SEA-FISHERIES LABORATORY. 



219 



miles from the coast. On April 1st the isopykn of 1,021 

 was at a depth of 18 m. ; on April 14th, at 8 m. ; on May 

 3rd at the surface and on May 23rd at 8 m. again. 



Along with these great changes of the surface layers 

 in the fiords great changes were also observed in the 



.Scale For 



3Zr77\\\Acxrv(A 

 Unrated, 



Ultim 



april 



oty 



number of cod larvae, as mentioned above, and also in 

 the number of other fish larvae. The above diagram 

 shows the relation between the rise and fall of salinity, 

 the isopykn of 1,021 and the average number of cod larvae 

 per haul in the Sondeledfiord on the four occasions 

 mentioned on page 215. (See Fig. 5.) 



