Effects of Lamprey Larvicides on Invertebrates in Streams (Classic Reprint)

Effects of Lamprey Larvicides on Invertebrates in Streams (Classic Reprint)

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Excerpt from Effects of Lamprey Larvicides on Invertebrates in Streams Twenty-one families of insects and six other groups of aquatic invertebrates were repre sented by five or more individuals per square foot in samples from riffles in treated and untreated streams. In the six treated streams, 64 percent of the groups decreased in number 1 week after treatment, 19 percent increased, and 17 percent showed little or no change (table lo).in the two control streams, 33 percent of the groups decreased. 50 percent increased, and 17 percent showed no significant change. For the orders of aquatic insects that were well represented, Trichoptera, Coleoptera, Ephemeroptera, and Diptera declined in the treated streams. Most other groups of invertebrates also declined in treated streams but showed no change in abundance in the two control streams. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.show more

Product details

  • Paperback | 22 pages
  • 152 x 229 x 1mm | 45g
  • Forgotten Books
  • United States
  • English
  • , black & white illustrations
  • 0243075030
  • 9780243075034