of the Fishery Board for Scotland. 



35 



Among the Clyde specimens the larger herrings were, on the whole, 

 farther advanced than the smaller. Thus the herrings 18-27 cm. had eggs 

 ■05-*8 mm. in diameter, while those measuring from 28 to 33 cm. had eggs 

 •3-.7, 1-2 mm. in diameter. The East Coast herrings were much fewer in 

 number than those from the Clyde. 



It is evident that in both regions there will be spawning spread over a 

 long period, and, so far as can be judged, a considerable amount of spawning 

 should occur during autumn, bridging the interval between the summer 

 and winter spawnings. The winter spawning herring will probably require 

 a longer time for the eggs to ripen. Thus those herrings which have eggs 

 *3 mm. in diameter will probably spawn during the autumn, while those 

 herrings in which the ovaries are in the resting condition of, say, the winter 

 spents, and having eggs *15 and -2 mm. in diameter, will not likely spawn 

 till February. 



Herrings from Clyde and East Coast. 



Length. 



Range of 

 "Weight. 



Weight of 

 Reproductive 

 Organs. 



Breadth of 

 Reproductive 

 Organs. 



Diameter of Eggs. 



cm. 



grammes. 



grammes. 



mm. 



mm. 



18 



50, 53 





2 



•1 



19 



45,66 





2-5 



•15--3 



20 



46-83* 



•3 



2-8 



•15--3 



21 



66-102* 



■1--8 



2-5 



•1--35 



. 22 



63-109* 



•1-10 



2-20 



•1--5 



23 



84-126 



•5-18 



2-25 



•05--6 



24 



103-154 



•3-24 



2-26 



•1--5, -7, -8 



25 



107-162 



<l-28 



2-5-30 



•15-10 



26 



128-176 



•5-36 



3-31 



•15-1-0 



27 



143-185 



<l-27 



5-25 



•2 --9 



28 



152-194 



•6-26 



6-27 



•3--5, -8, -9 



29 



172-220 



1-19 



8-25 



•35--5, -7, 1-0, 1-2 



30 



205, 214 



1-7,3 



7-26 



•3--6 



31 





8-30 



•4-6 



32 







10-30 



•4-7 



33 







13-25 



•5, -6 



35 



216 





16 





* Had been in formaline. 



August. 



Clyde. — Campbeltown, Arran Shore, 10th August 1907: — 59 W. Spt., 



21 to 27 cm. : eggs, -15--45 mm. : o, 2*5-8 mm. : t, 2-10 mm. : fat, great 

 quantity. With one or two exceptions, which had empty stomachs, the 

 herrings contained large quantities of food (copepods and schizopods). 



Clyde. - Between Lamlash and Ardrossan, 31st August 1906: — 10 

 Imm., 20 to 23 cm. : eggs, -15 mm. : o, 3 mm. : t, 2, 2*5 mm. : fat, large 

 quantity; 38 Tmm. dev., 20 to 24 cm. : eggs, 2-*6 mm. : o, 3-9 mm: t, 

 3 - 10 mm. : fat, large quantity; 36 W. Spr., 20 to 25 cm. : eggs, • 15-*55 

 mm. : o, 3- 11 mm. : t, 5 - 16 mm. : fat, large quantity, some; 8 W. Spt., 



22 to 25 cm. : eggs, '1, -3 mm. : o, 4-6 mm. : t, 12, 13 mm. : fat, much. 

 Some of the stomachs had remains of food ( Crustacea). 



