Geology topics
Robert A. Braem
Publications and source records attributed to Robert A. Braem.
Albinism in lampreys in the upper Great Lakes
Albinism in fishes is relatively rare except in some stocks of hatchery-reared salmonids. In the Petromyzonidae, only four albino lampreys have been reported.
Distribution of fishes in U. S. streams tributary to Lake Superior
Experimental sea lamprey control by the Bureau of Commercial Fisheries on Lake Superior streams provided many new distributional records of the fish fauna. Seventy-one species were recorded from 175 streams. Specimens were collected at the electromechanical barriers, with electric shockers, with fyke nets, and during chemical treatment of streams. Maps showing stream records of each species are presented.
A back-pack shocker for collecting lamprey ammocoetes
IN 1958, THE BUREAU OF COMMERCIAL FISHERIES began to use specific larvicides for sea lamprey control in streams tributary to the Great Lakes. The successful application of larvicides required treatment of all areas of the streams infested by sea lamprey ammocoetes. Intensive surveys were needed to determine distribution of the larvae. The use of electrical methods to determinelarval distribution has been described (Stauffer and Hansen 1958). A light portable shocker was needed for these surveys because of the difficulty of access to some of the watersheds tributary to Lake Superior.