The stoneroller (Campostoma anomalum) is one of the more important fish in Great Smoky Mountains National Park because of its abundance and habits. Although esteemed locally as a food and a bait fish, the stoneroller is exploited but little since the fishing regulations which govern the utilization of game fishes afford it a large measure of protection. Distribution is controlled by gradient with an upper limit of 4.4 percent. Stonerollers limit reproduction of rainbow trout (Salmo gairdneri) by destroying trout redds. Artificial reduction of stoneroller populations is not considered a necessary management procedure.

The many problems involved in making fish collections and population surveys in trout streams of the Shenandoah and Great Smoky Mountains National Parks led to an investigation of electro‐fishing methods. These softwater streams have electrical resistivities ranging as high as 117,000 ohms cm3. Grounded electrode systems of conventional design proved ineffective in such waters. The Petty‐type, alternate‐polarity electrode system of original and modified design has been successfully tested in Park streams having resistivities of 32,000 to 117,000 ohms cm3. The addition of trailers to the electrode system has produced substantial improvements in the strength and range of the effective, electrical field in the water. The alternating current power sources for the electrodes include a gasoline‐driven portable generator and a battery‐powered backpack unit which produce 240 and 250 volts respectively.

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Studies of speech tempo commonly use syllable or segment rate as a proxy measure for perceived tempo. While listeners' sensitivity to syllable rate is well-established [1-4], clear evidence for listeners' additional sensitivity to segment rate that is, to syllable complexity alongside syllable rate is as yet lacking. In [5,6] we reported on experiments that showed no evidence for listeners' orientation to segment rate differences between stimuli that have the same syllable rate. In these experiments, we kept syllable rate constant by working with a single carrier phrase and equalizing phrase durations. Given that phrase duration is a separate temporal parameter from syllable rate, it is important to complement this work with experiments using less homogeneous stimulus sets, in which syllable rate is controlled without equalizing stimulus durations. In this paper we report on an experiment that uses stimuli selected from a corpus of unscripted British English speech. Within crucial subsets there was minimal variation in one out of syllable and segment rate, and substantial variation in the other. Stimulus duration varied independently. Listeners ranked stimuli for perceived tempo. Results suggest that faced with these more variable stimuli, listeners do orient to segment rate in ranking stimuli that have near-identical syllable rates presumably reflecting the influence of syllable complexity. Moreover, stimulus duration emerges as a separate factor influencing listeners' rankings.

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