7123 ‎(3)‎

• UCREFRP Catalog Number: 7123
• Author: Klima, E. F.
• Title: Voltage and pulse rates for inducing electrotaxis in twelve coastal pelagic and bottom fishes
• USFW Year: 1972
• USFW - Doc Type: Journal of the Fisheries Research Board of Canada
• Copyright Material: YES

KLIMA: ELECTROTAXIS OF TWELVE FISHES
large (125-151 mm fork length) longspine porgies.
Analysis of the average values by Student's Tcst did not
show a difference between the response times. These
results show that the electrotaxi response is inde-
I[ = 1.158 and 18 df and [ = 0.630 and 29 df for
30 and 35 pulses/sec, respectively.
so
40
N
w
20
0
>60~
pendent of size in 86-151 mm longspine porgy for the
test conditions (i.e. 1.5 v/10 cm and pulse rates of 30 and
35/sec).
These results dictated care in selection of size groups
for this study. Consequently, the results of the most
suitable electrical combinations are for the size groups
of fish tested.
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~ Average Number of Laps
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3.0 4.0
VOLTAGE
F1G. 1. Times to swim two and five laps and average numbers of laps swum
by scaled sardines at different voltages per 10 cm at 15 pulses/sec. Each plotted
value is for an initial lot of 7-22 fish.
TADLE 1. Comparison of small (71-95 mm fork length) and large (]00-145 mn~) scaled sardine in their ability to be
led two and five laps with 1.5 and 3.0 v/10 cm at three pulse rates per second.

25
small

large Pulse rate
35
small large
45
small

large
Voltage 1.5
Avg. no. of laps 5.9 9.0 5.0 9.7 4.2 9.8
Time to swim
2 laps (sec) 25.8 8.2 29.6 6.5 30.3 5.9
5 laps (sec) 80.4 30.4 94.0 29.3 102.0 29.2
Optimal
response index 14.5 ~ 3.17a 4.1 ~0.9 6~ l 8.71.2.26 3.4 ~ 1.32 18.71=2.78' 3.4 ~_ 1.1
Voltage 3.0
Avg. no. of laps 4.9 2.3 4.6 1.1 3.5 0.9
Time to swim
2 laps (sec) 17.7 10.1 13.9 24.5 19.6 18.6
5 laps (sec) 37.5 0 51 .8 0 60.0 0
Optimal
response index 6.2~=2.41 infinite 5.4_1_4.73 infinite 16.8_L-6.58 infinite
°Average and 95°Jo confidence interval (20 fish pe r group) J