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Aquatic 1
Electro fishing theory
Question | Answer |
---|---|
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 |
What are your zones based on the location starting FROM the anode | (reading from left to right)..................kill zone-stun zone-fright zone |
Severals ways fish can respond to the presence of an electric shield are? | 1.Fright 2.Electrotetany 3.electronarcosis 4.electroaxis |
Electrotetany; Muscular _______ due to current | contractions |
Electronarcosis;Muscular _________ due to current | Relaxation |
Electrotaxis; forced swimming towards what? | anode |
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 |
Electrofishing works best in waters with conductivity values between what and what uS/cm | between 100 and 500 uS/cm |
To maximize injury to a fish; maximize what? | maximize anode size |
Optimize "___:___" ratio | Optimize "anode:cathode: ratio |
use an electro that does what? | minimizes steep voltage gadients |
The Unit of Resistance is what? and what does it do(drap) on electrical flow? | Ohms-resistance(drag)on electrical flow |
the unit of voltage is what? what is electrical pressure forcing the elctrical flow mean? | Volts(v)-Electrical potential |
The unit of power is what? also what does Rate of doing work mean? | Watts(W)-the rate of doing work |
what is the definition refering too? and what are the units? | Direct Current(DC) |
The Current flows in one direction and then in the orhter direction, what is this refering too? what are the units? | Alternating Current (AC) |
What is the the most common use for electrofishing? | Biological Sampling |
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. |
What is the appropriate crew size? | At least two members |
What does Current mean? What is the unit for current? | Rate of flow of electrical current. The Unit is Amps |
What is Resistance? What is the unit for resistance? | Is the drag on electrical flow. The Unit is Ohms |
What is Voltage? What is the unit for voltage? | Is the electrical presure forcing the electrical flow (Electrical Potential). The unit is Volts (V) |
Name and locate three automatic shut down (switches) on the LR 24 backpack electrofisher: | -Mercury Switch -Deadman Switch -Deepwater Sensor |
Name the plumbing parameters that are analogous (related)to the following electrical parameters. | Current= water flow Voltage= Water Volume (Volts) Resistance= Pipe size (Ohms) |