NOTES ON THE DAILY LIFE AND FOOD OF 

 CAMBARUS BARTONIUS BARTONI 1 * 



FLOYD E. CHIDESTER 



In all animals we find that there are periods of ac- 

 tivity and rest. During- the active period, we find such 

 interesting phenomena as feeding, copulation, and, in some 

 animals, a very interesting series of movements connected 

 with the care of the young. 



My study of the daily life of the crawfish is one of a 

 series of studies instigated by Professor C. F. Hodge in 

 the effort to arrive at some accurate data as to the work 

 performed by various species. 



Crawfish were kept in two different aquaria during the 

 winter of 1907- '08, and their actions watched closely. 



One tank was an ordinary running water tank with 

 a pile of sand at one end, and containing, in addition to 

 crawfish, at times, trout eggs, young trout, frogs, clams 

 and a turtle. There were also, all the time the crawfish 

 were kept there, several tufts of the common water weed, 

 Fontinalis, floating in the water. 



The other tank was a heavy glass aquarium, measuring 

 on the inside, lxl|x2 feet 8 in. This aquarium was 

 elevated about an inch at one end, and beginning at the 

 other end, a mud and sand bottom sloped gradually up- 

 ward to a level bank which was covered with moss and 

 grass and kept moist 



In the aquarium was a clam to assist in clearing the 

 water, a water hyacinth, and some more of the water weed 

 mentioned above. 



At different times, as I experimented with the food of 

 the crawfish, there were hits of fresh meat, sprouts, eggs 

 and young of trout, toads, frogs and salamanders ; dead 

 frogs and fish, and dead crawfish. 



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