226 



The Stickleback 



little hsh are soon found in great numbers in them. More especially 

 is this the case if the loch is understocked with trout. One loch 

 which I made was simply alive with sticklebacks for about 20 teet 

 all round, but when I introduced a few thousand trout the number 

 of sticklebacks was very soon reduced. Their favourite haunts are 

 the backwaters of streams, the sides of lochs among weeds, small 

 ponds, and ditches. 



Fig. 209. — The Thiec-spineJ Stickleback. 



