Chinchillavermittlungsforum

Willkommen auf unserem Infoportal - kompetent und tierwohlorientiert
 
StartseiteStartseite  PortalPortal  GalerieGalerie  FAQFAQ  SuchenSuchen  AnmeldenAnmelden  Login  

Teilen | 
 

 White, G.W. et al.: Area of black-tailed prairie dog colonies in eastern Colorado

Nach unten 
AutorNachricht
Flora
Admin & Mod
Admin & Mod
avatar

Anzahl der Beiträge : 11643
Anmeldedatum : 10.07.11
Alter : 34
Ort : Speyer

BeitragThema: White, G.W. et al.: Area of black-tailed prairie dog colonies in eastern Colorado   12.12.12 20:28

Gary C. White, James R. Dennis, and Frances M. Pusateri: Area of black-tailed prairie dog colonies in eastern Colorado.

Link: http://wildlife.state.co.us/SiteCollectionDocuments/DOW/WildlifeSpecies/SpeciesOfConcern/BlackTailedPrairieDog/PDF/PrairieDogColony.pdf


Zitat :
Abstract

In 2001 the Colorado Division of Wildlife (CDOW) began writing a conservation plan for
shortgrass prairie species including the black-tailed prairie dog (Cynomys ludovicianus),
partly in response to a petition filed to list the black-tailed prairie dog as a Threatened
Species and a finding made by the United States Fish and Wildlife Service (USFWS) that a
listing was warranted but precluded. To determine the status of the species in Colorado,
acreage of active black-tailed prairie dog colonies was estimated in eastern Colorado during
June-August 2002, using aerial line intercept methods. We stratified the survey by
county boundaries based on imperfect prior knowledge of colony areas by county and
computed the proportion of each line intersecting active prairie dog colonies. Active
colonies were defined as colonies with prairie dogs observed from the air or fresh digging
at burrow entrances. For 131,615 km2 surveyed, estimated area of active colonies was
255,398 ha, with a 95% confidence interval of ±9.5%, indicating that 1.94% of the surveyed
range was occupied. This estimate may be biased low because some active colonies
might have been misclassified as inactive or because some active colonies might not have
been spotted when flown over. In contrast, this estimate may be biased high because some
active colonies included in the survey may be active in only a portion of the colony considered
as intersecting the survey line. However, our estimate for Colorado was consistent
with the estimated area of active black-tailed prairie dog colonies in Wyoming from Sidle
et al. (2001), where 2.02% of 66,085 km2 was estimated to be occupied.

_________________
Es grüßt Flora mit den Plüschbällchen Luise, Tobi, Kevin, Mathilda und Stuart großes Herz 

Tierquälerei beginnt schon bei der Missachtung der natürlichen Bedürfnisse von Tieren.
Prof. Dr. Helmut Pechlaner
Nach oben Nach unten
http://www.chinchilla-scientia.de
 
White, G.W. et al.: Area of black-tailed prairie dog colonies in eastern Colorado
Nach oben 
Seite 1 von 1

Befugnisse in diesem ForumSie können in diesem Forum nicht antworten
Chinchillavermittlungsforum :: Austausch rund um Chinchillas & andere Tiere :: Literatur und Sonstiges :: Chinchillaliteratur & Literatur zu Kleinsäugern :: Literatur zu anderen Kleintierarten :: Granivore :: Hörnchenliteratur-
Gehe zu: