640 



U. S. BUREAU OF FISHERIES 



bass fishing to that for trout, the production of bass is rapidly increas- 

 ing in importance and magnitude. The increase shown during the 

 past year is indicative of a reaUzation of possibihties in the propaga- 

 tion of black bass and suggests greatly increased efforts along this line 

 in the future. 



The species of fishes included under "other game fishes" and 

 ''commercial fishes" are not specified. As some fish, such as pike 

 perch, yellow perch, and lake trout are classed under one or the other 

 of these headings, figures covering such species are included under 

 both headings, though there are no duplications. 



SALVAGE OF FOOD FISHES 



The total number of fishes handled in the rescue work in the Mis- 

 sissippi River region ecUpsed all figures in the past. Favorable 

 weather conditions and varjdng water stages permitted the capture 

 of 182,534,861 stranded fishes, which were returned to the Mississippi 

 River and its tributaries and other near-by waters. Approximately 

 three tenths of 1 per cent of the total handled were utilized in filling 

 applications for stocking waters removed from the vicinity of the 

 rescue operations. 



Number and disposition of fish rescued, fiscal year 1931 



Locality and species 



All stations: 



BufEalofish_. _.. 



Carp 



Catflsb 



Crappie -_ 



Fiesh- water drum 



Largemouth black bass. 



Pike and pickerel 



Sunflsh 



White bass 



Yellow perch 



Miscellaneous 



Total. 



Summary by stations: 



Bellevue, Iowa 



Fail port, Iowa 



Homer, Minn 



La Crosse, Wis 



Lynxville, Wis 



Marquette, Iowa.. 



Total. 



Delivered 

 to appli- 

 cants 



Restored to 

 original wa- 

 ters 



240, 758 

 247, 415 



381,368 



275 



73, 068 



33, 538 



976, 422 



63, 173 



254, 985 

 79, 057 

 334, 272 

 244, 935 



976, 422 



103, 543 

 027, 800 

 966, 912 

 121,527 



14, 474 

 543, 366 

 813, 315 

 334, 066 



52, 768 

 990, 334 

 590, 334 



181, 558, 439 



881, 899 

 837, 720 

 124, 950 

 109, 363 

 709, 537 

 894, 970 



181, 558, 439 



Total num- 

 ber of fish 

 rescued 



12,103,543 



25, 027, 800 



83, 207, 670 



28, 368, 942 



14, 474 



924, 734 



813, 590 



11,407,134 



52,768 



2, 023, 872 



18, 590, 334 



182, 534, 861 



34, 945, 072 

 25, 837, 720 

 16, 379, 935 

 10, 188, 420 

 27, 043, 809 

 68, 139, 905 



182, 534, 861 



TRANSFERS OF EGGS BETWEEN STATIONS 



One of the principal advantages of a nation-wide propagation 

 agency is its ability to transfer suppHes of fish from a section of the 

 country where they are abundant to another section where depletion 

 is evident and where the species proposed for introduction would be 

 a desirable acquisition. Fishes of wide natural range often appear 

 in much greater numbers in some localities than in others. In such 

 cases shipments of the fish alive, or in the egg stage if possible, are of 

 great importance and value in the work of the bureau. Shipments of 

 eggs are also made for the purpose of introducing new strains in the 

 brood stock at the various hatcheries. 



