. Commercial fisheries review. Fisheries; Fish trade. 26 BUREAU OF COMMERCIAL FISHERIES PROGRAMS Film Shows Lobster Enters Trap- Then Keeps Out Others BCF researchers looked at a film strip showing activity around new BCF-designed deep-sea lobster traps and saw something both valuable and disturbing to them and to lobstermen. As soon as one lobster entered a trap and captured the bait, he defended the entrance against any others that sought to enter ! More tests are planned to check this finding. If necessary, trap design changes will be made to correct BCF's Gloucester (Mass.) Technologi
. Commercial fisheries review. Fisheries; Fish trade. 26 BUREAU OF COMMERCIAL FISHERIES PROGRAMS Film Shows Lobster Enters Trap- Then Keeps Out Others BCF researchers looked at a film strip showing activity around new BCF-designed deep-sea lobster traps and saw something both valuable and disturbing to them and to lobstermen. As soon as one lobster entered a trap and captured the bait, he defended the entrance against any others that sought to enter ! More tests are planned to check this finding. If necessary, trap design changes will be made to correct BCF's Gloucester (Mass.) Technological Laboratory and the Exploratory Fishing and Gear Research Base are cooperating in studies of the best methods of trapping these lobsters. Researchers Transplant Oysters Earlier To Cut Spring Silting Loss BCF's Milford (Conn.) laboratory is deter- mining whether transplanting oysters in late March and early April is a successful way to prevent the mortalities that occur when oysters begin pumping later in the spring and smother in silt. This spring, 4 commercial companies transplanted 100,000 bushels of oysters ear- lier than usual to avoid such mortalities. One area along the edge of abed in New Haven harbor served as a "; Here, oysters began dying between March 29 and April 12 and continued to die through May. Total mor- tality was about 30%. Earlier Transplant Better Off The mortality of oysters transplanted earlier from this bed to a bed with no silt was less than 2%. Inspections of oysters transplanted early in Norwalk, Conn., also indicated losses under 2%. Irradiation at Sea Improves Quality of Perch BCF Seattle, Wash., reports recent tests demonstrated that low-level irradiation of whole Pacific Ocean perch at sea produced "s ignificant improvement in the quality" during the normal period of iced storage. After 11 days, fish irradiated at 50, 100, or 200 kilorads, either in prerigor or rigor state at sea and iced, were of good quality. Thos
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