JOHNSON 



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and LOESCH: MORPHOLOGY AND DEVELOPMENT OF AMERICAN SHAD 



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T" 



6 



- r 

 10 



- r - 



u 



-I — 

 22 



18 22 26 



Notochord - Standard Length (mm) 



— i 

 30 



FIGURE 6. — Scatterplot of TL/SL for larval A/osa sapidissima. Regression equation: 

 In (SNTL) = In 2.31 + 2.01 ln(SL):r ; = 0.964. 



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 E 



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14 



— i — 

 18 



— i — 

 22 



— i — 

 26 



— i 

 30 



Notochord - Standard Length (mm) 



FIGURE 7. — Scatterplot of BD/SL for larval Alosa sapidissima. Regression equation: 

 In (BD) = In 4.91 In + 2.14 In (SL):r 2 = 0.977. 



from a mean of 33.9-21.0 for the larvae examined (N 

 = 52). Significant changes in predorsal myomere 

 counts were seen in the 12.1-18.0 mm SL size inter- 

 val (Table 2). There is, however, considerable varia- 

 tion in predorsal myomere counts for all size 

 intervals, as shown in Table 2. 



Counts for preanal myomeres decreased with in- 

 creasing SL and decreasing PAL. There was a de- 

 crease in the mean number of preanal myomeres 

 from 48.4 to 38.5 for the larvae examined. This de- 



crease parallels the shortening of the gut as the SL 

 increases. 



The mean number of postanal myomeres increased 

 with the shortening of the gut and increasing SL. An 

 increase from a mean of 12.3 to 15.6 postanal 



myomeres was evident for the larvae examined (N = 

 40; Table 2) . No information is available in this study 

 for postanal myomere counts in larvalA sapidissima 

 >18.0 mm SL. 



329 



