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7. ELECTROSHOCKING SAMPLERS<br />
Bayless, J.D. (1961). The use of electrical stimuli in live-picking<br />
organisms from bottom samples. Proc. 15th a. Conf. SEast Ass. Game<br />
Fish Commn, 286-288.<br />
Dittmar, H. (1951). Anwendungsmoglichkeiten des zerhackten Gleichstromes<br />
fur Okologische Arbeiten. (Possible applications of direct current for<br />
ecological work) (In German). Arch. Hydrobiol. 45, 217-223. [Used<br />
120 v D.C. shocker to separate animals from mud samples] S, M, FW<br />
Ervin, J.L. & Ball, R. C. (1974). Electronic devices for the capture of<br />
aquatic invertebrates. Tech. Rep. Inst. Wat. Res. Mich. State Univ.<br />
No. 40. 71 pp. [Used 110 v A.C. shocker to remove burrowing invertebrates<br />
from fine silt; sampling area enclosed by wooden box] S, M, FW<br />
Fahy, E. (1972). An automatic separator for the removal of aquatic<br />
insects from detritus. J. appl. Ecol. 9, 655-58. [Used pulsed D.C.<br />
shocker, 400 v, 30-60 cycles/s, for three periods of 2 min to drive<br />
invertebrates out of the substratum, into the current and finally onto<br />
collecting sieves] S, MC, FW<br />
Hughes, B.D. (1975). A comparison of four samplers for benthic macroinvertebrates<br />
inhabiting coarse river deposits. Wat. Res. 9, 61-9.<br />
[Used fish shocker to remove invertebrates from area enclosed by<br />
modified sampler of Neill (1938)] S, MCL, FW<br />
7<br />
Lehmann, U. (1967). Drift und Populationsdynamik von Gammarus pulex<br />
fossarum Koch. (Drift and population dynamics of Gammarus pulex fossarum<br />
Koch) (In German). Z. Morph. Okol. Tiere 60, 227-274. [Electroshocker<br />
(0.6 kW) used to remove gammarids within sampling frame of 1 m 2 ;<br />
net used to catch shocked animals] S, MCL, FW<br />
44