. Commercial fisheries review. Fisheries; Fish trade. 12 COMMERCIAL FISHERIES REVIEW Vol. 12, No. 12. No/ember 1950 REFRIGERATION: For an evaluation of the keeping quality of Alaska shrimp-- (1) raw, (2) cooked, and (3) treated with ascorbic acid—sample frozen packs were prepared aboard the Service's exploratory fishery vessel John N. Cobb during its shrimp exploratory work in Ttenakee Inlet during November. (Ketchikan) Comparative tests were made on the various species of Pacific Coast rockfish held in cold storage with the following over-all results; Sebastes marlnus (At-, lantic coast rosef
. Commercial fisheries review. Fisheries; Fish trade. 12 COMMERCIAL FISHERIES REVIEW Vol. 12, No. 12. No/ember 1950 REFRIGERATION: For an evaluation of the keeping quality of Alaska shrimp-- (1) raw, (2) cooked, and (3) treated with ascorbic acid—sample frozen packs were prepared aboard the Service's exploratory fishery vessel John N. Cobb during its shrimp exploratory work in Ttenakee Inlet during November. (Ketchikan) Comparative tests were made on the various species of Pacific Coast rockfish held in cold storage with the following over-all results; Sebastes marlnus (At-, lantic coast rosefish) had the best salability, with no significant decrease due to storage changes. The Pacific coast Sebastodes alutus (long-Jawed rockfish) was very slightly inferior to the S. marlnus species but with practically no de- creasing quality due to discoloration or to storage changes. S. ruberrimus, (red snapper), S. paucispinis (bocaccio), and "idiot" rockfish (scientific name unknown) were all slightly inferior to the S. alutus with some indication of rancidity and discoloration being present. In the next classification came S. diploproa (lobe- jav/ed rockfish) and "chilipepper" (S, goodei?) which showed slight but definite indications of rancidity and discoloration. S. pinniger (orange rockfish) and S. miniatue (vermilion rockfish) were definitely rancid and had become considerably discolored due to oxidative storage changes. §. pinniger is one cf the common species marketed as rockfish by the Pacific Coast fillet industry. In the initial tests there was not a great deal of differ- ence between this species and the S. alutus samples examined. In the test described above, however, there was an enormous difference between these species due to de- velopment of very adverse storage changes by the S. pinniger rockfish. It would appear from the results of this test that the factor of storage alone would make S. alutus far superior to other common species of roc
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