Characteristics of egg production of the planktonic copepod, Calanus finmarchicus, in the Labrador Sea: 1997–2010
Bibliographic record
Abstract
Egg production rates (EPRs) were measured for Calanus finmarchicus from the Labrador Sea during annual cruises between May and July from 1997 to 2010. EPRs ranged between 0 and 91 eggs f−1 day−1 at 95 stations. Clutch size (CS) was related to female size (prosome length, PL) and both were smallest on the Greenland (2.76 mm, 55.2 eggs) and Labrador (2.86 mm, 60.1 eggs) shelves and largest in the central basin (2.94 mm, 73.0 eggs). CS and spawning frequency (SF, the proportion of females spawning during a 24 h experiment) both increased with increasing female nitrogen content and decreased with increasing C:N ratio. CS and SF were also positively correlated and both increased with an increasing in situ chlorophyll concentration. The relationships between SF (% day−1) and EPR (as eggs f−1 day−1 or % body C or N day−1) and in situ chlorophyll concentration were well described by Ivlev functions (r2 = 0.30–0.34). The residuals from the Ivlev correlations for EPR (but not SF) were significantly negatively correlated with temperature for the central basin (r2 = 0.14), but unrelated over all sub-regions. Over the course of the bloom, as in situ nitrate concentrations decreased, the female N content and the CS decreased and the female C content and C:N increased. Overall, the EPR was most influenced by (i) local feeding conditions (in situ chlorophyll concentration), (ii) the state of the bloom (via effects on female age/condition) and (iii) long-term feeding and temperature history (via effects on female size), although a significant amount of variability remains unexplained.
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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 | 0.005 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| 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".