FISHERY BULLETIN: VOL. 72, NO. 4 

 Table 4. — Some meristic characters oflarval andiuvenileHarengulajaguana 



Standard 

 length 

 (mm) 



Caudal 

 rays 



Dorsal 

 rays 



Anal 

 rays 



Pectoral 

 rays 



Pelvic 

 rays 



Standard 

 length Caudal Dorsal Anal Pectoral Pelvic 



(mm) rays rays rays rays rays 



fins. Rayless pectoral fins were present soon after 

 hatching, but rays usually did not develop until 

 larvae were 15.0 to 16.0 mm. One specimen 

 had some pectoral rays at only 11.9 mm, but this 

 was unusual. Full complements of 14 to 16 

 pectoral rays were attained at 18.5 to 19.5 mm. 

 Pectorals were the last fins to complete develop- 

 ment. Pelvic fins first appeared as buds when 

 larvae were 11.0 to 12.0 mm; most specimens 

 had pelvic buds at 11.3 mm. Pelvic rays usually 

 began to develop at 13.0 to 14.0 mm, but one 

 11.7-mm specimen had rays. A full complement 

 of 7 or 8 (usually 8) pelvic rays was present 

 at 14.6 to 17.8 mm. Most specimens had complete 

 pelvic fins by 15.5 mm. 



Scales 



Scale development apparently occurred at 21 

 to 22 mm. No specimens from 18.5 to 21.2 mm 

 were scaled. The illustrated specimen 21.3 mm 

 (Figure IOC) was fully scaled as were 4 speci- 

 mens from 22.4 to 24.2 mm. 



Osteological Development 



Sixteen cleared and stained specimens pro- 

 vided a record of sequence of development of 

 skeletal structures in scaled sardine larvae. Bones 

 stain as a result of calcification, but many 

 bones, though unstained, were discernible before 



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