Evaluating non‐lethal and latent effects of the anti‐sea lice pesticide azamethiphos on larvae and adults of the American lobster ( <i>Homarus americanus</i> )
Bibliographic record
Abstract
Both the American lobster fishery and salmon aquaculture are important to the economy of Atlantic Canada. Where these industries operate in proximity, research is needed to better understand any interactions and their possible effects. This study explored the effects of azamethiphos on survival and development of larval American lobsters, Homarus americanus, using exposures that reflect concentrations and durations of azamethiphos (anti-sea lice therapeutant used in salmon aquaculture) that can be found in the environment following treatment. In adult trials, we recorded the survival and behaviour of individuals consecutively exposed to short pulses of low concentrations of azamethiphos for a period of 1 to 4 days. Larvae from all stages (I-IV) exhibited an immobilization response when exposed to azamethiphos and that the concentration of azamethiphos that results in a 50% increase in immobilization decreases at increasing exposure time and was as low as 2.9 μgL−1 for a 3 h exposure. After exposure, we registered mortality occurring within 5 days and during the moulting window. In the larval trials the concentration required to reduce the acetylcholinesterase (AChE) activity by 50% increased from stages I to III. In the trials conducted with adults, we observed no mortality over 21 days, but did record an increase in aggressive behaviour with an increasing number of exposures. The temporal overlap between the release of larval lobster stages and the use of azamethiphos is important to consider when assessing potential risk.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| 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".