Source of alarm substances in crayfish and their preliminary chemical characterization
Bibliographic record
Abstract
We tested the hypothesis that hemolymph contains alarm substances in the crayfish Procambarus clarkii (Girard, 1852) and collected preliminary information on their chemical nature in this species. We analyzed crayfish responses in the presence of different test solutions in four experiments. The crayfish displayed an alerted behavior (i.e., feeding and locomotion were inhibited) in the presence of solutions containing different concentrations of hemolymph combined with food odor. However, hemolymph lost its bioactivity when tested 24 h after its extraction but maintained its ability to elicit alerted responses when diluted in a solution containing L-ascorbic acid. This may suggest that crayfish alarm molecules are degraded with time by oxidation. Microbial activity did not lead to the degradation of alarm substances, since hemolymph activity still declined after 24 h even if extracted and preserved in sterile conditions. Hemolymph molecules less than 5 kDa fractionated from hemolymph showed a strong bioactivity and were still bioactive after 24 h at 20 °C. As the 5 kDa fractioning eliminates all enzymes, we hypothesize that alarm substances are degraded through enzymatic reactions. Finally, we propose that alarm substances are peptides involved in the hemolymph clotting process.
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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) | 0.001 | 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".