The present condition of recreational fisheries in the Yukawa River [Japan] surveyed by a questionnaire to anglers
2004
Kitamura, S. (National Research Inst. of Aquaculture, Nikko, Tochigi (Japan). Nikko Branch) | Ikuta, K. | Shikama, T. | Nakamura, H.
In order to survey the present condition of recreational fisheries in the Yukawa River, Nikko, Japan, where sportfishing in Japan originated more than 100 years ago, we conducted a questionnaire to the anglers in 2001. Of the 3,574 anglers who visited the Yukawa River during the fishing season in the year, total of 259 anglers an-swered the questionnaire (response rate: 7.25%). Among 3 angling methods (fly, lure and bait fishing), the ratio of fly-fishing was the highest at 63.3%. Catch rates (number of fish caught/angler-hour) of brook trout (Salvelinus fontinalis) by fly, lure and bait fishing were 0.92, 1.12 and 1.39, respectively. There was a significant difference in the catch rate between fly and bait fishing (p<0.01). Anchor-tagged brook trout (mean body weight: 230g) stocked at 4 different areas were reported to be caught with recapture rate of 27.5-77.5%. The trout stocked at the exclusive area for fly-fishing, where the anglers supposedly practiced catch-and-release, were caught with the highest recapture rate (77.5%) for about a month after release. In contrast, those stocked at 3 other areas were caught almost within 2 days after release with recapture rate of 27.5, 37.5 and 50%. Catch-and-release regulation would be effective to sustain brook trout stocks and acceptable to the anglers in the Yukawa River.
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