The accumulation of butter sole within Skidegate inlet provides an important winter trawl fishery for northern British Columbia. The availability, prior to spawning, has been determined from catch statistics offered willingly by fishermen and industry. The availability fluctuates during the season but the real peak period, after the accumulated stock has been removed, occurs during the last week that fishing was permitted. Distortions which could have been produced by boats of different fishing efficiencies and, also, by boats which fished for only part of the season are compensated for. The minimum estimate of fishing intensity, as determined from tagging experiments, is 30.8%. The abundance of the stock, calculated from the fishing intensity, sex ratios, and length-weight data, is approximately 3,130,000 fish. The differential appearance of the sexes upon the grounds has been determined. The male fish appear upon the grounds first and are later followed by the females. Tag returns provide information concerning movement between the various grounds within the inlet and also dispersion from the inlet into Hecate strait after spawning has occurred. / Science, Faculty of / Zoology, Department of / Graduate
| Identifer | oai:union.ndltd.org:UBC/oai:circle.library.ubc.ca:2429/41489 |
| Date | January 1949 |
| Creators | Manzer, James I. |
| Publisher | University of British Columbia |
| Source Sets | University of British Columbia |
| Language | English |
| Detected Language | English |
| Type | Text, Thesis/Dissertation |
| Rights | For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use. |
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