Vol. 5, No. 5. Author index of publications and 

 addresses — 1967 Bureau of Commercial Fish- 

 eries Branch of Technology and Branch of Re- 

 ports (Seattle), by Helen E. Plastino and 

 Mary S. Fukuyama. December 1969, pp. 215- 

 230. 



(No abstract.) 



Fishery Leaflet 



619. Alaska's fishery resources — The pink 

 salmon. By Jack E. Bailey. March 1969, iv 

 -I- 8 pp., 5 fig's., 2 tables. 

 ABSTRACT 

 Pink salmon, Oncorhynchus gorbuscha, also called 

 humpback salmon, are the most abundant of the 

 Pacific salmon in Alaska. Alaska production of pink 

 salmon has an average wholesale value of $28 million 

 and constitutes more than half of the total North 

 American catch. Female pink salmon carry about 

 2,000 eggs each and spawn in late summer or early 

 fall. The resulting fry emerge the following spring 

 and migrate directly to salt water. They spend 1 

 year at sea and return as 2-year-olds to spawn and 

 die in their native stream. Alaskan pink salmon 

 usually spawn only a short distance from the sea; 

 many even spawn in intertidal streambeds. Fewer 

 than 25 percent of the young survive from the time 

 of spawning until the time of emergence from the 

 gravel. Similar low survival rates prevail during 

 the estuarine and oceanic portions of the life cycle. 

 Pink salmon are just over 1 inch long when they 

 enter the sea, but they grow to an average length 

 of about 20 inches and weigh about 4 pounds as 

 adults. Research biologists of several agencies 

 assist fishery managers by determining the migra- 

 tion paths and the factors that affect abundance of 

 pink salmon. 



621. Fishery motion pictures, n. d. 26 pp. 



(No abstract.) - 



622. Separates from the Commercial Fisheries 

 Review. October 1969, 8 pp. 



(No abstract.) 



623. Recent advances in artificial culture of 

 salmon and steelhead trout of the Columbia 

 River. By Fred Cleaver. March 1969, iii + 

 5 pp., 4 figs., 1 table. 



ABSTRACT 

 The catch of salmon and steelhead trout from fish 

 reared in Program hatcheries increased rapidly be- 

 ginning in 1964. By 1967 the benefits from operation 

 of these hatcheries appeared to be well in excess of 

 their costs. The Oregon moist pellet diet was the 



greatest single factor in providing an economically 

 favorable operation. 



Further advances in hatchery efficiency are ex- 

 pected in the next few years. Conservation agencies 

 believe that the catch of hatchery-produced Colum- 

 bia River fall chinook salmon, coho salmon, and 

 steelhead trout can be increased substantially and 

 that the cost per unit of production can be decreased. 



624. List of Special Scientific Reports and Spe- 

 cial Scientific Report — Fisheries of the U.S. 

 Fish and Wildlife Service. March 1969, 52 pp. 



(No abstract.) 



625. United States tariff's on selected items of 

 commercial fishing gear. By Jurate E. Micuta. 

 February 1969, 11 pp., 2 tables. 



ABSTRACT 

 A list of equipment in the order of Tariff Sched- 

 ule classification numbers and a table of step re- 

 duction rates for some items are included. 



626. Available leaflets on fisheries. December 

 1969, 7 pp. 



(No abstract.) 



Special Scientific Report— Fisheries 



577. Relation of scale characteristics to river 

 of origin in four stocks of chinook salmon 

 (Oncorhynchus tshawytscha) in Alaska, by 

 Richard G. Rowland. January 1969, iii + 

 5 pp., 5 figs., 1 table. 



ABSTRACT 

 Differences in numbers of circuli and lengths of 

 radii through the first freshwater annulus were 

 used to test the hypothesis that the river of origin 

 could be determined from these characteristics. 

 .■\naly.ses indicated that males and females and dif- 

 ferent age groups of a brood year could be combined 

 for each river, but that comparisons between rivers 

 should be restricted to common brood years.. Al- 

 though average counts of circuli and average lengths 

 of radii were different in samples from each river, 

 the variability in these characteristics is great, and 

 neither characteristic is clearly diagnostic for the 

 stock in any of the rivers. 



578. Hydrological conditions in Clear Lake, 

 Texas, 1958-66, by Edward J. Pullen. Janu- 

 ary 1969, iii + 8 pp., 7 figs., 6 tables. 



ABSTRACT 



Temperature and salinity data were collected in 

 1958-66, and dissolved oxygen, dissolved organic 

 nitrogen, and total phosphorus analyses were made 

 on samples collected in 1964-66 in Clear Lake, a 

 small estuary that flows into upper Galveston Bay. 



Seasonal trends in bottom water temperature 



11 



