of the Fishery Board for Scotland. 



97 



7| pairs of spent ovaries were taken from herrings sent at this time, 

 and were found to weigh 9*51 grammes. These were dried and analysed. 



I. — Muscles. 



(a) In percentages. 

 Water. Proteid. 

 78-97 18-05 



(b) Per average fish. 



Proteid. 

 16-60 

 II. —Ovaries (spent). 



(a) In percentages. 

 Water. Proteid. 

 82-07 3-78 



(b) Per average fish. 



Proteid. 

 •29 



Fat. 

 0-68 



Fat. 

 0-62 



Fat. 

 11-83 



Fat. 

 •09 



P 2 0 5 

 •73 



p 2 o, 



0-66 



P 2 0 5 

 •91 



p 2 o 5 



•016 



Before discussing these results it will prove of some advantage to com- 

 pare the ratios which exist between the weight of the fish and the weight 

 of the ovaries, as well as certain other ratios. 



Ratio of Weight op Fish to Weight of Ovartes at 

 Different Seasons : — 



District and Period. 



Weight 

 of 

 Fish. 



Weight 

 of 



Ovaries. 



Condition. 



Loch Fyne — May 10, 



,, May 11— Series A, 



,, May 11— Series B, 



July 29, . 

 ., Sept. 15, . 



,, Oct. — Series A, . 



Oct.— Series B, . 

 ,, Nov. 6, 



Helmsdale — Dec. 6, 

 Loch Fyne— Dec. 13, . 

 Lochboisdale — Dec. 28 — Series 

 „ Dec. 28— Series 



Feb. 8, . 



A, . 



B, . 



434-6 

 301-6 

 6-1 

 224-2 

 84-2 

 60-2 

 20-8 

 8-9 

 6-3 

 6-3 

 85 

 Spent. 



1 

 1 

 1 

 1 

 1 

 1 

 1 

 1 

 1 

 1 

 1 



Spent. 



Immature. 

 Immature. 

 Mature. 

 Immature. 



Immature (Ova , 15-45mm.). 

 Immature (Ova -28mm.). 

 Immature (Ova •59mm.). 

 Almost mature (Ova *8 1mm.). 

 Almost mature (Ova '8-1 "2mm. ). 

 Mature (Ova '9-1 -2mm.). 

 Spawning. 

 Spent. 

 Spent. 



Ratio of Proteid to Fat in the Muscles and Ovaries respectively : — 



District and Period. 



Muscles. 



Ovaries. 



Condition. 





Proteid : 



Fat. 



Proteid : Fat, 





Loch Fyne— May 10, . 



2-61 







Immature. 



May 11— A, . 



3-00 







Immature. 



May 11— B, . 



5-84 







Mature. 



July 29, . 



2-48 





1-51 : 1 



Immature. 



Sept. 15, . 



1-63 





2-57 : 1 



Immature (Ova '15--45mm.). 



„ Oct.— A, . 



0-89 





6-82 : 1 



Immature (Ova 28mm.). 



Oct.— B, . 



1-16 





4-67 : 1 



Immature (Ova 59mm.). 



,, Nov. 6, . 



1 83 





8-78 : 1 



Almost mature t^Ova -8-lmm. ). 



Helmsdale — Dec. 6, 



8-36 





8-31 : 1 



Almost mature (probably 

 about to spawn). 



Loch Fyne— Dec. 13, . 



2-51 





8-9 : 1 



Mature (about to spawn). 



Lochboisdale— Dec. 28 — A, . 



9-36 





6-65 : 1 



Spawning. 



, Dec. 28— B, . 



1270 







Spent. 



Feb. 8,. . 



26-54 



1 



312 : 1 



Spent. 



G 



