EFFECT OF ELECTRIC FISHING ON SUBSEQUENT CAPTURE OF FISH
EFFECT OF ELECTRIC FISHING ON SUBSEQUENT CAPTURE OF FISH
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DOI：
10.1111/j.1095-8649.1975.tb04609.x
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发表时间：
1975-01-01
影响因子：
2
通讯作者：
STOTT, B
中科院分区：
文献类型：
--
作者：
CROSS, DG;STOTT, B
实验表明，一系列重复的电捕鱼中的第一次会导致可捕性下降，因此第二次和随后的捕获量实际上是从减少的种群中获得的。因此，消耗（DeLury）估计数可能非常低。受影响的物种是roachRutilus rutilus（L.），gudgeonGobio gobio（L.），ruddScardiniusacetophthalmus（L.）从其他已发表的数据来看，可能是虹鳟（Salmo gairdneri Richardson）和鳗鱼（Anguilla anguilla（L.））。显然，被捕获并不会导致鱼变得不那么容易捕获。电场使一部分种群变得不可捕捉的原因尚不清楚，但可能与不应行为有关;这种效应持续3 ~ 24小时。一种方法是调整DeLury估计减少可捕性。
Experiments show that the first of a series of replicate electric fishings can cause a decrease in catchability so that the second and subsequent catches are made from what is, effectively, a reduced population. Depletion (DeLury) estimates can be thus seriously low. Species affected are roachRutilus rutilus(L.), gudgeonGobio gobio(L.), ruddScardinius erythophthalmus(L.) and, from other published data, probably rainbow troutSalmo gairdneriRichardson and eelsAnguilla anguilla(L.). Being caught does not, apparently, cause fish to become less catchable. The reason why an electric field causes a proportion of a population to become uncatchable is obscure but it may be that refractory behaviour is involved; the effect lasts for between 3 and 24 h. A method is given for adjusting DeLury estimates for decreased catchability.