Gnawing mammals

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Gnawing mammals

  1. 1. Gnawing Mammals<br />
  2. 2. Mammals<br />Warm blooded<br />Have a bony skeleton<br />Have a coat of hair<br />Babies drink milk secreted by mothers mammary glands<br />Viviparous - Young are born live<br />(not in eggs)<br />
  3. 3. Types of Gnawing Mammals<br />Rodents: consists of the following families:<br />Mice, rats, voles<br />Squirrels<br />Marmots & prairie dogs<br />Porcupines<br />Beavers<br />Rabbits, hares, & pikas<br />
  4. 4. Characteristics of Rodents<br />4 large incisor teeth<br />Teeth never stop growing<br />Double layers<br />Front edge is sharper than back edge<br />Self sharpen with gnawing<br />Must gnaw to keep teeth worn down<br />
  5. 5. Gnawing mammals<br />Herbivores<br />Major prey species<br />r-selected population growth<br />Numerous off-spring<br />Low parental care<br />Early reproduction<br />Short life-span & high mortality<br />Maximum population below carrying capacity<br />

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