324 



M. Butler etal. 



TABLE 7-4 Mean Length^ and Mean Density^ o/Lepidurus in Pond A (PA), 

 North Meadow Lake (NML), and North Meadow Pond (NMP) 

 in 1973 



mm 



2. , -2 



md m 



E 

 E 



c 

 « 



o 

 o 



35 



30 



25 



20 



15 



g. 101- 



T r 



-I 1 1 r 



20 



Jun 



20 

 Jul 



10 20 



Aug 



FIGURE 7-11. Total length of Lepidurus during the 1973 

 growing season in Barrow ponds and lakes. For Pond A, 

 length (mm) = 0.4262 (days after hatching) + 0.4126. 



