Marine Biology Question.. ..

[Sam Wormley]

Retriever Internet wrote:
>
> Marine Biology Project:
>
> I am looking to develop a prototype device that acts like an electric fence
> in seawater to deter certain species of fish. My power source would be a 12
> volt marine battery. On the surface of the water I would have a cable with
> floats and on the bottom I would have a cable with weights. Nothing would
> exist between them except seawater. There would never be more than 6 to 8
> feet between the two. I am assuming that I would place positive electrodes
> on one cable and negative electrodes on the opposite cable, and connect each
> to the power supply. I would also need to control the voltage coming out of
> the power supply, since it would only need to be low-level, barely
> detectable by a human. I would also need to be able to have the voltage
> pulse between a given range, so it would not be the same current all the
> time. If all of this makes sense I would appreciate any guidance that I
> could get about properly setting this up in a lab situation in a poly tank.
> I would need to know what equipment to buy and where. Such as the electrodes
> and current controller. In addition, if anyone can think of a better way to
> accomplish this that would be fine too.
>
> Thank You
>
> David Dowds
> Sandy Hook,NJ

PURPOSE

DEFINE GOAL
Presumably to deter certain species of fish (without damaging them)

BACKGROUND RESEACH
Literature search -- What works, what's been tried, what is the physics involved
Environmental ramifications

TECHNICAL APPROACH

TIMELINE

BUDGET

EXPECTED OUTCOME

[tj Frazir]

Allready have one . First you colect the samples of fish you want out
a hear like sharks . Then you put em in a closed aria and see how they
actwhen serten sounds are made.
Some sounds send most fish away .