PROGRESS IN BIOLOGICAL INQUIRIES, JULY 1 TO DECEMBER 



31, 1924^ 



By Willis H. Kich, Axsixtant in Charge of Scientiftc Inquiry 



CONTENTS 



Introduction '{T 



Investigations of fish and fisheries 40 



Atlantic coast 40 



Life histories and migrations of cod, pollock, and haddock 40 



Fishes of the South Atlantic coast 43 



Salmonid;e and smelts • 40 



Larval fishes 46 



Tropical fishes of the Woods Hole region 47 



Chesapeake Bay 48 



North American Committee on Fishery Investigations 48 



Interior waters 49 



Coregoninse of the Great Lakes 49 



Pacific coast and Alaska 50 



Alaska salmon 50 



Salmon of the Pacific Coast States 51 



Fishei'ies of California 52 



Fishes of El Salvador 52 



Investigations of shellfish and terrapin 52 



Oysters 52 



Alaska clams 54 



Fi-esh-water mussels 55 



Tei-rapin 55 



Ecological and oceanographic studies 56 



Control of mosquitoes by means of fish 56 



Oceanography 56 



Ecology of fresh-water lakes 57 



Fouling of ships' bottoms 58 



Investigations pertaining to fish-cultural operations 59 



Pathology of fishes 59 



Physiology and nutrition of fishes 61 



Biological laboratories 63 



INTRODUCTION 



Because of the fact that ahnost all of the scientific investigations 

 undertaken by the Bureau of Fisheries are conducted durino; the 

 summer months, so tliat th y are begun before the end of one fiscal 

 year and are conckided some time during the next succeeding fiscal 

 year, it has been decided to change the jilan of issuing aninuil re- 

 ports on such investigations so that an entire season's work may be 



1 Appendix III to the Report of the U. S. Commissioner of Fishei-ies for 3 925. B. F. 

 Doc. No. 090. 



37 



