86 



Part III.— Twenty -fourth Annual Report 



Tables fire also given showing the ratios which exist between the 

 weight of the fish and that of the reproductive organs at different periods, 

 and also those existing between the more important constituents of 

 muscles and genitals. 



Loch Fyne Herring, May 10, 1906. 



(Otter.) 



Length. 



Girth. 



Weight. 



Condition 



-Cm. 



Cm. 



Gin. 





25 



Hi 



113 



Very immature, probably 



23| 



11 



101 



previously spent her- 



22j 



12 



104 



ring from condition 



23j 



11 



102 



of ovarian capsule. 



23 



10J 



93 



There were large num- 



23 



10 



90 



bers of very small 



23 



lOj 



88 



ova present, varying 



211 



lOj 



80 



in size from "07- 



22-1 



io| 



85 



'15 mm. 



22 



10 



80 





m 



10 



74 





22 



10 



75 





22 9cm. 



107cm. 



90'4gm. 



Average. 



Weight of genitals (fresh) of 12 herrings, 2-5 grammes. The water 

 percentage of these genitals was 71*52. 



Analyses of the muscles of these herring : — 

 Females — 



(a) Amounts stated in percentages of fresh material. 



In grammes Water. Proteid. Fat. P<;0 6 



percent. 72-69 18'98 7*25 -68 



(b) Grammes in the total muscles of the average fish of this 



series. 



Proteid. Fat. P 2 0 6 



In grammes, . . 11'38 4-35 -40 



Ardrishaig, May 11, 1906. 



These herring were very small, and, with one exception, contained very 

 immature ovaries. One herring (No. 11) contained ovaries which 

 weighed 14-75 grammes, and the ova which were present measured l'2mm. 

 in diameter and were being discharged. 



The immature ovaries, although they contained large numbers of very 

 .small ova, were evidently comparatively recently spent (see following- 

 pages for measurements and analyses). 



