. Commercial fisheries review. Fisheries; Fish trade. 30 COMMERCIAL FISHERIES REVIEW Vol. 20, No. 6 at 9 a. m. on April 15, and by 2 p. m. dead lampreys, most about four inches long, were beginning to appear downstream. The river was chosen because of its proximity to the Bureau of Commercial Fisheries Hammond Bay laboratory, where work against the lamprey has been un- der way for several years. The river was stocked with 500 brook and rainbow trout prior to the test. The chemical later made many of these fish groggy, but apparent- ly did not kill them. A similar test last fall on nearby Ellio
. Commercial fisheries review. Fisheries; Fish trade. 30 COMMERCIAL FISHERIES REVIEW Vol. 20, No. 6 at 9 a. m. on April 15, and by 2 p. m. dead lampreys, most about four inches long, were beginning to appear downstream. The river was chosen because of its proximity to the Bureau of Commercial Fisheries Hammond Bay laboratory, where work against the lamprey has been un- der way for several years. The river was stocked with 500 brook and rainbow trout prior to the test. The chemical later made many of these fish groggy, but apparent- ly did not kill them. A similar test last fall on nearby Elliott's Creek showed the same results. Officials from a Michigan chemical firm, the Fisheries Research Board of Canada, and the U. S. Fish and Wildlife Service's Bureau of Commercial Fisheries coordinated efforts in this project. The work was aimed at ironing out difficulties in analysis of water samples and in use of the chemical. It was not designed as a full-scale management procedure. A full report of the work was not expected immediately, but it was obvious the chemical had harvested close to 100 percent of lampreys in the stream. Further work, both tests and management, is expected on Lake Superior streams later this year. Lake Superior still has a remnant lake trout population and officials are hope- ful the chemical will help save the remaining trout. Gulf Exploratory Fishery Program EXPLORATORY FISHING FOR RED SNAPPER WITH ROLLER-RIGGED OTTER TRAWL (M/V Silver Bay CruisTTy: The hard bottom areas 15-60 fgthoms in the northeast Gulf of Mexico extending from the Mississippi Delta to 86 30' W. (south of Destin, Fla.) were fished with a roller-rigged otter trawl by the U. S. Bureau of Commercial Fisheries chartered exploratory fishing vessel Silver Bay during a March 1958 cruise. The primary objective was to dis- cover if red snappers could be found in commercial quantities on bottom too rough for otter trawls. Red snapper were taken in small quantities in 20 of the 44 tows ma
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