Contribution of catabolic tissue replacement to the turnover of stable isotopes in Danio rerio
Bibliographic record
Abstract
Stable isotopes of carbon, nitrogen, and sulfur in organisms can trace nutrient sources and determine trophic interactions. However, time is required for an organism to reflect the isotopic composition of its diet. The rate at which an organism incorporates the isotopic signature of its food has a growth (k) component and a metabolic tissue replacement (m) component. This study shows that metabolic tissue replacement accounts for between 68% and 80% of the observed changes in isotopic signature in zebra danio ( Danio rerio (Hamilton, 1822)) muscle following a dietary shift, with the remainder owing to growth of new tissue. The half-lives of carbon, nitrogen, and sulfur were ~53, ~147 and ~58 days, respectively. This indicates that a significant period of isotopic disequilibria exists before zebra danio resemble dietary isotopic composition. These results show that catabolic replacement of tissue, as well as growth, must be taken into account when predicting the rate of isotope incorporation in warm-water fish. When using isotopic ratios to decipher food webs and trophic interactions, researchers should be aware that the often held assumption of isotopic equilibrium between diet and consumer may be violated.
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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 | 0.001 | 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) | 0.002 | 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 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".