Distribution and life history of the Unionidae (Bivalvia: Mollusca) in the Assiniboine River drainage in Manitoba, with special reference to Anodontoides ferussacianus
Bibliographic record
Abstract
This study examined the distribution of the freshwater mussels in the Assiniboine River and some of its tributaries in Manitoba, and the life history of the cylindrical floater mussel ('Anodontoides ferussacianus ') in a small prairie stream. Twelve species of freshwater mussels were found in the Assiniboine River drainage. Each species exhibited specific st eam size and substrate preferences. Examination of species occurrences resulted in the identification of four species categories based on stream size preferences (small stream, medium stream, large stream, and ubiquitous categories), but some overlap existed between one category and the next. Individuals of 'A. ferussacianus' in the Cypress River near St. Alfonse, Manitoba, displayed a bradytictic breeding pattern. Fertilization of ova occurred in late July and early August, and mature glochidia were released from marsupia in May and June. Individuals in this population matured at age 1, which is the lowest recorded for any species of freshwater mussel.The growth rate and density of 'A. ferussacianus' in the Cypress River is similar to other populations of freshwater mussels in lotic systems. Young individuals comprised a large proportion of the mussels collected. This age structure may be due to selective predation of older year classes. Small, one year-old mussels were found beneath the sediment surface throughout the year. Older individuals (Year 2+) occurred at the sediment surface in May and June, after which they burrowed into the sediments. The seasonal vertical migration displayed by older individuals of 'A. ferussacianus' in the Cypress River probably was not a behavioral response, but rather because of high water velocities.
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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 | 0.001 | 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".