430 



BULLETIN OF THE BUREAU OF FISHERIES 



ends abruptly some distance in front of the tail. Haddock of this size show much 

 less pigment (p. 444). Cod fry of 15 to 30 mm. may be recognized by the location 

 of the vent under the second dorsal fin, combined with dense pigmentation. The 

 dorsal and anal fin rays begin to appear at a length of 10 to 13 mm.; at 20 mm. 

 they have attained their final number and the separate fins are outlined; while at 

 30 mm. the fry begin to show the spotted color pattern so characteristic of the cod. 



y 



Fig. 214.— Localities where cod (0) and haddock (A) larvae have been taken in the tow nets 



An important question for future solution is: What proportion of the cod 

 larvae hatched on the Gulf of Maine spawning grounds survive? We have no data 

 whatever to offer on this, nor do we think it wise to draw any conclusions from 

 the fact that we have taken few cod larva? in our tow nets (only SO or 90 all told), 

 because this may have been purely accidental, due to the fact that we have 

 made few hauls in Ipswich Bay or the southern part of Massachusetts Bay and 

 none on the offshore spawning grounds at the critical season. 



