Download Conservation of the Black-Tailed Prairie Dog: Saving North by John Hoogland PDF

By John Hoogland

The prairie puppy is a colonial, keystone species of the grassland environment of western North the USA. Myriad animals frequently stopover at colony-sites to feed at the grass there, to take advantage of the burrows for shield or nesting, or to prey at the prairie canines. regrettably, prairie canines are disappearing, and the present quantity is just approximately 2% of the quantity encountered through Lewis and Clark within the early 1800s. half I of Conservation of the Black-Tailed Prairie puppy summarizes ecology and social habit for pivotal concerns equivalent to while prairie canines breed, how a long way they disperse, how they impact different organisms, and what kind of they compete with cattle. half II files how lack of habitat, poisoning, plague, and leisure capturing have prompted the precipitous decline of prairie puppy populations during the last two hundred years. half III proposes useful ideas which could make sure the longterm survival of the prairie puppy and its grassland surroundings, and in addition are reasonable to personal landowners. we won't count on farmers and ranchers to undergo the entire expenses of conservation whereas the remainder of us get pleasure from the entire advantages. With seven hundred references, 37 tables, seventy five figures and pictures, and a word list, Conservation of the Black-Tailed Prairie puppy is a different and very important contribution for natural world managers, politicians, environmentalists, and curious naturalists. John L. Hoogland is a Professor of Biology on the collage of Maryland's Appalachian Laboratory, and has studied prairie canines for the final 33 years.

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For more details, see Hoogland 1995. 2). 7). During the first year, sexual dimorphism is slight but significant at first juvenile emergence and in October and November, trivial in February and March, and pronounced and significant in May and June. Among adults, males average about 10%–15% heavier than females throughout most of the year. Females in late pregnancy, however, sometimes outweigh adult males (Knowles 1987; Hoogland 2003b). 7). 6) and between age and reproductive success (Hoogland 1995).

Juvenile prairie dogs—also called pups or young—are less than 9 months old and first emerged from the natal burrow (when about 6 weeks old) less than 8 months ago. Yearlings are at least 9 months old but less than 21 months old, and adults are at least 21 months old. For many studies, including several in this volume, the term “adult” includes both adult and yearling prairie dogs. Good conservation requires information about survivorship and reproductive success of prairie dogs of known ages (Chapter 3).

Unfortunately, we know little about dispersal of prairie dogs. Before proceeding, let me define a few key terms. Natal dispersal is the emigration of a young individual from the area of birth, and breeding dispersal is the emigration of an older individual from the area where it mated (Greenwood 1980; Holekamp 1984). The natal territory is the area where a prairie dog is born, and the breeding territory is the area where an individual mates. An emigrant is a prairie dog who disperses away from one colony, and who might become an immigrant into another colony.

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