Growth according to age 415 



density 1047 



size 1047 



water flow 1047 



after setting 474 



and keeping quality, hybrids have fast 1283 



survival, variable 696 



at higher temperatures 557 



larval rate at first 474 



1 average 575 



< . monthly 540 



_ banding data, primary 806 

 _, best 960 



in tropical areas 1291 



__, breaks in 9 89 



_, cell, part of a mechanism for regulating normal 891 



_ checks on shells 793 



_, comparative 1753 



_ continued throughout year 540 



_ controlling agents 125 



_ correlated with river flow 2143 



salinity change 2143 



curves 793, 828 

 _ dependent on environment 990 

 _ differences inherited 306 

 _ efficiency, gross 686 

 _, enhancement of 601 



experiment 1359 

 _, extended period of 9 7 



_ faster than under natural conditions 789 

 ., fastest in spring and fall 1270, 1271, 1275 



favorable 1537 

 . five times natural 555, 556 

 functions 1096, 1097 

 gnomonic 17 2 3 

 good 1000 

 greatest 680 



higher in sand than in mud 990 

 in length 222 



nineteen months 1270 



one year 2017 



plants, compounds which affect 916 



spring and fall greatest 1282 



summer, maximum 16 2 



time 537, 550 



weight 222 



, increased 835 



707 



