Table 5. — Development of spines in the head region of Hemilepidotus zapus larvae. Specimens below the dash- 

 ed line have completed notochord flexion. 



Size 



interval Sample 



(mm SL) size Parietal 



Nuchal 



Preoper- 

 cular 



Oper- 

 cular 



Post- 

 ocular 



Superior 

 infra- 

 orbital 



Nasal 



'Specimens In this size group did not accept alizarin stain. 



^Spines are beginning to fuse at base but points can still be observed. 



^Spine(s) reduced in size. 



JAIMUARY-MARCH 



6.7-11.0 mm SL (n=21) 



- 62 OOM 



60 00 



S8 00 



- 56 00 



- 54 00 



I- 52 00 



180 00 



170 OOW 



160 00 



Figure 4. -Occurrence of Hemilepidotus zapu>< larvae in the 

 eastern Bering Sea: A) January-March (IMF80 and MF7801); B) 

 April-May (MF77B5(6)); C) June-July (2MF79). Closed circles in- 

 dicate neuston stations and closed diamonds indicate bongo stations. 

 Station data on file at the Northwest and Alaska Fisheries Center, 

 Seattle, WA. 



APRIL-MAY 



12.2-16.7 nnmSL (n=29) 



JUNE-JULY 



18.0-22.0 mm SL {n=8) 



62 OON 



60 00 



- 58 00 



56 00 



54 00 



- 52 00 



160 00 



180 00 



62 OON 



60 00 



58 00 



56 00 



- 54 00 



- 52 00 



160 00 



456 



