Behavioural response of the Northern basket star Gorgonocephalus arcticus to mechanical stimulations
Bibliographic record
Abstract
Gorgonocephalus arcticus, a basket star from the deep St. Lawrence Estuary shows intensity and tactile discriminatory abilities. The pinpoint mechanical stimulation of the disk induces a succession of reactions involving general arm coiling and covering of the disk by radii. The statistical comparison between temporal development of arm movements provoked by different intensities of stimuli demonstrates that G. arcticus reacts faster and stronger to a strong pressure than to a light or intermediate one. A pressure inflicted to an arm does not generate a global reaction but a localized and slow movement of the surrounding ramifications. In the case of a simultaneous double-site stimulation, a complete reaction, including covering of the disk, occurs only when both stimulations are inflicted to the radial shield. When the two stimuli involve adjacent arms, the same arm or an arm and the disk, almost no reaction is observed. A discrete local activity is perceptible after successive stimulation of two adjacent arms. This study presents the first behavioural observations of mechanosensitivity made on basket stars. These ophiuroids seem to develop a more complex pattern of reactions than the one observed in unbranched brittlestars, which could suggest a different level of organization of the nervous system.
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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) | 0.000 | 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 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".