An access-point survey approach to estimate recreational boat-fishing effort for stays of variable length
Fisheries Research(2022)
摘要
Management of recreational fisheries may greatly benefit from accurate and precise estimates of catch and effort. The reliable estimation of recreational boat-fishing effort is particularly challenging due to the methodologies, logistics and high costs involved. Here, we propose a two-stage approach to estimate the number of boat-fishing trips based on an access-point survey developed for situations in which boaters often stay in the area for more than one day, making several fishing trips during their stay. The two-stage approach consists of, first, estimating the total number of boat-days for the fishing season, where boats present in the coast may potentially go fishing, and, second, estimating the probability that a boat present in the coast does go fishing on a given day. We illustrate the method by applying it to a recreational fishery targeting rocky-reef fishes in the San José Gulf, Península Valdés, Argentina. When used on simulated data the new method produced unbiased and more precise estimates of the number of boat-days compared to the traditional access-point survey method. Gains in precision varied depending on the number of survey visits, the survey schedule (random or regular visits) and the actual (simulated) number of boat-days.
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关键词
Hook-and-line recreational fishing,Effort estimation,On-site monitoring,Simulation-estimation exercise,Rocky-reef fishes
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