3o Determination of Age of Adults by Scales, and Effect of 

 Eavlronment on First Year's Growth as it Bears on Age Determinationo 



By 



Lionel Ao Tlfalford and Kenneth Ho Mosher 



CONTENTS 

 Preface Page 



Int^^OdUCtiOno oooaouoooooooooooooooooooo y* 



The Material = Its collectionj, preparation and examinationo o o o 98 

 ErrCiT of interpreting the annulus oooooooooooooooo 100 

 Recognition of the new anrmlias ooooooooooooo 

 Evidence bearing on the validity of scales for determining 



o o . o 105 



the age of adult pilchards ooooooooo 



107 



Effect of environment on growth of the pilchard, and its bearing 



on age de termination oooooooooooooooooooo 112 



Sranmary and conclusions oooooo.oooooooooooooo 116 



i^i te^ature citei_io ooouoouoooooooooooooeooo xxo 



96 



