Using Fecal DNA and Closed‐Capture Models to Estimate Feral Horse Population Size

Author(s):  
Kathryn A. Schoenecker ◽  
Sarah R. B. King ◽  
L. Stefan Ekernas ◽  
Sara J. Oyler‐McCance
2020 ◽  
Vol 89 (12) ◽  
pp. 2909-2921
Author(s):  
Charlotte E. Regan ◽  
Sarah A. Medill ◽  
Jocelyn Poissant ◽  
Philip D. McLoughlin

2007 ◽  
Vol 98 (6) ◽  
pp. 594-602 ◽  
Author(s):  
Y. Plante ◽  
J. L. Vega-Pla ◽  
Z. Lucas ◽  
D. Colling ◽  
B. de March ◽  
...  

2009 ◽  
Vol 117 (1-2) ◽  
pp. 74-83 ◽  
Author(s):  
Cassandra M.V. Nuñez ◽  
James S. Adelman ◽  
Carolyn Mason ◽  
Daniel I. Rubenstein

1992 ◽  
Vol 70 (5) ◽  
pp. 929-934 ◽  
Author(s):  
John W. Turner Jr. ◽  
Michael L. Wolfe ◽  
Jay F. Kirkpatrick

A population of feral horses (Equus caballus) was studied from 1986 to 1991 to determine the demographic impact of predation by the mountain lion (Felis concolor). The population, inhabiting a 600-km2 area on the central California – Nevada border comprised approximately 162 individuals > 1 year old, with an average of 9 yearlings, 8 two-year-olds, and 144 adults. Numbers of horses varied by only 4–8% and showed no consistent trend. The parturition peak spanned May and June, when 80% of foaling occurred. One-third of the average annual cohort of 33 foals was missing by July and only half of the cohort remained by October. The mean first-year survival rate estimated from the differential incidence of foals and yearlings in successive years was 0.27, which was less than one-third of the foal survival rate reported for other feral horse populations. A minimum of four adult mountain lions used the study area each year between May and October. Of 28 foal carcasses located from May to mid-July, at least 82% were the result of mountain lion kills. No evidence of predation on older horses was observed, but mountain lions preyed on mule deer (Odocoileus hemionus) during winter. We conclude that the growth of this horse population is limited by predation.


Author(s):  
Clayton Marlow ◽  
Leonard Gagnon ◽  
Elena Hovland ◽  
Lynn Irby

Description of the ecological niche feral horses fill in Theodore Roosevelt National Park requires information on reproductive rates, home range size, individual and band affinity to home ranges, food and shelter requirements and seasonal diets. Therefore, the initial objectives will be to: 1. identify the number, size and location of home ranges for harem and bachelor stallion bands; 2. describe daily and seasonal movements of bands within identified home ranges; 3. describe the vegetation habitat types and landform types used by horses for mating, foaling, foraging, and resting cover; 4. describe seasonal horse diets; and 5. collect data on sex, age and social hierarchy within respective bands to facilitate estimation of horse population growth rates. Ultimately, this information will be used to accomplish the project goal; integrate horse requirements with those of elk, bison and the Park's vegetation communities to determine the large ungulate carrying capacity of Theodore Roosevelt National Park.


2006 ◽  
Vol 87 (5) ◽  
pp. 855-858 ◽  
Author(s):  
Claudio Prigioni ◽  
Luigi Remonti ◽  
Alessandro Balestrieri ◽  
Silvia Sgrosso ◽  
Giuseppe Priore ◽  
...  

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