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Book Stock Assessment for British Columbia Herring in 1997 and Forecasts of the Potential Catch in 1998

Download or read book Stock Assessment for British Columbia Herring in 1997 and Forecasts of the Potential Catch in 1998 written by Canada. Department of Fisheries and Oceans and published by . This book was released on 1998 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Stock Assessment for British Columbia Herring in 1996 and Forecasts of the Potential Catch in 1997

Download or read book Stock Assessment for British Columbia Herring in 1996 and Forecasts of the Potential Catch in 1997 written by and published by . This book was released on 1997 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: Herring are an important component of the British Columbia commercial fishery with catch records dating from 1877. Since 1983, herring fisheries have been managed with a fixed quota system in which catch levels are determined prior to the season based on a fixed percentage of forecast stock abundance. This report presents stock assessments from escapement and age-structured analytical models that were developed explicitly for B.C. herring. Both models reconstruct stock abundance from 1951 to last year and forecast pre-spawning abundance for the coming year. Forecasts of recruit spawners are presented as poor, average and good, based on historical recruitment levels. The report does not discuss the development and evaluation of empirical models for forecasting recruitment.

Book Stock Assessment for British Columbia Herring in 2002 and Forecasts of the Potential Catch in 2003

Download or read book Stock Assessment for British Columbia Herring in 2002 and Forecasts of the Potential Catch in 2003 written by J. F. Schweigert and published by . This book was released on 2002 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this study, herring stock abundance in British Columbia waters was assessed for 2002 and forecasts were made for 2003 using two analytical methods, an age-structured model for the major stock assessment regions and an escapement model for the minor stocks. These models have been applied to assess herring abundance since 1984 and changes were introduced to account for temporal change in the spawn index. All available biological data on total harvest, spawn deposition, and age & size composition of the spawning runs were used to determine current abundance levels. Forecasts of the pre-fishery spawning stock biomass are presented for both models.

Book Stock Assessment for British Columbia Herring in 1995 and Forecasts of the Potential Catch in 1996

Download or read book Stock Assessment for British Columbia Herring in 1995 and Forecasts of the Potential Catch in 1996 written by and published by . This book was released on 1996 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: Herring are an important component of the British Columbia commercial fishery with catch records dating from 1877. Since 1983, herring fisheries have been managed with a fixed quota system in which catch levels are determined prior to the season based on a fixed percentage of forecast stock abundance. This report presents stock assessments from escapement and age-structured analytical models that were developed explicitly for B.C. herring. Both models reconstruct stock abundance from 1951 to last year and forecast pre-spawning abundance for the coming year. Forecasts of recruit spawners are presented as poor, average and good, based on historical recruitment levels. The report does not discuss the development and evaluation of empirical models for forecasting recruitment.

Book Juneau Access Improvements

Download or read book Juneau Access Improvements written by and published by . This book was released on 1997 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Stock Assessment for British Columbia Herring in 1994 and Forecasts of the Potential Catch in 1995

Download or read book Stock Assessment for British Columbia Herring in 1994 and Forecasts of the Potential Catch in 1995 written by J. F. Schweigert and published by . This book was released on 1995 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Herring stock abundance in British Columbia water was assessed for 1994 and forecasts were made for 1995 using two analytical methods: (1) escapement model; and (2) age-structure model."--Page vi.

Book Stock Assessment for British Columbia Herring in 1992 and Forecasts of the Potential Catch in 1993

Download or read book Stock Assessment for British Columbia Herring in 1992 and Forecasts of the Potential Catch in 1993 written by Canada. Department of Fisheries and Oceans and published by . This book was released on 1993 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Stock Assessments for British Columbia Herring in 1986 and Forecasts of the Potential Catch in 1987

Download or read book Stock Assessments for British Columbia Herring in 1986 and Forecasts of the Potential Catch in 1987 written by D. Fournier and published by Nanaimo, B.C. : Fisheries and Oceans, Canada. This book was released on 1987 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: