isopycnic sections. The distributions of tempera- 

 ture, salinity, dissolved oxygen, and dissolved phos- 

 phate-phosphorus are shown on the 0-, 20-, 50-, 

 100-, 200-, and 400-m horizontal surfaces and on 

 the 25- and 26-g/l isopycnic surfaces. Topogra- 

 phies of the thermocline and the 25- and 26-g/l iso- 

 pycnic surfaces are shown also. 



28. Oceanic conditions off Sierra Leone, 10 

 February to 2 March 1965 (part of Geronimo 

 Cruise 5). By John T. Brucks, Merton C. 

 Ingham, and Thomas D. Lemingr. 1968, 45 pp. 

 on 1 microfiche. 



ABSTR.ACT 

 This atlas comprises a series of horizontal and 

 isopycnic sections. The distributions of tempera- 

 ture, salinity, dissolved oxygen, and dissolved phos- 

 phate-phosphorus are showTi on the 0-, 20-, 50-, 

 100-, 200-m horizontal surfaces, and on the 25- and 

 26-g/l isopycnic surfaces. Topographies of the 

 thermocline and the 25- and 26-g/l isopycnic sur- 

 faces are shown also. 



29. Data on the feeding habits of the green 

 crab, Carcinns maenas (L.). By John W. 

 Ropes. 1968, 39 pp. on 1 microfiche. 



ABSTRACT 

 Information on the stomach contents of green 

 crabs caught in Plum Island Sound, Mass., and 

 Hampton Harbor, N.H., is tabulated in this report. 



30. Biological conditions in the northwestei-n 

 Gulf of Guinea, Geronimo cruises 3, 4, and 5, 

 February 1964 to March 1965. By Conrad 

 V. W. Mahnken, Jack W. Jossi, and Mead 

 McCabe. 1968, 51 pp. on 1 microfiche. 



ABSTRACT 

 This atlas comprises a series of measurements 

 of carbon fixation and distributions of zooplankton 

 displacement volumes and copepod species. 



Fishery Industrial Research 



Vol. 4, No. 2. Proximate composition and sodi- 

 um potassium contents of four species of tuna. 

 By Neva L. Karrick and Claude E. Thurston. 

 April 1968, pp. 73-81, 10 tables. 

 ABSTRACT 

 The following species of tuna were studied; al- 

 bacore (Germo alahinga) , bluefin (Thunnus thyn- 

 nus), skipjack (Katsuwonus pelamis), and yellow- 

 fin (Neotlmnrms macropterus) . Data are reported 

 for the light and dark meat of the nape, center, and 

 tail sections of the fish. 



Vol. 4, No. 2. Use of sodium acid pyrophosphate 

 to retain natural moisture and reduce struvite 



in canned king crab. By Robert Jones. April 

 1968, pp. 83-89, 1 fig., 3 tables. 

 ABSTRACT 



Sodium acid pjTophosphate in varying concen- 

 trations was added at two levels of pH to king crab 

 during canning. Salt also was added. 



Adding 0.25 and 0.35 percent of sodium acid py- 

 rophosphate increased the retention of moisture by 

 almost 2 percent. Struvite either did not develop 

 or developed very little during storage of the product 

 for 1 year. 



Addition of pyrophosphate in concentrations 

 greater than 0.35 percent adversely affected the 

 taste of the product. Addition of pyrophosphate 

 in concentrations less than 0.25 percent did not im- 

 prove the product. 



Vol. 4, No. 2. Mechanized haul seine for use in 

 farm ponds. By Kenneth L. Coon, Alfred 

 Larsen, and James E. Ellis. April 1968, pp. 

 91-108, 14 figs., 2 tables. 



ABSTRACT 

 Present methods of har\-esting fish from farm 

 ponds are time consuming, laborious, and wasteful 

 of water. This paper supplies information on a 

 mechanized system in which a haul seine and asso- 

 ciated equipment are used to capture fish in farm 

 ponds and a conveyor and associated equipment are 

 used to load and weigh the fish into trucks for ship- 

 ment to market. The mechanized seine works well 

 both in ponds of small or large size and water as 

 deep as 8 feet. 



Vol. 4, No. 3. Efl^ect of special handling of had- 

 dock on the postirradiation shelf life of had- 

 dock fillets. By Vincent G. Ampola and Louis 

 J. Ronsivalli. June 1968, pp. 109-111, 1 table. 

 ABSTRACT 

 Improved techniques for handling eviscerated 

 haddock after capture resulted in superior quality 

 of the fish prior to irradiation and a significant ex- 

 tension in the post-irradiation shelf life of fillets 

 cut from them. 



Vol. 4, No. 3. Sonic system for determining dis- 

 tances between selected points of an otter 

 trawl. By Leon E. French, Jr. June 1968, 

 pp. 113-125, 9 figs. 



ABSTRACT 

 Trawl gear is rigged with several sonic trans- 

 ducers connected to a shipboard recording-type echo 

 sounder by means of a special cable. Trawl dimen- 

 sions are recorded continuously and simultaneously 

 under a specially calibrated scale. 



Vol. 4, No. 3. Echo reflector for sonic measur- 

 ing system on an otter trawl. By Leon E. 

 French, Jr. June 1968, pp. 127-131, 3 figs. 



