Financial analysis of a potential scallop culture operation in British Columbia
Bibliographic record
Abstract
A financial model, developed in ASEASY AS spreadsheet software for application in shellfish aquaculture, is used to evaluate the profitability of culturing certain scallops in B.C. Growth and survival data are obtained from a project which cultured mixed populations of rock scallops (Hinnites multiruqosis), pink scallops (Chlamys rubida), and spiny scallops (Ci. hericia) . Cost data is derived from accounts of Japanese scallop culture and from examples of oyster long line culture in B.C. Product prices are estimated from Vancouver sales of fishery caught Chlamys and of east coast fresh adductor muscles. Given the estimated costs and assuming that seed is available, it is concluded that producing whole, live, 5-7 cm Chlamys and Hinnites would be profitable, assuming that Hinnites substitutes for Chlamys in this market segment. Lantern net culture, slightly more profitable than pearl net and ear hanging methods, exhibits an average annual net profit during years four and five of $72,192, based on production from one million seed per year, but the net present value is lower than that achieved by investing funds at 10% per year (compounded quarterly) for seven years. A 20% increase in selling price to $0.26/scallop results in an annual net profit greater than $100,000 for lantern net production of whole, 5-7 cm scallops, while the break even price is projected to be $0.13/scallop. Significant improvement in financial performance can be achieved by reducing labour cost, which is 33% of total costs for lantern net culture. However, doubling labour cost still does not reduce the net profit to zero. Increasing the growth rate by 175%, to approximately that of the Japanese weathervane scallop, increases the average annual profit from producing whole, 5-7 cm scallops, to $88,963. It is concluded that marketing the shucked meats of the mixed population of Chlamys and Hinnites from the above project is not profitable. From the limited data available, production of faster growing, 8-9 cm rock scallops for shucking is not profitable unless a price equivalent to $0.18/scallop is achieved. Production of 10-11 cm weathervane scallops for shucking is projected to provide a net profit of $36,981, but further delineation of financial feasibility must await data from ongoing culture projects.
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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 | 0.001 | 0.003 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.003 | 0.003 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.002 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.006 | 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".