AGE \XD GROWTH OF HERRING IN CANADIAN WATERS 

 BY EINAR LEA, BERGEN, NORWAY. 



CONTENTS. 



Page. 



"A " (Jknkual. 



81 

 I Introduction 



II Methods of determining age and growth in herring 81 



III Structure of herring scales 



IV Scales as an indication of age. Sources of error 9:3 



V The scales as an indication of growth. Sources of error 100 



VI Age determination and growth measurement in practice 101 



VII Preparation of scales for preservation 101 



VIII Definitions and abbreviations lO"! 



IX Collecting of material 



"B" Spkcial. 



The Canadian Material. 



X Description and preliminary grouping of material 115 



XI Age (a) Waters about Prince Edward Island 116 



(&) Waters about Magdalen Islands 1^1 



(c) Newfoundland waters 122 



(d) Cape North southwards along Atlantic Coast 126 



(e) Comparison of the different areas 130 



XII Growth. 



Comparison of growth in samples of similar age composition . . . . 132 



1. Samples from Newfoundland 132 



2. " " Magdalen Islands 13" 



3. " " Northumberland Straits 139 



4. " " North Sydney compared with exceptional 



sample from St. George's Bay, Nfd.. . 143 



5. Samples differing in age composition 146 



6. Comparison with Magdalen Islands samples 147 



7. Comparison with exceptional sample from St. George's Bay. 148 



8. Comparison with sample from North Sydney 149 



9. Comparison with old fish from West Ardoise, etc 150 



10. Graphical illustrations of results obtained 150 



11. Samples from Magdalen Islands compared with remainder. 153 



12. Graphical illustration of the results obtained 155 



13. Samples from Northumberland Straits, North Sydney, and 



the Atlantic coast compared 156 



14. Summary 1"^ ' 



XII Appendix. Observations as to seasonal growtJi in young herring. . . . 157 



XIV Results of age and growth studies viewed in the light of observations 



as to the racial characters 1"*9 



77 



