Effects of Catch and Release for Recreational Fishing on Stream-Resident Salmonids in Japan

IF 2 3区 农林科学 Q2 FISHERIES
Yasunori Yamashita, Yuhei Kanzawa, Makoto Inoshita, Kyuma Suzuki
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引用次数: 0

Abstract

Catch-and-release (C&R) angling is becoming more common worldwide for managing stream-resident salmonids but has only recently been introduced in Japan. However, few studies have examined effects of C&R regulations on fish populations through adequate experimental designs. We estimated effects of implementing a C&R regulation on stream-resident salmonids. The western part of the Agatsuma River system in Japan is a fishing area with standard regulations under which anglers can harvest white-spotted charr or masu salmon of > 15 cm total length. In contrast, the eastern part is a fishing area with a C&R regulation requiring release of all caught fish, owing to radiocesium contamination caused by a nuclear accident at Fukushima. Density and total length of stream-resident salmonids were examined in these areas in several tributaries. Fish density was significantly higher in the C&R area, whereas total length did not differ significantly between areas. Implementing a C&R regulation may be effective for conserving salmonid populations in mountainous streams.

休闲垂钓对日本河栖鲑鱼的捕获和释放影响
捕放法(Catch-and-release, C&;R)在世界范围内越来越普遍,用于管理河流中的鲑鱼,但直到最近才被引入日本。然而,很少有研究通过适当的实验设计来检查C&;R法规对鱼类种群的影响。我们估计了实施C&;R法规对河流居民鲑鱼的影响。日本阿加间河流域的西部是一个捕鱼区,有标准的规定,垂钓者可以捕捞总长度为15厘米的白斑鲑或马苏鲑。相比之下,东部是一个捕鱼区,由于福岛核事故造成的放射性污染,有一项法规要求释放所有捕获的鱼。在这些地区的几条支流中调查了河栖鲑鱼的密度和总长度。C&;R区的鱼密度显著高于其他区域,而总长度在不同区域间差异不显著。实施C&;R法规可能对保护山区溪流中的鲑鱼种群有效。
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来源期刊
Fisheries Management and Ecology
Fisheries Management and Ecology 农林科学-渔业
CiteScore
3.80
自引率
5.00%
发文量
77
审稿时长
12-24 weeks
期刊介绍: Fisheries Management and Ecology is a journal with an international perspective. It presents papers that cover all aspects of the management, ecology and conservation of inland, estuarine and coastal fisheries. The Journal aims to: foster an understanding of the maintenance, development and management of the conditions under which fish populations and communities thrive, and how they and their habitat can be conserved and enhanced; promote a thorough understanding of the dual nature of fisheries as valuable resources exploited for food, recreational and commercial purposes and as pivotal indicators of aquatic habitat quality and conservation status; help fisheries managers focus upon policy, management, operational, conservation and ecological issues; assist fisheries ecologists become more aware of the needs of managers for information, techniques, tools and concepts; integrate ecological studies with all aspects of management; ensure that the conservation of fisheries and their environments is a recurring theme in fisheries and aquatic management.
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