Nutrition of Fur Animals
نویسنده
چکیده
THE ONLY FUR ANIMALS that are now being raised commercially to any great extent are silver foxes and minks. Martens and fishers also have commercial possibilities if satisfactory reproduction can be obtained in captivity. Attempts have been made at one time or -another, largely through the efforts of propagandists, to ''ranch-raise'' skunks, badgers, raccoons, beavers, and muskrats for their fur, but the undertakings were not profitable because the cost of feeding and other costs of production exceeded the market quotations on similar wild-caught skins. A striking mutation may develop in some of these species, however, which will produce an animal with new^ characteristics that will make production in captivity remunerative. Natural selection in the wild, where matings are promiscuous, fosters the survival of those animals best fitted to live under rigorous conditions. The survival of fur animals in captivity, where matings can be controlled, is dependent upon their ability^ to produce beautiful pelts economically under more or less pampered conditions, rather than upon adaptation to rigorous competitive living. The profitable t^^pe is the docile, tractable, easily kept animal that responds to care without putting on excess fat and becoming sluggish and nonproductive. Economy of handling in captivity does not permit the retention of animals that require considerable exercise to be prolific. Elimination of the undesirable types is taking place on the more progressive ranches, though most emphasis in selection has thus far been placed on color and density of fur, prolificacy, and other factors that have a greater immediate bearing on commercial value.
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تاریخ انتشار 2010