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Proceedings of the Zoological Society

, Volume 72, Issue 3, pp 246–256 | Cite as

On the Development of an Electric Fish Catcher

  • K. P. BiswasEmail author
  • N. A. Talwar
Research Article
  • 29 Downloads

Abstract

Catching fish with electricity is found to be the easiest and most effective than other methods of capture. In practice, a galvanotropic response of fishes in an electrical field is evoked in developing fish catching devices. These devices are commercially available in many countries, not only to capture the fishes but also to study fish population. As such a device is not in practice in India, an attempt has been made to develop an electrical fish catcher by using indigenous materials to be effective for fresh water fishes. Tests were carried out on eight Indian fresh water food fishes to identify their significant behaviours with rising current densities and to determine the threshold values initiating those reactions especially, for the galvanotropic response. The test results were synthesized to develop a prototype electrical fish catcher. Its performance was tested with respect to initiating galvanotropic reactions of fishes (all species together). The developed unit has two components (1) a specially designed catcher (anode) and (2) DC power supply by stepping down and rectifying AC to continuous DC and pulsed DC of very low frequencies. Two electrical (continuous and pulsed DC), two environmental (standing and flowing water) and three field patterns (made by different electrode arrangements) were tested to find out the most effective use of the catcher electrode for bringing out directional forced swimming of fishes towards the catcher electrode. The field generated with an alternate polarity system has shown significant results (90–100%) for influencing the fishes to galvanotropic reactions.

Keywords

Electric fish catcher Response of fishes Fisheries management 

References

  1. Benjamin, G.P and C.C. Gillespie. 1966. Type IV electrofishing shocker its characteristics and operation, SSP No 529, Bureau of Commercial Fisheries, United States, Dept. of Interior, Fish and Wild Life Service.Google Scholar
  2. Blasius, and F. Schweitzer. 1893. Beschreibung u. Benennung der “Galvano- Narcose”: Beobachtung der “Galvano- Hypnose”. Pflűger’s Archive 53: 527.Google Scholar
  3. Biswas, K.P. 1971a. Determination of threshold current densities for different reactions of fishes using a pantostat. Fishery Technology 8(1): 27–36.Google Scholar
  4. Biswas, K.P. 1971b. Studies on threshold current densities for convulsion of fish using a square wave stimulator. Fishery Technology 8(2): 143–155.Google Scholar
  5. Biswas, K.P., and S.P. Karmarkar. 1976. Reaction of fishes to the underwater A.C. field. Fishery Technology 13(1): 26–35.Google Scholar
  6. Biswas, K.P. 2015. Electrophysiology and fish behaviour. New Delhi: Daya Publishing House.Google Scholar
  7. Dolan, C.R., and L.E. Miranda. 2003. Immobilisation thresholds and electrofishing relative to fish size. Transactions of the American Fisheries Society 132: 969–976.CrossRefGoogle Scholar
  8. Herman, L. 1885. Eine Wirkung galvanische Strome auf Organismen. Pfluger’s Archiv. Fur dieges. Physiol. 37: 457–460.CrossRefGoogle Scholar
  9. Lamarque, P. 1967. Electrophysiology of fish subject to the action of an electric field. In Fishing with electricity: Its application to biology and management, ed. R. Vibert, 65–89. London: Fishing News Books Limited.Google Scholar
  10. Lennon, R.E., and P.S. Parker. 1955. Electric shocker developments on southeastern trout waters. Transactions of the American Fisheries Society 85: 234–240.CrossRefGoogle Scholar
  11. Loeb, J., and S.S. Maxwell. 1896. Zur Theorei des Galvanotropismus. Pflugers Archiv—European Journal of Physiology 63: 121–144.CrossRefGoogle Scholar
  12. Mach, E. 1875. Umfallen von Fischen gegen den negative Pol; elektrische Betaubung der Versuchstiere Grundlinien der Lehre von den Bewegungs Empfindungen. Leipzig.Google Scholar

Copyright information

© Zoological Society, Kolkata, India 2017

Authors and Affiliations

  1. 1.Department of Fishery Engineering, Faculty of Fishery SciencesWest Bengal University of Animal and Fishery SciencesKolkataIndia

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