SHERBURNE: ERYTHROCYTE DEGENERATION IN HERRING 



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Figure 6. — 22 July 1969. Photomi- 

 crograph of normal red cells from the 

 only herring not affected with inclu- 

 sions from a sample of 25 short-term 

 captives. 



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% 



Figure 7. — 21 August 1969. Photo- 

 micrograph of abnormal cells in 

 short-term captive herring. Higher 

 than normal natural seawater tem- 

 peratures of up to 20.5°C (68.9°F) 

 during August may account for the 

 abnormal cells in herring not affected 

 with inclusions. This herring had 

 one of the lowest hematocrits of the 

 sample (21 volumes percent) ; the 

 scarcity of cells on the slide reflects 

 this finding. 







% 



■#* 



I 



i 



vidual herring in this study was 17 volumes per- 

 cent; the highest, 54.5 volumes percent. The 

 lowest mean hematocrit for a sample was 28.7 

 volumes percent for the long-term captives in 

 March; the highest mean hematocrit was 41.4 

 volumes percent for a sample of wild herring in 



July. The i-test analysis revealed no significant 

 differences in hematocrit values between sexes 

 in these immature herring. 



A consistent decrease is evident in the mean 

 hematocrit values of the wild herring from the 

 time they were placed in captivity on 8 July 



131 



