Part III.] Pond Fish Culture. 145 



ing a very considerable amount of food for the fish, especially 

 the small and young fish. 



Animals that were not or could not be chopped up and fed to 

 the fish were satisfactorily disposed of in this way. No odors 

 from the "dead box" were noticeable from the shore. Just 

 how much benefit was derived from the "dead box" could not 

 be estimated. The experiment did not cost much, and it 

 proved a satisfactory way of disposing of dead animals. We 

 found it advisable in many cases, particularly in windy 

 weather, to leave the dead animals on the shore long enough 

 for the flies to fill them with eggs. A fish culturist with a few 

 ponds might work some such device and get a considerable 

 amount of benefit from it, especially in the feeding of small 

 and young fish. 



The Lantern Experiment. 



Lanterns are sometimes hung over ponds to attract various 

 kinds of insects, which drop into the water and serve as food 

 for the fish. The lantern may be hung by the side of a piece 

 of cheesecloth stretched between two posts. Many insects fly 

 against the cloth and tumble into the water. A pane of glass 

 is better than the cloth, and when the lantern is hung between 

 two sheets of glass the scheme works best. At certain sea- 

 sons of the year, when insects of some species are common, the 

 device seems to work well, and a considerable number of in- 

 sects are thrown into the water for the fish. We tried the 

 lantern business, but have no way of knowing just how much 

 good came from its use. In our judgment, it would be neces- 

 sary to keep the thing in operation until the fish got accus- 

 tomed to it. We would advise placing the lantern near a feed- 

 ing place, or feed the fish near the place where the lantern is 

 located. 



ENEMIES OF FISH. 



Among the greatest natural enemies of fish are the fish 

 themselves. The so-called "game fish" feed very largely upon 

 other varieties, especially the vegetable-eating fish, and when 

 food becomes scarce, upon their own kind. The subject, how- 

 ever, of fish feeding upon each other has been touched upon in 

 different places in this bulletin, and by reading up what has 

 been said of the various kinds of fish this information can be 

 secured, especially under the various headings that touch upon 

 the life histories and food habits of the different kinds of fish. 



The Turtle. 



One of the chief natural enemies, outside of the fish them- 

 selves, here at the State Fish Hatchery, is the turtle. There 

 are different kinds of turtles, and outside of a few that seem 

 to feed for the most part upon vegetable matter we find that 

 most of them are not averse to eating fish. The Snapping 

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