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The Effect of Current Speed on the Distribution of the Larvae of the Blackflies, Simulium variegatum (Mg.) and Simulium monticola Fried. (Diptera)

Published online by Cambridge University Press:  10 July 2009

J. Phillipson
J. Phillipson
Affiliation:
Department of Zoology, Durham Colleges in the University of Durham.
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Extract

Field and laboratory studies on the water-velocity preferences of the larvae of Simulium monticola Fried, and S. variegatum (Mg.) show that both species occur in velocities of 0·5–2·5 m./sec. but aggregate in the velocity range 1·0–2·0 m./sec.

The velocity range that the larvae of different species of Simulium can withstand indicates that current speed plays an important part in governing the distribution of blackfly larvae, and perhaps isolating different species along watercourses.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 48 , Issue 4 , December 1957 , pp. 811 - 819
Copyright
Copyright © Cambridge University Press 1957

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