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



— 30 



E 

 E 



.y 



20 25 30 



TOTAL LENGTH (mml 



Figure 1. — Relation between standard length and total length 

 for larvae of Harengula jaguana. 



38.7 mm, which falls within the range of varia- 

 tion in head lengths reported for juvenile and 

 adult H. pensacolae pensacolae (Rivas, 1950). 



Eye Diameter 



Eye diameters averaged 4.0 to 4.5% SL for 

 specimens 4.2 to 12 mm (Table 1, Figure 4). 

 A rapid increase in eye diameters from 4.3 to 

 7.39c SL occurred in specimens 12 to 22 mm. 

 Eye diameters on specimens longer than 22 mm 

 varied, but no increasing trend relative to stan- 

 dard length was observed. A 38.7-mm specimen 

 had an eye diameter of 7.8% SL. Eye diameters 

 were variable for larvae of a given length (Figure 

 4); for example, at 12 mm, eye diameters varied 

 from about 3.5 to 5.5% SL. Rivas (1950) and 



hatching and increased to about 90% SL when 

 larvae were 12 mm (Table 1, Figure 2). A 

 gradual decrease in preanus length occurred in 

 larger larvae. At 22 mm, preanus length was 

 76% SL; juveniles 28 to 32 mm had preanus 

 lengths that averaged 75% SL. Decreasing pre- 

 anus length in larger larvae was caused by 

 shortening of the gut during transformation to 

 the juvenile stage. 



Head Length 



Head length increased relative to standard 

 length from 12% at 4.2 mm to 26% at 22.0 mm 

 (Table 1, Figure 3). The ratio was constant at 

 25 to 26% SL for specimens between 22 and 



+ = PREPELVrC LENGTHS 



•■ HEaO LENGTHS 





..^^^* 



,r'*' 



ii- >■■ 



12 16 20 24 2B 



STANDARD LENGTH (mm) 



Figure 3. — Relation of head length and prepelvic length to 

 standard length for larvae oi Harengula jaguana. 



5 200 



PREANAL LENGTHS 

 PREDORSAL LENGTHS 



/ 



J* 



STANDARD LENGTH (mml 



O 

 Q 6 



 BOOT DEPTH 



 EYE DIAMETER 





16 20 24 28 



STANDARD LENGTH (mm) 



Figure 2. — Relation of preanal length and predorsal length 

 to standard length for larvae of Harengula jaguana. 



Figure 4. — Relation of eye diameter and body depth to standard 

 length for larvae of Harengula jaguana. 



1109 



