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An investigation of factors affectin...

Jesien, Roman V.

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An investigation of factors affecting fish response to pulsed electric fields.

Record Type:	Electronic resources : Monograph/item
Title/Author:	An investigation of factors affecting fish response to pulsed electric fields./
Author:	Jesien, Roman V.
Description:	148 p.
Notes:	Source: Dissertation Abstracts International, Volume: 50-07, Section: B, page: 3070.
Contained By:	Dissertation Abstracts International50-07B.
Subject:	Engineering, Electronics and Electrical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=8924172

An investigation of factors affecting fish response to pulsed electric fields.
Jesien, Roman V.

An investigation of factors affecting fish response to pulsed electric fields. - 148 p.

Source: Dissertation Abstracts International, Volume: 50-07, Section: B, page: 3070.

Thesis (Ph.D.)--University of Maryland College Park, 1989.

The purpose of this research was to examine factors affecting fish response to pulsed electric fields and to evaluate their relevance to catchability by electrofishers. Effects of electric field characteristics on response were evaluated using threshold voltage gradients, defined as the minimum electrical potential eliciting paralysis, and three species i.e., channel catfish (Ictalurus punctatus), bluegill (Lepomis macrochirus), and striped bass (Morone saxatilis). Effects of electric fields on fish were evaluated using established physiological indicators of stress in striped bass.Subjects--Topical Terms:

626636
Engineering, Electronics and Electrical.

An investigation of factors affecting fish response to pulsed electric fields.
LDR:03018nmm 2200301 4500 001 1855676
005 20040629073627.5
008 130614s1989 eng d
035 $a (UnM)AAI8924172
035 $a AAI8924172
040 $a UnM $c UnM
100 1 $a Jesien, Roman V. $3 1943481
245 1 0 $a An investigation of factors affecting fish response to pulsed electric fields.
300 $a 148 p.
500 $a Source: Dissertation Abstracts International, Volume: 50-07, Section: B, page: 3070.
500 $a Director: Charles H. Hocutt.
502 $a Thesis (Ph.D.)--University of Maryland College Park, 1989.
520 $a The purpose of this research was to examine factors affecting fish response to pulsed electric fields and to evaluate their relevance to catchability by electrofishers. Effects of electric field characteristics on response were evaluated using threshold voltage gradients, defined as the minimum electrical potential eliciting paralysis, and three species i.e., channel catfish (Ictalurus punctatus), bluegill (Lepomis macrochirus), and striped bass (Morone saxatilis). Effects of electric fields on fish were evaluated using established physiological indicators of stress in striped bass.
520 $a Thresholds were inversely related to water conductivity and were log-linear over the test range (100 to 10,000 uS/cm). No minimum power requirement for response was observed as predicted by power transfer theory. According to theory, electrical power is transferred most efficiently from water into the fish when fish and water conductivity are equal. Based on threshold levels: (1) species specific and size specific responses were not evident; (2) fish were more sensitive (=lower threshold) to the cathode than anode; (3) responses were unaffected by pulsed Direct Current frequencies (30 and 120 Hz) when duty factor (time on/pulse period) was constant; (4) pulse widths (60 Hz AC) were inversely related to peak voltage thresholds but directly related to rms voltage thresholds; (5) thresholds for channel catfish held at 20 $\ sp\circ $\ sp\circ
520 $a Established indicators of stress revealed that electroshock affected plasma and Cerebrospinal fluid (Csf) electrolyte balance. Plasma ions Ca $\ sp{2+} $, K $\ sp+ $, PO $\ sb4\sp{3-} $, and proteins, and Csf cations clearly indicated that departures from internal electrolytic homeostasis had occurred. Electrolytic imbalance continued for the 24-h duration of the experiment. Affects were seen even in fish that behaviorally appeared minimally affected by exposure. Concentrations of glucose and Cl $\ sp- $ were equivocal as to indicating stress from exposure. Plasma cortisol levels suggested all fish were stressed from an unknown source prior to exposure.
590 $a School code: 0117.
650 4 $a Engineering, Electronics and Electrical. $3 626636
650 4 $a Agriculture, Forestry and Wildlife. $3 783690
650 4 $a Agriculture, Fisheries and Aquaculture. $3 1020913
690 $a 0544
690 $a 0478
690 $a 0792
710 2 0 $a University of Maryland College Park. $3 1249734
773 0 $t Dissertation Abstracts International $g 50-07B.
790 1 0 $a Hocutt, Charles H., $e advisor
790 $a 0117
791 $a Ph.D.
792 $a 1989
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=8924172