. Cyclopedia of farm animals. Domestic animals; Animal products. PROGS FUR-BEARING ANIMALS 395. must be enormous. It is very heavy in the hatch- eries, where the best conditions for successful rearing prevail. Edible species. There are thirteen edible species of frogs in America, with rather more than half a dozen sub- species or varieties. In the eastern United States, there are at least three species of edible frogs, the common bull- frog(Rana cates- biana), the green frog (R. clami- tans) and the spring or leop- ard frog (R. vir- eseens). The first named is the largest frog and the last the
. Cyclopedia of farm animals. Domestic animals; Animal products. PROGS FUR-BEARING ANIMALS 395. must be enormous. It is very heavy in the hatch- eries, where the best conditions for successful rearing prevail. Edible species. There are thirteen edible species of frogs in America, with rather more than half a dozen sub- species or varieties. In the eastern United States, there are at least three species of edible frogs, the common bull- frog(Rana cates- biana), the green frog (R. clami- tans) and the spring or leop- ard frog (R. vir- eseens). The first named is the largest frog and the last the smallest, but the leopard frogs offer the best chances for suc- cessful cultiva- tion because of Fig. 404. Bunfrog {Sana eatesbiana). their gregarious character, which the others do not possess. In the case of most of the smaller frogs the present abundant supply of wild material makes attempts at rearing them unprofitable, but in the case of the largest known frog, the American bullfrog, the natural supply being apparently doomed to exhaus- tion and the market prices high, the experiment of rearing for the market is promising. Points to be observed in frog-farming. Experiments in the different state hatcheries in Pennsylvania have demonstrated that tadpoles, young frogs and mature frogs must be kept sepa- rate ; that while tadpoles will eat dead animal food, frogs will eat only living things, preferably insects; that ponds for tadpoles should contain grasses, and those for young and old frogs must be liberally provided with water-lilies and other flowering water-plants to attract insect life ; that all ponds must be surrounded by tight boards or mosquito-wire fences to prevent frogs from escaping; that overcrowding, even in the tadpole stage, is fatal; that ponds for tadpoles should have and those for frogs must have a soft mud bottom below the reach of freezing, in which the creatures may hibernate. In the life-history of the frogs, the early part, the tadpole, presents no d
Size: 1516px × 1648px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbaileylh, bookcentury1900, bookdecade1920, bookyear1922
