TABLE 7. CORRELATIONAL DEPENDENCE BETWEEN LENGTH AND FECUNDITY 

 OF SUMMER-SPAWNING HERRING. 



From the data of Table 10, it can be seen that the relation of the wei|^t of the roe to the 

 body weight increases in the large specimens. In fish 290-300 cm. long, the proportion is 16%, 

 in the largest specimens it is 20%. 



A macroscopic examination of the ovaries and the dimensions of the eggs leads one to con- 

 clude that, like all marine herrings of the genus Clupea , the summer -spawning herring does not 

 have portional maturing. 



The ovaries of the summer herring are fairly fine, the diameter of the individual eggs 

 varying from . 8 to 1 . 1 mm . Table 1 1 gives a comparison of the diameter of the eggs of the 

 summer -spawning and spring- spawning herrings. The average diameter of the eggs of the summer- 

 spawning herring is less than 1 mm. , while that of the spring- spawning herring is greater than 1 

 mm. 



A count of 1 gram of ovary taken from a herring In the stage near to reproduction (V and 

 V-VI) established that the minimum number of eggs is 1, 230, the maximum 3, 710 and the average 

 2, 300. A count of 1 gm. for the spring Atlantic herring, also in the stage approaching reproduction, 

 gives the minimum number of eggs as 620, the maximum as 3, 080 and the average as 1, 315 eggs. 



Table 12 gives an idea of the number of eggs in a 1 gm. sample. 



One gram of ovaries from the summer herring holds on the average about 2, 500 eggs, 

 while the average for the spring herring is about half of this --1, 300 eggs. 



183 



