HOUDE. RICHARDS, and SAKSENA: EGGS AND LARVAE OF SCALED SARDINE 





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Figure 10. — Larvae of Harengula jaguana: A, 16.1 mm SL; B, 18.8 mm SL; C, 21.3 mm SL. 



sides of most larvae between 16 and 17 mm. 

 The first of these developed posterior to the 

 dorsal fin along the lateral midline of larvae. 

 Numbers increased as larvae grew, spreading 

 anteriorly, dorsally, and ventrally so that most 

 individuals had numerous melanophores scat- 

 tered over their sides by 22 mm. The epaxial 

 myomeres of specimens longer than 22 mm usu- 

 ally were outlined by melanophores that were con- 

 centrated along the myosepta. Silver coloration 

 began to appear along the ventral and ventro- 

 lateral areas of the trunk at 22 to 24 mm. By 

 28 mm few melanophores could be discerned 

 below the midline on sides of juveniles because 

 of the accumulation of guanine in that area. 



At this stage, scaled sardines resemble large 

 juveniles and adults because of their predomi- 

 nantly silver color. 



Caudal Region 



Newly hatched larvae, 4 to 4.5 mm, had three 

 or four melanophores along the dorsal tip of the 

 notochord. In the first 48 h after hatching, the 

 number of melanophores in that area ranged 

 from three to six. During the same time from 

 one to three melanophores developed along the 

 ventral tip of the notochord in some specimens. 

 As caudal rays began to develop at 8 to 10 mm, 

 pigment migrated from the notochord tip to the 



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