Effects of Granular 2',5-Dichloro- 4'-Nitrosalicylanilide (Bayer 73) on Benthic Macroinvertebrates in a Lake Environment. Efficacy of Antimycin for Control of Larval Sea Lampreys (Petromyxzon Marinus) in Lentic Habitats.

摘要

Benthic organisms were collected before, and during the first 13 days after, treatment of a selected area of a lake with granular Bayer 73 for control of larval sea lamprey (Petromyzon marinus) to determine the effects of the treatment on invertebrates. Total numbers of organisms in the treated area dropped 56% in the first 7 days after treatment. Most of the reduction occurred among oligochaetes and midge larvae. Numbers of mayfly nymphs and amphipods were not substantially affected. Total numbers of organisms and numbers of oligochaetes and midge larvae increased between 7 and 13 days after treatment. Judging from this study, treatments with Bayer 73 are expected to have only moderate effects of short duration on populations of macroinvertebrates.