FISHERY BULLETIN: VOL. 70, NO. 1 



Table 4. — Numbers of eggs in right and left ovaries 

 from coho salmon collected at the outlet to Karluk Lake, 

 1966. 



Sample 

 number 



1 



2 



3 



4 



5 



6 



7 



8 



9 



10 



11 



12 



13 



U 



15 



16 



17 



18 



19 



20 



21 



22 



23 



24 



25 



26 



27 



28 



29 



30 



31 



Average 



Mideye-fork 

 length (cm) 



Number of eggs 



Righl 

 ovary 



50.9 

 61.4 

 65.0 

 56.9 

 62.7 

 65.6 

 69.8 

 64.7 

 62.6 

 60.2 

 59.3 

 60.2 

 62.3 

 61.2 

 60.1 

 63.5 

 64.5 

 67.2 

 60.2 

 65.2 

 64.0 

 65.1 

 66.0 

 62.9 

 65.8 

 64.6 

 63.6 

 66.7 

 63.1 

 61.9 

 64.8 



1,640 

 2,265 

 3.005 

 2,213 

 2,322 

 3,001 

 3,559 

 2,258 

 2,546 

 2,433 

 2,243 

 2,331 

 2,481 

 2,620 

 2,067 

 2,581 

 2,473 

 2,604 

 2,044 

 2,824 

 2,608 

 2,491 

 2,926 

 2,266 

 3,047 

 2,726 

 2,721 

 3,104 

 2,981 

 2,176 

 2,340 



Left 

 ovary 



1,403 

 1,918 

 2,876 

 2,083 

 2,337 

 3,147 

 3,347 

 1,884 

 2,501 

 2,220 

 2,225 

 2,161 

 2,283 

 2,539 

 2,000 

 2,221 

 2,546 

 3,233 

 1,813 

 2,697 

 2,659 

 2,501 

 3,174 

 2,280 

 2,878 

 2,579 

 2,563 

 2,997 

 2,843 

 2,125 

 2,521 



Total 



3,043 

 4,183 

 5,881 

 4,296 

 4,659 

 6,148 

 6,906 

 4,142 

 5,047 

 4,653 

 4,468 

 4,492 

 4,764 

 5,159 

 4,067 

 4,802 

 5,019 

 5,837 

 3,857 

 5,521 

 5,267 

 4,992 

 6,100 

 4,546 

 5,925 

 5,305 

 5,284 

 6,101 

 5,824 

 4,301 

 4,861 



63.0 



2,545 



2,469 



5,015 



48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 



MIOEyE-FORK length Icm) 



Figure 5. — Relation of mean egg diameter to mideye- 

 fork length of female coho salmon, Karluk River, 1966. 



length of the fish. Allen (1958) in his studies 

 of coho salmon in Green River, Wash., also found 

 no relation. 



The average diameters of eggs were plotted 

 against number of eggs in individual fish to de- 

 termine if a relation existed between the fecun- 

 dity of a female and the size of her eggs (Figure 

 6). For 24 females, the egg diameter ranged 



RELATION OF EGG SIZE TO LENGTH 

 AND TO FECUNDITY 



The average diameter of eggs obtained from 

 the fecundity samples from Karluk River was 

 plotted against the length of the female coho 

 salmon from which the samples were taken ( Fig- 

 ure 5) to determine if there was a relation be- 

 tween the size of a female and the size of her 

 eggs. The size of eggs increases as they mature, 

 and so the eggs used had to be in the same stage 

 of maturation. I therefore selected only females 

 beginning to show secondary sexual character- 

 istics and containing eggs that could not be 

 readily expressed from the body cavity. For 25 

 females the eggs varied in size from 4.92 to 

 6.88 mm. (mean 6.11 mm) ; lengths varied from 

 50.4 to 69.8 cm (mean 62.0 cm). No relation 

 was found between the size of the egg and the 



1,600 2;600 3,600 4;600 5^00 6,600 



NUMBER OF ECGS 



7,600 



Figure 6. — Relation of mean egg diameter to number of 

 eggs in female coho salmon, Karluk River, 1966. 



86 



