Author: Ronald Herbert Hicks
Publisher:
ISBN:
Category : Fishing
Languages : en
Pages : 75
Book Description
A primary objective of the management practices of the Oregon State Game Commission is to maximize and sustain the annual harvest of salmon and steelhead by sportsmen fishing in Oregon. Assessment of these practices is dependent upon an accurate determination of total annual sports harvest throughout the state. Present total harvest figures are derived under a report card system which requires each salmon-steelhead angler fishing in Oregon to purchase and subsequently return to the Game Commission a punch card giving dates, rivers, and numbers of salmon and steelhead caught during the year. Unfortunately, only about 30 percent of the salmon-steelhead anglers return their cards. Lacking information on the harvest characteristics of anglers not returning punch cards, estimates of total annual catch, total catch by river, month, and type of angler have been made by simple expansion of punch card reported catch. Inherent in this method of estimation are the assumptions that the average catch per angler by month, by river, by type of angler, and for the year are the same for anglers returning and for anglers not returning punch cards. This paper reports on an evaluation of these assumptions and on the method for estimating total catch. Evaluation of the assumptions is based on comparisons of catch rate estimates from sample data (not punch cards) collected from both anglers returning and anglers not returning punch cards. Sample data was collected by means of double return postcard questionnaires in a sample survey during 1951. Stratified sampling was employed with allocations approximately proportional to the angler-fishing months in each stratum. Variances for the catch rate estimates made for both groups of anglers were estimated using replicated subsampling. Nearly all comparisons indicate that the catch rates for anglers not returning punch cards were significantly lower than the catch rates for anglers returning punch cards. On the basis of the observed differences in catch rates, a procedure using ratios of the 1961 catch rate estimates is suggested for future estimates of total catch.
An Evaluation of the Punch Card Method of Estimating Salmon- Steelhead Sport Catch
Author: Ronald Herbert Hicks
Publisher:
ISBN:
Category : Fishing
Languages : en
Pages : 75
Book Description
A primary objective of the management practices of the Oregon State Game Commission is to maximize and sustain the annual harvest of salmon and steelhead by sportsmen fishing in Oregon. Assessment of these practices is dependent upon an accurate determination of total annual sports harvest throughout the state. Present total harvest figures are derived under a report card system which requires each salmon-steelhead angler fishing in Oregon to purchase and subsequently return to the Game Commission a punch card giving dates, rivers, and numbers of salmon and steelhead caught during the year. Unfortunately, only about 30 percent of the salmon-steelhead anglers return their cards. Lacking information on the harvest characteristics of anglers not returning punch cards, estimates of total annual catch, total catch by river, month, and type of angler have been made by simple expansion of punch card reported catch. Inherent in this method of estimation are the assumptions that the average catch per angler by month, by river, by type of angler, and for the year are the same for anglers returning and for anglers not returning punch cards. This paper reports on an evaluation of these assumptions and on the method for estimating total catch. Evaluation of the assumptions is based on comparisons of catch rate estimates from sample data (not punch cards) collected from both anglers returning and anglers not returning punch cards. Sample data was collected by means of double return postcard questionnaires in a sample survey during 1951. Stratified sampling was employed with allocations approximately proportional to the angler-fishing months in each stratum. Variances for the catch rate estimates made for both groups of anglers were estimated using replicated subsampling. Nearly all comparisons indicate that the catch rates for anglers not returning punch cards were significantly lower than the catch rates for anglers returning punch cards. On the basis of the observed differences in catch rates, a procedure using ratios of the 1961 catch rate estimates is suggested for future estimates of total catch.
Publisher:
ISBN:
Category : Fishing
Languages : en
Pages : 75
Book Description
A primary objective of the management practices of the Oregon State Game Commission is to maximize and sustain the annual harvest of salmon and steelhead by sportsmen fishing in Oregon. Assessment of these practices is dependent upon an accurate determination of total annual sports harvest throughout the state. Present total harvest figures are derived under a report card system which requires each salmon-steelhead angler fishing in Oregon to purchase and subsequently return to the Game Commission a punch card giving dates, rivers, and numbers of salmon and steelhead caught during the year. Unfortunately, only about 30 percent of the salmon-steelhead anglers return their cards. Lacking information on the harvest characteristics of anglers not returning punch cards, estimates of total annual catch, total catch by river, month, and type of angler have been made by simple expansion of punch card reported catch. Inherent in this method of estimation are the assumptions that the average catch per angler by month, by river, by type of angler, and for the year are the same for anglers returning and for anglers not returning punch cards. This paper reports on an evaluation of these assumptions and on the method for estimating total catch. Evaluation of the assumptions is based on comparisons of catch rate estimates from sample data (not punch cards) collected from both anglers returning and anglers not returning punch cards. Sample data was collected by means of double return postcard questionnaires in a sample survey during 1951. Stratified sampling was employed with allocations approximately proportional to the angler-fishing months in each stratum. Variances for the catch rate estimates made for both groups of anglers were estimated using replicated subsampling. Nearly all comparisons indicate that the catch rates for anglers not returning punch cards were significantly lower than the catch rates for anglers returning punch cards. On the basis of the observed differences in catch rates, a procedure using ratios of the 1961 catch rate estimates is suggested for future estimates of total catch.
Estimating the Harvest of Salmon by the Marine Sport Fishery in Puget Sound
Author: Robert Harvey Conrad
Publisher:
ISBN:
Category : Fishing
Languages : en
Pages : 102
Book Description
Publisher:
ISBN:
Category : Fishing
Languages : en
Pages : 102
Book Description
Report
Author: Oregon. State Game Commission. Fishery Division
Publisher:
ISBN:
Category :
Languages : en
Pages : 794
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 794
Book Description
Technical Bulletin
Author:
Publisher:
ISBN:
Category : Agricultural experiment stations
Languages : en
Pages : 682
Book Description
Publisher:
ISBN:
Category : Agricultural experiment stations
Languages : en
Pages : 682
Book Description
A Review of the Oceanography and Renewable Resources of the Northern Gulf of Alaska
Author: Donald H. Rosenberg
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 716
Book Description
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 716
Book Description
Annual Report of the Pacific Marine Fisheries Commission
Author: Pacific Marine Fisheries Commission
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 166
Book Description
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 166
Book Description
Technical Bulletin - Agricultural Experiment Station, Oregon State University
Author:
Publisher:
ISBN:
Category : Agricultural experiment stations
Languages : en
Pages : 1142
Book Description
Publisher:
ISBN:
Category : Agricultural experiment stations
Languages : en
Pages : 1142
Book Description
Northwest Anthropological Research Notes
Author: Roderick Sprague
Publisher: Northwest Anthropology
ISBN:
Category : Social Science
Languages : en
Pages : 126
Book Description
An Early Complex at the Mouth of the Columbia River - Rick Minor Kalapuyan Subsistence: Reexamining the Willamette Falls Salmon Barrier - F. Ann McKinney Buena Vista Stonewares: A Nineteenth Century Oregon Pottery - Daniel J. Scheans Abstracts of Papers Presented at the 36th Annual Northwest Anthropological Conference, 24-26 March 1983, Boise, Idaho The Interaction of Kin, Class, Marriage, Property Ownership, and Residence with Respect to Resource Locations among the Coast Salish of the Puget Lowland - Astrida R. Blukis Onat A Model of Large Freshwater Clam Exploitation in the Prehistoric Columbia Plateau Culture Area - R. Lee Lyman Evaporated Milk: Its Archaeological Contexts - James T. Rock The Use of the Electron Microscope for the Detection of Heat Treated Lithic Artifacts - John A. Draper and J. Jeffrey Flenniken
Publisher: Northwest Anthropology
ISBN:
Category : Social Science
Languages : en
Pages : 126
Book Description
An Early Complex at the Mouth of the Columbia River - Rick Minor Kalapuyan Subsistence: Reexamining the Willamette Falls Salmon Barrier - F. Ann McKinney Buena Vista Stonewares: A Nineteenth Century Oregon Pottery - Daniel J. Scheans Abstracts of Papers Presented at the 36th Annual Northwest Anthropological Conference, 24-26 March 1983, Boise, Idaho The Interaction of Kin, Class, Marriage, Property Ownership, and Residence with Respect to Resource Locations among the Coast Salish of the Puget Lowland - Astrida R. Blukis Onat A Model of Large Freshwater Clam Exploitation in the Prehistoric Columbia Plateau Culture Area - R. Lee Lyman Evaporated Milk: Its Archaeological Contexts - James T. Rock The Use of the Electron Microscope for the Detection of Heat Treated Lithic Artifacts - John A. Draper and J. Jeffrey Flenniken
Annual Report
Author: Oregon. Fishery Division
Publisher:
ISBN:
Category : Fish-culture
Languages : en
Pages : 328
Book Description
Publisher:
ISBN:
Category : Fish-culture
Languages : en
Pages : 328
Book Description
Salmon Workshop
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 264
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 264
Book Description