ABSTRACT 



The fish collected by the Bureau of Commercial Fisbeiies' M/V Cisco from Saginaw 

 Bay in 1956 yielded no new species records but provided many new locality rectudt within 

 the Bay. The collections included representatives of 47 species; 74 species are known to 

 occur in the Bay. 



Records from trawling in June -October provided information on seasonal distributl(» 

 and movements of alewives, smelt, and yellow perch. Young (O group) alewlves were 

 first taken in shallow water (2-7 1/2 fathoms) in September and were extremely plentiful 

 in October; small catches were made in deep water (8-25 fathoms) in October. Older 

 alewives were most plentiful in the shallow water of the inner part of the Bay in August. 

 Few were taken at any depth in other months. 



Young-of -the -year smelt were first taken in July and were subsequently plentiful in 

 shallow water; good catches were made in deep water in October. Older smelt were 

 abundant in shallow areas in June and October but scarce in other months; good deep- 

 water catches were taken in August. 



The only substantial catch of O -group yellow perch was made in the shallow water 

 of the inner part of the Bay in October. Larger perch were cau^t in hi^ly variable, 

 but usually substantial numbers in shallow water in all months of fishing; moderate num- 

 bers were caught in deep water in August, and the largest catches at any time or depth 

 were in deep water in October. 



