PROGRESS IN BIOLOGICAL INQUIRIES, 1933 



By Elmer Higgins, ChicJ, Division oj Scientific Inquiry 

 (With the collaboration of Investigators) 



CONTENTS 



Page 



Introduction 314 



State cooperation 316 



Publications 317 



North and Middle Atlantic fishery investigations 320 



Haddock 321 



Mackerel 326 



Cod 328 



Flounders 329 



Shore fishes of the Middle Atlantic States 329 



Improvement of investigational service 334 



South Atlantic and Gulf fishery investigations 335 



Investigation of the spawning habits, larval development, and rate of 



growth of fishes 335 



A survey of the fresh waters of Mississippi 335 



Marine fishes of the Gulf coast 336 



Shrimp investigations 336 



Pacific coast and Alaska fishery investigations 340 



Karluk red-salmon investigation 341 



Chignik red-salmon investigation 342 



Bristol Bay red-salmon investigation 343 



Puget Sound sockeye investigation 343 



Pink salmon investigation 344 



Herring investigation 345 



Investigations concerning the protection of migratory fish at power 



dams on the Columbia River 347 



Great Lakes fishery investigations 348 



Fisheries statistics 349 



Pike-perches 350 



Yellow perch 351 



Cooperative investigations, interior lakes of Wisconsin 352 



Oyster investigations 353 



Growth and fattening of oysters 353 



Prediction of setting in Long Island Sound 354 



Propagation of diatoms for artificial feeding of oysters 354 



The use of slag in oyster culture 355 



Oyster planting in North Carolina 355 



Oj'ster investigations in Florida 356 



Oil pollution investigations in Louisiana 356 



Experimental studies in oil-well pollution 357 



Oj'ster investigations in Washington 358 



Investigations on aquiculture 359 



Pond-fish culture 359 



Trout culture 361 



Fish diseases 367 



Cooperative studies of the nutritional requirements of trout 368 



Limnological investigations in the Rocky Mountain region in the interest of 



fish stocking 372 



Quantitative food studies in mountain streams . 373 



Cooperative investigations 373 



' Appendix III to the Report of the U.S. Commissioner of Fisheries for 1934. Approved for publication, 

 June 7, 1934. 



313 



