CHAPTER XVIII. 



FISH-BREEDING. 



Causes of the decrease of Salmon and Trout. — Remarks on fish-ponds and 

 the manner of stocking them. 



Artificial Fish-Breeding — with illustrations, showing the manner of 

 expressing the ova and milt, the arrangement of hatching-troughs, and 

 the growth of the fish ; from " A Complete Treatise on Artificial Fish- 

 Breeding," by W. H. Fry, Esq., with some remarks of the author of 

 this work. 



The Aquarium — its appropriate size and form, and manner of stocking it 

 with fish and introducing suitable aquatic plants. 



Remarks on Fish-Ponds, and the manner of produc- 

 ing AND REARING FiSH IN A NATURAL WAY. — All "true- 

 hearted anglers," (we thank Dr. Bethune for the word), who 

 have witnessed the ruthless and indiscriniinate destruction 

 of game-fish, will take an interest in the plans proposed and 

 the means now happily adopted for their increase. Many a 

 fly-fisher who travels a long way to enjoy his favorite sport, 

 is shocked at witnessing the wilful extermination of Salmon 

 and Trout. The former by spearing, netting, and erecting 

 high dams without providing for their free passage up and 

 down — the latter by snaring them on their spawning-beds, 

 catching them in seines and eel-weirs, and drawing off mill- 

 ponds. On Trout-streams there are still other agencies at 

 work. The coal-mine poisoning the brook with sulphur ; the 

 saw-mill filling it with slabs and saw-dust : the factory with 



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