Distribution of the Polychaete assemblages on the continental shelf of the Northern Gulf of California, Eastern Pacific
Bibliographic record
Abstract
This study was aimed at analyzing the effect of environmental factors on the composition and distribution of polychaetes in the continental shelf of the Northern Gulf of California. Twelve stations at depths from 30 to 106 m were selected as representative of the region. A total of 2510 polychaetes belonging to 33 families and 152 species were identified. The Spionidae (15 species), Lumbrineridae (11 species), Onuphidae and Cirratulidae (10 species each) were the families with the highest number of species, although only the spionids (96.29 ind./0.1 m2) were found in considerable densities. Distribution of the assemblages clearly reflected the influence of sediment type. The polychaete fauna was divided in two main groups: those distributed in sandy sediments and those found in sediments with higher mud content. The sandy assemblages were represented by the Phyllodoce sp. 1 group, distributed in the outer continental shelf to the south of the study area; the Aglaophamus verrilli, Chone sp. 1 and Spiophanes duplex group, which was found on the inner and middle shelf; and by Prionospio (P.) ehlersi, Chaetozone setosa, Monticellina dorsobrachialis and Leiocapitella glabra, a group located in the deeper zones of the northern coasts. The assemblages associated with muddy–sand bottoms were mainly characterized by Paranaitis sp. 1, found on the eastern coasts, and by the fauna distributed in the western region, where Scoloplos texana was the most common species.
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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 | 0.001 |
| 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".