in halibut and salmon during smoking but was less 

 effective in aiding the retention of moisture in black 

 cod. 



Vol. 5, No. 3. Use of electron paramagnetism 

 in research on fish lipids, by William T. 

 Roubal. August 1969, pp. 107-115, 3 figs. 

 ABSTRACT 

 The products of lipid oxidation cause undesirable 

 alterations, not only in lipids themselves, but also 

 in the quality of associated proteins, enzymes, and 

 other biomolecules. Fundamental studies of oxidiz- 

 ing lipids in biochemical systems are needed if these 

 undesirable changes are to be minimized. 



Measuring the paramagnetic properties of these 

 systems has great potential for elucidating the mech- 

 anism of the undesirable changes and thereby giving 

 us a possible way of finding how to control them. 

 Unfortunately, this technique of measurement is not 

 widely understood. 



This paper explains the technique and gives ex- 

 amples of how the measurement of paramagnetic 

 properties can be applied in research related to fish 

 lipids, particularly in the relation of free-radicals 

 to the loss of nutritive value and in the study of 

 antioxidant functions. 



Vol. 5, No. 3. Evaluation of muscle hypoxan- 

 thine and volatile bases as potential quality 

 indices for industrial bottomfishes from the 

 Gulf of Mexico, by Enrique J. Guardia and 

 Gerhard J. Haas. August 1969, pp. 117-120, 

 4 figs. 



ABSTRACT 

 Croaker and spot are the two species found most 

 commonly in catches of industrial bottomfishes in 

 the Gulf of Mexico. Hypoxanthine increased lin- 

 early in both species during the first 2 weeks that 

 these fishes were stored in ice. This test for hy- 

 poxanthine could thus indicate the quality of both 

 croaker and spot and presumably that of the whole 

 catch. Only after the fish had been stored 1 week 

 in ice, however, did the total volatile bases increase. 

 Consequently, this latter test could not be used as 

 an index of freshness, although it might be used 

 as an index of spoilage. 



Vol. 5, No. 3. Relative chemical composition and 

 nutritive values of king crab, Pnralithodes 

 camtsrhatica, and blue crab, CaUinectes sa- 

 pidus, by Robert R. Kifer and Paul E. Bauers- 

 feld. August 1969, pp. 121-131, 14 tables. 

 ABSTRACT 

 Alaska king crabs are being harvested in quantity. 

 The question has arisen as to the potential and com- 

 parative value of king crab meal in broiler diets. 

 Accordingly, king crab meal and blue crab meal 

 (an established product) were evaluated as to their 

 chemical composition and nutritive value when fed 



to chicks. Growth rates obtained were about equal 

 when (1) diets containing the various crab meals, 

 (2) a commercial diet, (3) diets containing men- 

 haden meal, or (4) a corn-soybean meal-methionine- 

 supplemented diet were fed. 



Vol. 5, No. 4. Value of menhaden, Brevoortia 

 tymnnus, meal as a protein supplement to 

 cottonseed meal-corn diets for pigs, by Robert 

 R. Kifer and Edgar P. Young. October 1969, 

 pp. 133-142, 2 figs., 6 tables. 

 ABSTRACT 

 Pig diets composed primarily of cottonseed meal 

 and corn are deficient in the amino acid lysine. This 

 study reports on whether supplementation by men- 

 haden meal can supply the lysine needed. A sig- 

 nificant improvement in rate of weight gain and in 

 utilization of feed resulted when menhaden meal 

 was fed as a feed supplement. No fishy flavor was 

 detected in loins of pigs fed diets containing as much 

 as 0.73 percent fish oil supplied by the menhaden 



Vol. 5, No. 4. Uptake of oxygen in refrigerated 

 radiopasteurized fish, by L. J. Ronsivalli and 

 B. L. Tinker. October 1969, pp. 143-149, 4 

 figs. 



ABSTRACT 

 In cans that contained haddock fillets and that 

 were ( 1 ) hei-metically sealed at atmospheric pres- 

 sure, (2) radiopasteurized, and (3) stored at about 

 0.5° C, the level of oxygen dropped from about 

 21 percent to about 2 percent within 30 days, at 

 which time the percentage of oxygen was still falling. 

 This decrease in the concentration of oxygen indi- 

 cates that the atmospheric environment within the 

 cans was conducive to the growth of aerobes, micro- 

 aerophiles, facultative anaerobes, or anaerobes at 

 various stages of oxygen depletion during the 

 storage. 



Vol. 5, No. 4. Test-tank studies of shrimp-pot 

 efficiency, by Doyne W. Kessler. October 1969, 

 pp. 151-160, 6 figs., 2 tables. 

 ABSTRACT 

 How spot shrimp and dock shrimp escape from 

 shrimp pots and how they react to each of five 

 designs of .shrimp-pot entrances were studied. Ob- 

 servations of pot efficiency — that is, of the number of 

 shrimp entering and escaping each type of pot in 

 a given time — indicate that a long conical tunnel 

 was the most effective of the entrances tested. 



Vol. 5, No. 4. Distrilnition of royal-red shrimp, 

 Hyinenopenaeus robustus, on three potential 

 commercial grounds off the southeastern 

 United States, by Richard B. Roe. October 

 1969, pp. 161-174, 8 figs. 



