107 . 



70 , 



50 .. 



-p 



+> 



+> 



^-1 

 o 



« 



30 .. 



20 



10 



Solid histogram: Northern area 



Dotted histogram: Middle area 

 Hatched histogram: Southern area 



Fillets 



Examined Infected 



805 316 



414 88 



375 56 



a 



iiLi I ■ 1 1 . 1 



10 15 



20 



25 



38 



30 



Number of Parasites Occuring in Fillets Examined 

 Figure 3.--Freauency distribution of parasites in Sebastodes alutus. 



sample of 414 fillets from 20,000 pounds 

 of perch was inspected. The data ob- 

 tained are shown In table 1 and figure 3. 



A mixed catch of rockfish (exclud- 

 ing S. alutus) landed at Bellingham was 

 inspected. The catch consisted of 7, 000 

 pounds, from which 83 fillets were ex- 

 amined. The data obtained are shown 

 in table 1 and figure 4. 



A catch of S. pinniger landed at As- 

 toria but caught in the middle region 

 also was examined. A sample of 108 

 fillets from the landing of 6,000 pounds 

 was inspected. The data obtained are 

 shown in table 1 . Seven of the eight 

 parasitized fillets found contained only- 

 one parasite, while the remaining fillet 

 contained two. 



