AMATEUR FISH CULTUEE 



Dytiscus. This larva should be kept out of the 

 rearing ponds with just as much care as that of 

 the more voracious D. marginalis. 



With the kingfisher I have already dealt at 

 some length, so that I need say but little more 

 with regard to it. One of the worst features in 

 this bird's character is that it will go on killing 

 many more little fish than it can possibly eat. 

 As I have before said, it is surprising how these 

 birds will appear in considerable numbers where 

 a fish hatchery is started, even in localities where 

 they have before been considered rare. I have 

 already described how the ponds should be pro- 

 tected from their ravages. 



Herons do a great deal of harm to fish ponds, 

 even when the fish have got well into the yearling 

 stage. I have on one or two occasions known of 

 herons wounding trout of at least a pound in 

 weight. Besides the actual damage they do by 

 killing fish, they put all the other fish in the 

 pond off their feed through frightening them. 

 After a heron or kingfisher has been about a 

 rearing pond the little fish will not feed for a 

 considerable time, sometimes even for days. 

 Notwithstanding their very evil proclivities, 

 both herons and kingfishers are very interesting. 



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