27 



APPENDIX F: HENKING 



It can by no means be said, however, that the view given is the only possible 

 explanation. Further material must still be obtained for the comprehension of the matter. 

 Such material exists already perhaps in the report of the Committee on the migrations 

 of the fishes. 



The Ling (Lota molva) has a double maximum. The one lies in winter and is 

 distinct in the Skager Rak (Fig. 21 — 22), also in the southern North Sea, though somewhat 

 later. In the Skager Rak a second maximum occurs in the middle of summer (Fig. 21—22). 



- 160- 



- 120- 



60 



40 - 



1 2 3 4 5 6 7 8 9 10 II 12 

 Fig. îj. Rays: south. North Sea, 1902 



I 2 3 4 5 6 7 8 9 10 II 12 

 Fig. 25. Rays: Skager Rak, 1902 



I 2 3 ^ 5 6 7 8 9 10 II 12 

 Fig. 24. Rays: south. North Sea, 1903 



12 3 4 5 6 7 8 3 10 II 12 

 Fig. 26. Rays: [Skager Rak, 1903 



Lastly, the rays, under which are to be understood the two species. Raja clavata 

 and R. bat is chiefly, may be mentioned. Further information concerning their relative 

 proportions, has yet to be obtained. 



The rays are of interest in that they show a distinct depression in the Skager Rak 

 during the summer months and a very high catch in the winter (Fig. 25 and 26). The same 

 holds for the southern North Sea, yet a distinct and repeated increase in the summer is 

 noticeable here (Fig. 23—24). 



