\ 



^■i- 



PROGRESS IN BIOLOGICAL INQUIRIES, 1934 ' 



By Elmer Higgins, Chief, Division of SHenlific Inquiry 

 [With the collaboration of Investigators] 



CONTENTS 



Page 



Introduction 332 



Cooperative investigations 334 



Publications 335 



North and Middle Atlantic fishery investigations 337 



Haddock 338 



Mackerel 334 



Cod 346 



Flounders 347 



Species in need of attention 348 



Shore fishes of the Middle Atlantic States 349 



Fishery investigations of the South Atlantic and Gulf coasts 354 



Investigation of the spawning habits, larval development, and rate 



of growth of fishes 354 



Survey of the fresh waters of Mississippi 354 



Marine fishes of the Gulf coast 354 



An investigation of the fishes and fish cultural possibilities of the 



fresh waters of Puerto Rico 354 



Shrimp investigations 355 



Pacific coas t and Alaska fishery investigations 359 



Columbia River salmon investigation 359 



Puget Sound sockeye salmon investigation 360 



Washington coho salmon investigation 361 



Statistical stud}^ of salmon fisheries in Puget Sound region 362 



Karluk River red salmon investigation 363 



Chignik River red salmon investigation 364 



Bristol Bay red salmon in vestigation 364 



Pink salmon investigation 364 



Herring investigation 366 



Investigation concerning the protection of migratory fish at the 



Bonneville Dam 368 



Gteat Lakes fishery investigations 369 



Fisherv statistics 369 



Pike-perches 369 



Yellow perch 371 



Other outstanding problems 371 



Uniform regulation and depletion 371 



Oyster investigations 372 



Experiments on oyster culture 372 



Oil pollution investigations in Louisiana 374 



Biology and cultivation of hard-shell clam {Venu^ mercenaria) 375 



Rehabilitation of public oyster beds in North Carolina 376 



Investigation of oysters at New River, N. C 377 



Oyster investigations in Florida 377 



Protozoan parasite of Virginia and Louisiana oysters 378 



Oyster investigations in Washington 379 



^Administrative Report No. 21, Appendix III to the Report of the U. S. Commissioner 

 of Fisheries tor 1935. Approved for publication, Nov. 7, 1935. 



331 



