. Commercial fisheries review. Fisheries; Fish trade. November 1952 COMMERCIAL FISHERIES REVIEW I5 of Maine and adjacent waters. This project was carried out under a contract be- tween the U. S. Fish and Wildlife Service and the Old Dominion Research and De- velopment Corporation of Erica, Virginia. The work was directed by the Branch of Commercial Fisheries Electronics Scientist stationed at the University of Miami Marine Laboratory. The Corporation furnished technical personnel, the ves- sel, and the crew, and designed and built some of the equipment used. The work was done aboard the 88-foo
. Commercial fisheries review. Fisheries; Fish trade. November 1952 COMMERCIAL FISHERIES REVIEW I5 of Maine and adjacent waters. This project was carried out under a contract be- tween the U. S. Fish and Wildlife Service and the Old Dominion Research and De- velopment Corporation of Erica, Virginia. The work was directed by the Branch of Commercial Fisheries Electronics Scientist stationed at the University of Miami Marine Laboratory. The Corporation furnished technical personnel, the ves- sel, and the crew, and designed and built some of the equipment used. The work was done aboard the 88-foot auxiliary schooner Bowdoin—a vessel well-known for her many arctic exploratory voyages. The Bowdoin was chartered from its Provincetown, Massachusetts, owner and outfitted with special electronic equipment for listening to, amplifying, and recording underwater sounds in a fre- quency range from 10 cycles per second to 100,000 cycles per second. Some echo- ranging and echo-sounding equipment was also carried. Numerous cruises were made during August and September from Gloucester, Bos- ton, and other New England ports to locate schools of commercially-valuable fish, such as tuna and mackerel. When such schools were found, the hydrophones were put over the side and the sounds picked up in the water were amplified and recorded on magnetic tape recorders installed on the vessel. It is well known that certain marine animals make characteristic identifying noises. If this is found to be true of commercial species of fish, it may offer an efficient means of locating them. A number of recordings were made near schools of fish, primarily bluefin tuna and mackerel. Unfortunately only a few schools of t\ma were sighted due to the fact that apparently this species did not show up in New England waters this year in as large numbers as have been reported during most previous years. Recordings were made at night in Massachusetts Bay on schools of mackerel which were found by the phosphores
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Keywords: ., book, bookcentury1900, booksubjectfisheries, booksubjectfishtrade
