I 



56^ 



\/^rkloring =. 



^kOrt.SeM- < 25 cm 

 PLAICE 



9* 



4" 5' 6^ ^^ 8^ 



Figure 11, — Distribution of plaice of various sizes during various seasons in the 

 Heligoland Bight. The distribution is shown for three areas. For each month, 

 one of the vertical cuts is made in each area. For some areas the density of 

 plaice (divided in plaice larger and smaller than 25 centimeters) is shown on 

 axis vertical to the cuts. For each of these areas one cut is shoym for each 

 month. For technical reasons the cuts are placed side by side. Actually 

 they fall on eaoh other. 71 



