerial respiration was, with smaller snails spending more time air-breathing. A proof-of-principle experiment using acute copper exposure (0 - 60 µg/L) yielded a concentration-response curve, with greater copper concentrations inhibiting air-breathing. The chamber described in the present study provides an improved framework for assessing hypoxic response and is presented in a manner allowing for further modification to meet unique research needs.
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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) | 0.001 | 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) | 0.002 | 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".