fisheries.org/units/education/fisheries_techniques/Chapter8/Night%20boat%20electrofishing %20unit.jpg Fish in an Electrical Field · Behavior change or reactive movement · Trauma from Stress due to physiology Injury due to mechanical tissue damage Fish in an Electric Field (cont.) · Low AC - fish lines up perpendicular to flux line · · - + · · · High AC - muscle contraction and tetany Injuries to Fish · Hemorrhages or bruising of soft tissue · Fractures of vertebrae · · · NOTE: AC is more likely to injure fish than pulsed DC Pulsed DC is more likely to injure fish than continuous DC 8.3 Electrofishing system · power source and power control unit · meters · wires & electrodes · other equipment (lights, nets, pumps, livewells) · boat · shocking system · backpack shockers Biological Factors · Species - shad susceptible..
ref to, selection / selective advantage; max 3 [12] 147. (a) dissolve / destroy, cell membranes (idea); 1 (b) block the receptor / prevent ACh from binding; no longer able to stimulate post synaptic membrane; muscle fibres, not stimulated (by nerve fibres) / do not contract; A tetany idea AVP; e.g. ref to lack of synaptic transmission max 2 (c) toxin acts too fast, for immunity / antitoxin to develop (idea); human unlikely to have been, bitten before / exposed to toxin or antigen; one / a / few (immature), lymphocyte(s) / stem cell(s) (able to bind the toxin); these must be stimulated to divide / ref to clonal selection or clonal expansion; mitosis takes too long;
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