Subjects 



D 



DDT: 



effect on fish. Cir 11, 15; PFC, v.lO, no. 3 C 



effect upon the Chesapeake Bay blue crab. 

 Sep 114 



effects of aerial application on fish and 



fish-food organisms. PFC, v. 11, no. 4 B 



effects of feeding DDT- sprayed insects to 

 fresh-water fish. SSR-F 3 



effects of various concentrations on 



several species of fish of different 

 sizes. SSR-F 4 



insecticides, in the fishery industry. FL 146 



investigations by Fish and Wildlife Service, 

 1946. SSR 41 



Daphnia: 



description and culture. FL 331; PFC 17 A 



pollution, its nature and evaluation. PFC, 

 V.16, no. 2 B 



use in fish ponds. PFC 47 A 



Darters: 



new genus from western North Carolina. 

 Doc 1004 



Dealers ( See also Canners; Manufacturers; and 

 Producers): 

 fishery products, 



Alabama. SL 17, 43 



Arkansas. SL 41 



California. SL 2 1 



Connecticut. SL 5 



Delaware. SL 9 



Florida, SL 16 



Georgia. SL 15 



Illinois. SL 2 6, 35 

 Indiana, SL 27 

 Iowa. SL 36 

 Kentucky. SL 42. 

 Louisiana. SL 19 

 Maine. SL 1. 



Maryland. SL 10 

 Massachusetts. SL 3 

 Michigan. SL 28 

 Minnesota, SL 24, 32 

 Mississippi. SL 18 

 Missouri. SL 38 

 New Hampshire. SL 2 

 New Jersey. SL 7 

 New York. SL 6, 31 

 North Carolina. SL 13. 33. 

 Ohio. SL 29 

 Oklahoma. SL 40 



Oregon. SL 22 

 Pennsylvania. SL 8, 30 

 Rhode Island. SL 4 

 South Carolina. SL 14 

 Tennessee. SL 39 

 Texas. SL 20 

 Virginia. SL 12 

 Washington. SL 23 

 Wisconsin. SL 25, 34 



trout and pondfishes. FL 46 



Deep Sea ( See Vessels, fishing and research). 



Dehydration of fishery products ( See Fishery 

 products). 



Delaware , experimental trawler (See Vessels, 

 fishing and research). 



Demonstrations (See School lunch program). 

 Depth recorder ( See Echo sounders). 

 Dermatitis ( See Fish poisoning). 

 Derris root: 



Cobequid hatchery. PFC 38 B 



powdered, to sterilize hatchery water 

 supplies. PFC 48 D 



wetting agent added to attain suspension. 

 PFC. V.13, no. 3 H 



Dichlorophenoxy acetic acid ( See Vegetation, 

 submerged). 



168 



