FISHERY BULLETIN: VOL. 71, NO. 1 



Figure 4. — 8 July 1969. Photomi- 

 crograph of wild herring blood show- 

 ing one of the largest inclusions seen 

 in this study. The inclusion mea- 

 sures 3.9 X 3.6 II, the cell nucleus 

 4.7 X 3.7 li, and the cytosome 9.2 

 X 8.0 M- 



I 



• • ii 





%f 





• I 



* #. 





>t:.^ 



% 



# 



r 



• 



# 



% 







(ft < 



Figure 5.-22 July 1969. Photomi- 

 crograph of herring blood from a 

 short-term captive, 2 weeks after 

 placing wild fish from the 8 July 

 sample in the tanks, showing nearly 

 all of the red cells affected with in- 

 clusions, abnormal nuclei, and anu- 

 cleated "balloon" cells. 



sampled on 16 July from Deer Island^ N.B., Can- 

 ada. One herring had 25% immature red cells 

 with inclusions in less than 1% of the imma- 

 tures; the other affected herring had 90% im- 

 mature red cells with inclusions in 1% of the 

 immature and 90% of the mature red cells. The 

 morphology and size of inclusions were similar 

 to that of the 8 July samples from Boothbay 

 Harbor. The smear with the greatest incidence 



of inclusions showed approximately 20% bal- 

 loon cells. 



HEMATOCRITS 



The hematocrit mean, standard deviation, and 

 range for each sample and hematocrit values of 

 the males and females in each sample are shown 

 in Table 3. The lowest hematocrit for an indi- 



130 



