C.4,V.4r>//l.V FISHERIES EX fEfHTIOS , 1011,-1'') 



11 



Fig. 7. 



It would seem that the mackerel here when spawning keep to the shallower waters 

 in towards Prince Edward Island. It is also interesting to note that while the first 

 stations on the first cruise of the Princess inside and west of Prince Edward Island 

 furnished purely arctic species, the hauls made a week laten. on the eastern side of the 

 island, brought up the first mackerel eggs. 



The mackerel's spawning season appears to extend over a considerable period, 

 from middle of June (first cruise of the Pnn-cess) to some way on in August. 



The size of the mackerel ova will be seen from the table; it will be noted that the 

 diameter varies greatly, a phenomenon which is also well-known in European waters. 



Princess. Princess. Priticess. " 33." 



MM. Station 26. Station 30. Station 31. Station 29. 



1-00 • 23 



1-05 9 47 



1-10 Ifi 34 - 1 



1-1.5 1 1 1 4 



1-20 8 12 



1-25 11 8 



1-30 5 .... 



The diameter of the oil globules was about 0-03 mm. 



