alexa Angling Definitions and Their Effects on the Accuracy of Count-Interview Creel Survey Harvest Estimates
Agri and Aquaculture

Agri and Aquaculture

Fisheries and Aquaculture Journal

Author(s): Kenneth W Phippen

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A roving-clerk creel survey was conducted at Parvin Lake, Colorado, concurrently with a complete daily census during the 1982 fishing season to determine the influence of five definitions of angling time on accuracy of harvest estimation. These definitions ranged from only the time with a line in the water to all activities during the period spent at the lake. For the 65 d sampled, four of the five seasonal harvest estimates were not significantly different from the complete census estimates. The best definition of angling time included the following activities: line in the water, changing tackle, and walking towards a fishing location. This definition allowed interviewed anglers to accurately respond to questions relating to activities included in the angling definition. Although one other definition resulted in a lower coefficient of variation in the seasonal harvest estimate, its use resulted in an overestimate of fishing hours because it was difficult to differentiate anglers from nonanglers. Failure to use the same definition of angling activity when angler counts and creel rate estimates are made can result in biased harvest estimates.

This article was published in North American Journal of Fisheries Management and referenced in Fisheries and Aquaculture Journal

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