UNITED STATES DEPARTMENT OF THE INTERIOR, Fred A. Seaton, Secretary 

 FISH AND WILDLIFE SERVICE, Arnie J. Suomela, Commissioner 



FLUCTUATIONS IN THE POPULATION OF 



YELLOW PERCH, PERCA FLAVESCENS 



(MITCHILL), IN SAGINAW BAY 



LAKE HURON 



BY SALAH EL-DIN EL-ZARKA 



FISHERY BULLETIN 151 



From Fishery Bulletin of the Fish and Wildlife Service 



VOLUME 59 



UNITED STATES GOVERNMENT PRINTING OFFICE . WASHINGTON . 1959 



For sale by the Superintendent of Documents, U. S. Government Printing Office 

 Washington 25, D. C. - Price 40 cents 



