Temporal and Spatial Variability in Metabolism of the Antarctic Pelagic Tunicate Salpa Thompsoni Foxton, 1961
Bibliographic record
Abstract
Abstract The weight-specific metabolic rates of the Antarctic pelagic tunicate Salpa thompsoni Foxton, 1961 were studied during March-April of 1998 and March 2002. The study revealed large variability in metabolic rates and attempted to explain the observed variability. The main factors driving variability, which were previously overlooked, included density of tunicates in incubation containers (incubation density), diel/circadian rhythms in salp ecophysiology, and spatial variability of their metabolic performance. The salp-specific respiration rates at 3°C were strongly negatively influenced by their incubation density ranging between 2.0 and 90.4 gWW·l−1. The metabolism of both salp life forms (solitaries and aggregates) appeared to be independent of their body mass. At incubation densities of 3 gWW·l−1, salps solitary and aggregate forms showed similar circadian rhythms in the respiration rates, with mean daytime and nighttime respiration rates of 79.5 and 41.5 µg O2·gWW−1·h−1 or 26.0% and 13.6% of the body carbon content, respectively. These specific respiration rates of S. thompsoni were assumed to be a "statistical norm" or climatology and were compared to actual field point observations during 1998 and 2002 near the Elephant Island, the South Orkney Islands, and the Bransfield Strait allowing calculating deviations from the "norm". This identified areas of the salp population either inhibition or successful performance that could be linked to the plankton community development and composition. The findings of this study highlighted the applicability of the metabolic theory in describing the salp ecological dynamics in the Southern Ocean.
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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 | 0.001 | 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 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".