BUKEAU OF FISHEEIES XIII 



Commercial fishes : 



Anadromous species — Number 



Shad -- 19, 490, 000 



Glut herring 50. 000, 000 



Striped bass 9, 500, 000 



Salmon — 



Atlantic 3, 969, 000 



Pacific 175, 748, 000 



Interior waters (including Great Lakes) species — 



Whitefish 157, 415, 000 



Cisco 63, 400, 000 



Lake trout 25, 729, 000 



Pike perch 195, 353, 000 



Yellow perch 115, 298, 000 



Carp 138, 023, 000 



Buftalofish 115, 488, OOO 



Marine species — ■ 



Cod 1, 525, 298, 000 



Haddock 447, 428, 000 



Pollock 240, 219, 000 



Winter flounder 3, 604. 668, 000 



Mackerel 10. 461. 000 



Miscellanecus fishes 25, 980, 000 



Total 7, 121, 806, 000 



PROPAGATION OF COMMERCIAL SPECIES 



Marine species of the Atlantic coast. — As the fishes propagated 

 by the bureau in this section are extremely prolific, the eggs are 

 taken in immense numbers. Most of them are incubated in hatch- 

 eries and the fry liberated soon after hatching. However, the low- 

 water density experienced in some of the egg-collecting fields makes 

 it imperative to plant the green eggs on the spawning grounds im- 

 mediately after fertilization has been accomplished. A consider- 

 able increase may be noted in the distribution of haddock and winter 

 flounder. On the other hand, the production of cod and pollock 

 fell far short of the results w^ith these species in the preceding year. 



Paclfc salmon. — The output of Pacific salmon was considerably 

 in excess of last year's production. Owing to the more favorable 

 conditions existing on the spawning grounds in the Columbia River 

 and in California, the egg collections of the chinook salmon ex- 

 ceeded those of last year by more than 40,000.000. More eggs of 

 the humpback salmon than last year were taken in the Afognak 

 (Alaska) field. 



Anadromous species of the Atlantic coast. — A comparatively suc- 

 cessful year was experienced in the propagation of shad. A pro- 

 longed period of cool weather lengthened the spawning season, and 

 while the egg collections did not equal those in the spring of 1929, 

 they exceeded the take in 1930 by a substantial margin. Eggs of 

 the striped bass were again collected at Weldon, N. C, after a year 

 of no production in 1930. Atlantic salmon propagation was aug- 

 mented at the Craig Brook (Me.) station by the acquisition of 

 several million additional eggs from Canadian hatcheries, and at 

 Edenton. N. C. the 1930 take of herring eggs was surpassed bv up- 

 ward of 70,000,000. 



Commercial species of interior ivaters. — Increases over 1930 figures 

 may be noted in the 1931 distributions of the fishes coming under 



