电力捕鱼
危害
电力捕鱼期间,不论大小鱼类,全部都难以逃脱被电死的结果,虽然有时候鱼类只是被电晕,但是也损坏了鱼类的性腺,导致鱼类不孕、鱼卵、虾卵、泥鳅卵等都会被杀死,同时还会对水中的无脊椎动物造成伤害,电力捕鱼所到之处,鱼类灭绝,生态系统受损,渔业资源枯竭。[1][2][3]
电力捕鱼对人也有危险,有时候,为了攫取更大的利益,人们常常使用更高的电压,漏电或人在水中防护措施不当,则伤害自身。[1]
物理原理
电力捕鱼时,鱼类对电流强度的不同而产生3中反应,分别是:感电反应、趋阳反应、麻痹反应。
感电反应
使用最小电压或临界电压捕鱼时,鱼类感知到电压后,会颤动和逃避。
趋阳反应
中等电压捕鱼时,鱼类会迅速向阳极方向逃走,在交流电场的鱼群就会停滞不前。
麻痹反应
趋阳电场强度继续提高,鱼类就会昏迷麻痹,呼吸减弱,腹部上翻,最后被电压击毙。
相關法例
参考文献
- Helfman, Gene S (2007) Fish Conservation: A Guide to Understanding and Restoring Global Aquatic Biodiversity and Fishery Resources Island Press, pp. 452–453. ISBN 978-1-55963-596-7
- Hill, David; Fasham, Matthew; Tucker, Graham; Shewry, Michael and Shaw, Philip (2005) Handbook of Biodiversity Methods: Survey, Evaluation and Monitoring Cambridge University Press, pp. 383–385. ISBN 978-0-521-82368-5
- Fishery Research - Electrofishing 页面存档备份,存于 National Park Service, US Department of the Interior. Retrieved 2 October 2008.
- U.S. Fish and Wildlife Service (2004) Electrofishing 页面存档备份,存于
- Northop, Robert (1966) Electrofishing. IEEE TRANSACTIONS ON BIO-MEDICAL ENGINEERING, VOL. BME-14, NO. 3, JULY 1967
外部链接
- Delaware Division of Fish and Wildlife, Fish Monitoring via Electrofishing 页面存档备份,存于
- Electrofishing Effects on Endangered Fishes 页面存档备份,存于
- International electrofishing email forum 页面存档备份,存于
- Electrofishing 页面存档备份,存于
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