The effect of temperature on life history parameters and cost of reproduction in the rotifer<i>Brachionus calyciflorus</i>
Bibliographic record
Abstract
We used the monogonont rotifer, Brachionus calyciflorus, to study the effect of ambient temperatures of 16°C, 22°C, and 29°C on longevity and life history parameters. We found that temperature had a significant relationship with longevity. At lower temperature, there was prolongation of the pre-reproductive and reproductive periods, but fecundity was reduced significantly due to suppression of the reproductive rate. When lifespan of short- and long-lived rotifers was compared, we found that the significant longevity difference in these rotifers was due to extension of reproductive and post-reproductive periods. The fecundity was significantly higher in longer lived rotifers due to the extension of the reproductive period, but the reproductive rate was significantly lower in these rotifers. A consistent negative relationship between rotifer longevity and the rate of reproduction was observed at all temperatures, and it was particularly pronounced in rotifers reproducing heavily at the end of the reproductive stage of their life cycle. The combined rate of living/oxidative damage theory may help explain the temperature effects that we observed.
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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 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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".