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Last modified
7/14/2009 5:02:31 PM
Creation date
5/20/2009 2:48:50 PM
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UCREFRP
UCREFRP Catalog Number
7784
Author
Snyder, D. E.
Title
Impacts of Electrofishing on Fish.
USFW Year
1992.
USFW - Doc Type
\
Copyright Material
NO
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<br />10 Review I Electric Fields in Water <br /> <br />Impacts of Electrofishing on Fish <br /> <br /> <br />Power density <br />P,IlW/em3 <br /> <br />0.01 <br /> <br />, <br />~1 1 10 <br />Water Conductivity, e,IlS/em <br /> <br />100 <br /> <br />1000 <br /> <br />10000 <br /> <br /><'l 1000 <br />E <br />~800 <br />~800 <br />:::t. <br />"0 700 <br />c <br />COeoo <br />N. <br />E500 <br />~ 400 <br />:::t. 300 <br />E 200 <br />~ <br />> 100 <br />o <br />0.0001 <br /> <br />P = EJ = cE2 <br /> <br /> <br /> <br />Voltage gradient <br />E, V/em <br /> <br />Current density <br />. J,IlA/crp2 <br /> <br />Power density <br />P, IlW /em3 <br /> <br /> <br />0.001 0.01 <br /> <br />0.1 1 10 <br />Water Conductivity, e, JlS/cm <br /> <br />100 <br /> <br />1000 10000 <br /> 400 <br /> 300 <br /> N <br /> E <br /> 200 (.) <br /> < <br /> :::t. <br /> 100 <br /> <br />3.5 <br />S <br /> <br /> <br />(Power density = 100 IlW /em3) <br /> <br />2.5 <br /> <br />E 2 <br />~ <br /> <br />1.5 <br /> <br />0.5 <br /> <br />Voltage gradient <br />E, V/cm <br /> <br />o <br />10 <br /> <br />o <br />1500 <br /> <br />500 750 1000 <br />Water Conductivity, e, uS/em <br /> <br />1250 <br /> <br />250 <br /> <br />Figure. ~. Changes in voltage gradient and current density relative tc ..rater conductivity at a <br />constant power density of 100 J,1W/cm3. The top and middle graphs are the same except both a.xes are <br />logarithmic in the top graph and only the horizontal axis is logarithmic in the middle graph. Both <br />axes are arithmetic in the bottom graph which covers the range of conductivities typical of freshwater, <br />about 10 to 1,500 J,1S/cm (seawater is approximately 50,000 J,1S/cm.); the corresponding ranges in the <br />upper graphs are bounded by vertical lines. <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />
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