132 GOLDFISH VAEIETIES A^D 



they will last. In hot weather they can be kept about three days and in 

 October about two weeks. 



A method of carrying live food which is growing in favor is to crate 

 them (without water) in layers in a box. Frames about 10 x 12 inches, 

 made of %-inch square wood, are covered on one side with cheesecloth. 

 These are floated in the water, the daphnia dropped in, spread out evenly 

 and placed in carrying box which, of course, needs to be airtight. The 

 number of layers are only limited by the depth of the box. Daphnia may 

 be spread to a depth of about >4 inch, but mosquito larvae may be piled to 

 Yi. inch without injury. 



In transferring from carrying pails to stock tanks it is well to first 

 pour in small portions to a white enamel basin which enables one to 

 carefully go over the catch and remove any insect enemies. (See page 

 156.) If the daphnia are too thick to be readily examined, some water 

 should be added. A little care in keeping out the enemies at the start is 

 energy well invested. Most of the enemies and the dirt may be sifted 

 out (under water) by using a screen just large enough for the daphnia to 

 pass through. 



A beginner will do well to make the acquaintance of an experienced 

 daphnia collector and go along with him on a trip. There are now 

 aquarium societies in many of the large cities, part of their activities 

 being the dissemination of such knowledge. All those interested in 

 aquaria should have either active or corresponding membership in one 

 of these organizations. If return stamps are enclosed the publishers of 

 this work will always be glad to put the beginner in touch with the 

 nearest society. 



All beginners seem to have the idea that sufficient daphnia can be 

 raised in a tub or trough to feed with. This has been tried many times 

 but never with any degree of success. If the daphnia pools are too far 

 distant to make collecting practicable it is best to try to inoculate some 

 suitable pond nearby, but there should be no fish in the pond. Daphnia 

 if not crowded may be shipped quite a distance. There are several Phil- 

 adelphia collectors constantly making shipments in season. 



The practical way to raise daphnia for food purposes is described 

 in the chapter on Wholesale Breeding (page 62). 



Cyclops. Wherever Daphnia are found, Cyclops is pretty sure to be, 

 and also in a great many places where the former does not exist. They 

 are Crustacea of about the same size and color as Daphnia, but under 

 close examination are of entirely different structure and also of different 

 action, going rapidly through the water in straight lines with a jumping 

 movement. Like Daphnia they are divided into many species and are 



