MetaData for Thesis: An Evaluation of the Punch Card Method of Estimating Salmon-Steelhead Sport Catch
Thesis: An Evaluation of the Punch Card Method of Estimating Salmon-Steelhead Sport Catch
Identification Information
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Citation
- Originator: Hicks, Robert H.
- Publish Date: August 7, 1964
- Online Link: None
- BPA Project #:
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Contact Information
- Agency: Oregon Department of Fish and Wildlife
- Name: Cedric Cooney
- Job Position: Natural Resources Data and Systems Manager
- Telephone: 503-947-6094
- E-Mail Address: Cedric.X.Cooney@odfw.oregon.gov
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Description
- Abstract: 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 1961. 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.
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- Purpose:
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- Time Period of Content: 1961
- Geographic Extent: Oregon
- Status: Final
- Use Constraints:
- Format: PDF File
Data Quality Information
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Data Information
- No data information was supplied.
Entity and Attribute Information
- Attributes Description:
Is a physical copy maintained for reference at Headquarters?
No
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