Electrofishing, a Power Related Phenomenon
Title | Electrofishing, a Power Related Phenomenon PDF eBook |
Author | A. Lawrence Kolz |
Publisher | |
Pages | 32 |
Release | 1989 |
Genre | Electric conductivity |
ISBN |
Applications of Salt in Electrofishing
Title | Applications of Salt in Electrofishing PDF eBook |
Author | Robert E. Lennon |
Publisher | |
Pages | 22 |
Release | 1958 |
Genre | Electric fishing |
ISBN |
A Lightweight Backpack High-voltage Electrofishing Unit
Title | A Lightweight Backpack High-voltage Electrofishing Unit PDF eBook |
Author | F. Phillip Sharpe |
Publisher | |
Pages | 20 |
Release | 1969 |
Genre | Electric fishing |
ISBN |
The object of these electrofishing investigations was to develop lightweight portable equipment for collecting fish in almost inaccessible high mountain streams.
In-water Electrical Measurements for Evaluating Electrofishing Systems
Title | In-water Electrical Measurements for Evaluating Electrofishing Systems PDF eBook |
Author | A. Lawrence Kolz |
Publisher | |
Pages | 36 |
Release | 1993 |
Genre | Electric conductivity |
ISBN |
A Guideline for Portable Direct Current Electrofishing Systems
Title | A Guideline for Portable Direct Current Electrofishing Systems PDF eBook |
Author | Donald W. Novotny |
Publisher | |
Pages | 28 |
Release | 1971 |
Genre | Electric fishing |
ISBN |
Electrofishing and Its Harmful Effects on Fish
Title | Electrofishing and Its Harmful Effects on Fish PDF eBook |
Author | Darrel E. Snyder |
Publisher | |
Pages | 164 |
Release | 2003 |
Genre | Electric fishing |
ISBN |
Electrofishing, which involves a very dynamic and complex mix of physics, physiology, and behavior; has been a valuable sampling technique for over half a century, but its potentially harmful effects on fish must be recognized, monitored, and avoided or minimized, especially with respect to populations of endangered species. Spinal injuries and associated hemorrhages, although often not externally obvious or fatal, can occur anywhere in the electrofishing field at or above the intensity threshold for twitch. These injuries are believed to result from powerful convulsions 0 body musculature caused mostly by sudden changes in voltage. Significantly fewer spinal injuries are reported when direct current, low-frequency pulsed direct current (#30 Hz), or specially designed pulse trains are used. Salmoninae are especially susceptible. Endangered cyprinids of the Colorado River Basin are generally much less susceptible, but the endangered catostomid Xyrauchen Texanus appears sufficiently susceptible to warrant minimal-use policy. Other harmful effects, including bleeding at gills or vent and excessive physiological stress, are also of concern. Mortality, usually by asphyxiation, is a common result of excessive exposure to tetanizing intensities near electrodes or poor handling of captured specimens. Reported effects on reproduction are contradictory, but electrofishing over spawning grounds can harm embryos.
Electrofishing Boats
Title | Electrofishing Boats PDF eBook |
Author | Donald W. Novotny |
Publisher | |
Pages | 52 |
Release | 1974 |
Genre | Electric fishing |
ISBN |