Electro fishing theory
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| An electro fisher works by seting up an what bewtween a _______ and an _____ in the water | An electro fisher works by seting up an what bewtween a ANODE and an CATHODE in the water
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| What are your zones based on the location starting FROM the anode | (reading from left to right)..................kill zone-stun zone-fright zone
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| Severals ways fish can respond to the presence of an electric shield are? | 1.Fright 2.Electrotetany 3.electronarcosis 4.electroaxis
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| Electrotetany; Muscular _______ due to current | contractions
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| Electronarcosis;Muscular _________ due to current | Relaxation
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| Electrotaxis; forced swimming towards what? | anode
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| The change in what, with the respect to what? (the voltage gradient) has the most effect on fish. | the change in voltage with respect to distance has the most effect on fish
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| Electrofishing works best in waters with conductivity values between what and what uS/cm | between 100 and 500 uS/cm
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| To maximize injury to a fish; maximize what? | maximize anode size
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| Optimize "___:___" ratio | Optimize "anode:cathode: ratio
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| use an electro that does what? | minimizes steep voltage gadients
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| The Unit of Resistance is what? and what does it do(drap) on electrical flow? | Ohms-resistance(drag)on electrical flow
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| the unit of voltage is what? what is electrical pressure forcing the elctrical flow mean? | Volts(v)-Electrical potential
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| The unit of power is what? also what does Rate of doing work mean? | Watts(W)-the rate of doing work
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| what is the definition refering too? and what are the units? | Direct Current(DC)
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| The Current flows in one direction and then in the orhter direction, what is this refering too? what are the units? | Alternating Current (AC)
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| What is the the most common use for electrofishing? | Biological Sampling
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| Describe what a low head dam is? | Its a dam were fast moving water occurs as a result of the Hydralic is in a continuous motion to the point of drowning.
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| What is the appropriate crew size? | At least two members
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| What does Current mean? What is the unit for current? | Rate of flow of electrical current. The Unit is Amps
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| What is Resistance? What is the unit for resistance? | Is the drag on electrical flow. The Unit is Ohms
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| What is Voltage? What is the unit for voltage? | Is the electrical presure forcing the electrical flow (Electrical Potential). The unit is Volts (V)
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| Name and locate three automatic shut down (switches) on the LR 24 backpack electrofisher: | -Mercury Switch
-Deadman Switch
-Deepwater Sensor
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| Name the plumbing parameters that are analogous (related)to the following electrical parameters. | Current= water flow Voltage= Water Volume (Volts) Resistance= Pipe size (Ohms)
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