— 144 — 



The boundaries for the spawning are: 

 northern limit: the Faeroes (including these); 



southern limit: south of the regions investigated (occurs in the Mediterranean): 

 minimum temperature: a little less than 8°. 

 maximumtemperature: ? 

 principal spawning time: spring and early summer. 



9. Bib (Gadus luscus L.) 

 Only the northern boundary lies within the regions investigated, over very large parts 

 of which the species is excluded from spawning on account of its_ requirements for high 

 temperatures and salinities and shallow depths. It belongs to the species which spawn in 

 very shallow water and beyond ca. 100 meters at any rate no spawning seems to take place. 

 The region where the greatest production of the fry occurs is the English Channel. 

 It also spawns in the Bay of Biscay and on the Atlantic coasts of the British Isles, but 

 in very small quantities at most in the North Sea and not at all at the Faeroes or Ice- 

 land. It is the most exclusively warm-water form amongst the species spawning in shal- 

 low water. 



The boundaries for the spawning are: 



northern limit: northern parts of the Atlantic coasts of the British Isles; 

 southern limit: south of the regions investigated (occurs in the Mediterranean); 

 minimum temperature: ca. 8° — 9°; 

 maximum temperature: ? 

 principal spawning time: spring. 



10. Poutassou {Gadus Poutassou [Risso]) 

 Only the northern boundary falls within the regions investigated. Owing to its re- 

 quirements for high salinities and temperatures and great depths the species is excluded 

 from spawning in the waters lying to the east of the Submarine Eidge between Iceland 

 and the Faeroes (i. e. the whole Norwegian Sea), as also in the North Sea and the Channel. 

 It spawns within or in the neighbourhood of the 1000-raeter line, but probably pela- 

 gically like, for example, Sebastes at a depth of 2—300 meters and not in water of less 

 salinity than 35"25— 35-30 "/oo. Spawning on a large scale occurs beyond or near to the 1000- 

 meter line, both west of the Faeroes and the British Isles as also in the Bay of Biscay. 

 The boundaries for the spawning are: 

 northern limit: the waters S. of Iceland (including these); 

 southern limit: south of the regions investigated (occurs in the Mediterranean); 

 minimum temperature: ca.8°; 

 maximum temperature: ? 

 principal spawning time: spring and end of winter. 



11. Silvery pout {Gadiculus argenteus Guich.) 

 Only the northern boundary of this species falls within the regions investigated. On 

 account of its requirements for great depths and high temperatures and salinities the spec- 

 ies is excluded from spawning over large parts of these regions, thus from E. of the Sub- 



