The role of nonapeptides in electrocommunication behaviour in gymnotiform weakly electric fish
Bibliographic record
Abstract
The nonapeptide hormones, arginine vasotocin (AVT) and isotocin (IT), play important roles in mediating a wide range of social behaviour in fish. Gymnotiform weakly electric fish use their electric organ discharge (EOD) to produce an expansive array of social electric signals. These behaviours share relatively simple neural elements by which they are controlled. The first section of this thesis reviews the current literature pertaining to nonapeptide influence on electrocommunication behaviour. AVT has been shown to modulate various electrocommunication behaviours by influencing segregated neural pathways controlling distinct electric displays. In pulse-type weakly electric fish, AVT modulates nocturnal increases in EOD frequency (EODf). Among these same fish, AVT also had an effect on EOD rate changes signalling submission and dominance. In wave-type fish, AVT modulates the production of two types of "chirps" â transient increases in EOD used as courtship or aggressive signals. AVT decreased the production of aggressive signals and increased the production of courtship signals. AVT also increased the magnitude of the jamming avoidance response (JAR), the communicative function of which is still poorly understood. The second section of this thesis was aimed at investigating the effects of IT on three electric behaviours in male Apteronotus leptorhynchus, a South American wave-type electric fish: baseline EOD, the JAR, and chirping behaviour. Intramuscular injection of IT showed no statistically significant effect on any of the three behaviours. The lack of a response to IT was somewhat surprising since the behavioural functions of AVT and IT systems are related. A number of reasons are discussed that may explain the lack of response, chief among them being the possibility that receptor expression was low in the fish tested. Further exploration of IT and AVT in relation to communication is warranted and weakly electric fish are a particularly advantageous system in this regard.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.002 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.002 | 0.000 |
| Research integrity | 0.001 | 0.002 |
| 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".