. Commercial fisheries review. Fisheries; Fish trade. 23 Other Species Tracked Shore monitors and technical assistance were provided the Fisheries Research Board of Canada to obtain data from sonic-tagged Atlantic lobsters. The Canadians hope to re- settle this species off the coast of British Columbia. Similar equipment was loaned to track shad in the Connecticut River, and bull shark in the Rio San Juan of Costa Rica. Once, Johnson went to Bermuda to join a team of scientists from Rockefeller Univer- sity and Woods Hole Oceanographic Institu- tion in an attempt to attach sonic tags to humpba
. Commercial fisheries review. Fisheries; Fish trade. 23 Other Species Tracked Shore monitors and technical assistance were provided the Fisheries Research Board of Canada to obtain data from sonic-tagged Atlantic lobsters. The Canadians hope to re- settle this species off the coast of British Columbia. Similar equipment was loaned to track shad in the Connecticut River, and bull shark in the Rio San Juan of Costa Rica. Once, Johnson went to Bermuda to join a team of scientists from Rockefeller Univer- sity and Woods Hole Oceanographic Institu- tion in an attempt to attach sonic tags to humpback whales. The whales outwitted the biologists at every turn. Finally, when tags were attached, the whales quickly brushed them off with a flick of their flippers. BCF Bugging Since 1955 BCF has been bugging salmon since 1955, when the first crude tag and receiving equip- ment were developed. The tag was nearly 5 inches long, 2 inches in diameter, and trans- mitted for about 8 hours. Since then, minia- ture transmission packages have been devel- oped. These make it possible to reduce tag size to about one fourth its original bulk and increase transmission time to 3 months. Originally, tags were attached to a salmon's back, where they frequently tore loose. Now they can be inserted in the stomach, where they have been known to remain until the salmon dies after spawning. andsteelhead trout disappear between major dams on the Columbia River. The biologists are determined to find the answer. In this sense, the studies aim to help the fish; in an- other, sonic research on salmon behavior in the sea may lead to more effective means to capture them. A Salmon You Can Call Your Own A simple method to brand young salmon for research purposes was developed and has been used for the past few years by BCF bio- logists in Seattle, Wash., and Auke Bay, Alas- ka. Fish branding is being used in studies of growth, behavior, migration patterns, and survival of young fish. Also, it may be used to
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