CONTENTS 



Page 



Preface 2 



I. Introduction 3 



1. The regions investigated 3 



2. The apparatus employed 6 



3. The determination of the material 8 



4. The use and importance of the material 10 



5. Explanation of the tables and charts of distribution 13 



II. Special Part 14 



G-enus Gadtts: 



1. Polar cod {Gadus saida Lep.) 15 



2. Cod {Gadus callarias L.) 17 



3. Coalfish (Green cod) ( Gadus virens L.) 34 



4. Pollack {Gadus pollaehius L.) 44 



5. Haddock {Gadus œglefimis L.) 51 



6. Whiting {Gadus nierlangus L.) 57 



7. Norway pout {Gadus Esmarki Nils.) 63 



8. Poor cod {Gadus minutus 0. F. Miil.) ■ 70 



9. Bib {Gadus Iwsciis L.) 76 



10. Poutassou {Gadus Poutassou (Risso)) 82 



11. Silvery pout {Gadus (Gadiculus) argenteus G-uich.) 88 



Genus Merluccius: 



12. Hake {Merluccius vulgaris Mem.) 93 



Genus Molva: 



13. Common Ling {Molva molva L.) 98 



14. Blue Ling {Molva byrkelange ("Walb.)) 103 



15. Mediterranean Ling {Molva elongata (Risso)) 107 



Genus Raniceps: 



16. Lesser Porkbeard {Raniceps raninus (L.)) 109 



Genus Brosmius: 



17. Torsk {Brosmius brosme (Ascan.)) 110 



III. General Part 114 



A. The waters investigated 114 



1. Iceland 116 



2. The Pseroes 124 



3. British Isles 125 



4. North Sea and Skager Rak 128 



5. The Channel 131 



6. Bay of Biscay 133 



B. The species investigated, their spawning regions and the external conditions charac- 

 terizing these 139 



1. Grouping of the species according to depths 148 



2. Grouping of the species according to temperatures 148 



3. Grouping of the species according to salinity 149 



