Figure 13. — Six stages in the seasonal changes in the ovary of gizzard shad. 



lift most of the gizzard shad were caught in that 

 portion of the net that crossed the highest area of 

 the bar, and fewer at the ends of the nets where 

 they sloped gradually into deeper water. 



The conditions described here must not be 

 taken as the only ones under which gizzard shad 

 may spawn. Although 1 have little information 



on possible shad spawning in the lake, and have 

 never taken shad eggs in plankton nets in the open 

 lake, gill nets and trap nets sometimes have had 

 eggs of gizzard shad and other fish adhering to 

 them during the spawning season. The females 

 may have forced spawn from themselves during 

 their attempts to escape from the gill nets or they 



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U.S. FISH AND WILDLIFE SERVICE 



