Effect of Growth Pattern and Exploitation Features on Yields of Pink Salmon in the Northwestern North Pacific
- 1 January 1966
- journal article
- research article
- Published by Oxford University Press (OUP) in Transactions of the American Fisheries Society
- Vol. 95 (1) , 39-51
- https://doi.org/10.1577/1548-8659(1966)95[39:eogpae]2.0.co;2
Abstract
Variations in biomass during the last 4 months at sea are shown, using either the estimates of growth and natural mortality given by T. Doi, or other, hypothetical estimates. Based on Doi''s description, biomass from 1-2 months before return is 4% greater than after return to inshore waters. However, under present conditions of exploitation (4 months offshore fishing with dropout, i.e. fatal interception of fish without capture, and an additional harvest of 50% of the inshore return) the combined yields are likely to be lower than inshore yields with prior offshore fishing absent. Doi''s index of rationality of offshore fishing is examined and compared with index numbers obtained when yields are expressed in units of harvestable excess over specific levels of spawner requirement.This publication has 2 references indexed in Scilit:
- Growth Rate of Central British Columbia Pink Salmon (Oncorhynchus gorbuscha)Journal of the Fisheries Research Board of Canada, 1964
- Ocean Growth and Mortality of Pink and Chum SalmonJournal of the Fisheries Research Board of Canada, 1964