Causes and Rates of Mortality of Swift Foxes in Western Kansas
Knowledge of mortality factors is important for developing strategies to conserve the swift fox (Vulpes velox), a species being considered for listing under the Endangered Species Act, but available information about swift fox mortality is inadequate. We used radiotelemetry techniques to examine the...
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| Veröffentlicht in: | The Journal of wildlife management 1998-10, Vol.62 (4), p.1300-1306 |
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| container_title | The Journal of wildlife management |
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| creator | Sovada, Marsha A. Roy, Christiane C. Bright, J. B. Gillis, James R. |
| description | Knowledge of mortality factors is important for developing strategies to conserve the swift fox (Vulpes velox), a species being considered for listing under the Endangered Species Act, but available information about swift fox mortality is inadequate. We used radiotelemetry techniques to examine the magnitude and causes of mortality of swift fox populations in 2 study areas in western Kansas. One study area was predominantly cropland, the other rangeland. Mortality rates, calculated using Kaplan-Meier estimation techniques in a staggered entry design, were 0.55 ± 0.08 (x̄ ± SE) for adult and 0.67 ± 0.08 for juvenile swift foxes. We did not detect differences between study areas in mortality rates for adults or juveniles. Predation by coyotes (Canis latrans) was the major cause of mortality for adult and juvenile swift foxes in both study areas, and vehicle collision was an important mortality factor for juveniles in the cropland study area. No mortality was attributed to starvation or disease. |
| doi_str_mv | 10.2307/3801994 |
| format | Article |
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B. ; Gillis, James R.</creator><creatorcontrib>Sovada, Marsha A. ; Roy, Christiane C. ; Bright, J. B. ; Gillis, James R.</creatorcontrib><description>Knowledge of mortality factors is important for developing strategies to conserve the swift fox (Vulpes velox), a species being considered for listing under the Endangered Species Act, but available information about swift fox mortality is inadequate. We used radiotelemetry techniques to examine the magnitude and causes of mortality of swift fox populations in 2 study areas in western Kansas. One study area was predominantly cropland, the other rangeland. Mortality rates, calculated using Kaplan-Meier estimation techniques in a staggered entry design, were 0.55 ± 0.08 (x̄ ± SE) for adult and 0.67 ± 0.08 for juvenile swift foxes. We did not detect differences between study areas in mortality rates for adults or juveniles. Predation by coyotes (Canis latrans) was the major cause of mortality for adult and juvenile swift foxes in both study areas, and vehicle collision was an important mortality factor for juveniles in the cropland study area. No mortality was attributed to starvation or disease.</description><identifier>ISSN: 0022-541X</identifier><identifier>EISSN: 1937-2817</identifier><identifier>DOI: 10.2307/3801994</identifier><identifier>CODEN: JWMAA9</identifier><language>eng</language><publisher>Bethesda, MD: The Wildlife Society</publisher><subject>Animal and plant ecology ; Animal, plant and microbial ecology ; Animals ; Automobile accidents ; Biological and medical sciences ; Demecology ; Endangered species ; Farmlands ; Foxes ; Fundamental and applied biological sciences. 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B.</creatorcontrib><creatorcontrib>Gillis, James R.</creatorcontrib><title>Causes and Rates of Mortality of Swift Foxes in Western Kansas</title><title>The Journal of wildlife management</title><description>Knowledge of mortality factors is important for developing strategies to conserve the swift fox (Vulpes velox), a species being considered for listing under the Endangered Species Act, but available information about swift fox mortality is inadequate. We used radiotelemetry techniques to examine the magnitude and causes of mortality of swift fox populations in 2 study areas in western Kansas. One study area was predominantly cropland, the other rangeland. Mortality rates, calculated using Kaplan-Meier estimation techniques in a staggered entry design, were 0.55 ± 0.08 (x̄ ± SE) for adult and 0.67 ± 0.08 for juvenile swift foxes. We did not detect differences between study areas in mortality rates for adults or juveniles. Predation by coyotes (Canis latrans) was the major cause of mortality for adult and juvenile swift foxes in both study areas, and vehicle collision was an important mortality factor for juveniles in the cropland study area. No mortality was attributed to starvation or disease.</description><subject>Animal and plant ecology</subject><subject>Animal, plant and microbial ecology</subject><subject>Animals</subject><subject>Automobile accidents</subject><subject>Biological and medical sciences</subject><subject>Demecology</subject><subject>Endangered species</subject><subject>Farmlands</subject><subject>Foxes</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Mammalia</subject><subject>Mortality</subject><subject>Poisoning</subject><subject>Predation</subject><subject>Predators</subject><subject>Swifts</subject><subject>Vertebrata</subject><subject>Vulpes velox</subject><subject>Wildlife conservation</subject><subject>Wildlife management</subject><subject>Young animals</subject><issn>0022-541X</issn><issn>1937-2817</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1998</creationdate><recordtype>article</recordtype><recordid>eNp1kF1LwzAUhoMoOKf4F4qIXlVPPpo0N4IUp-JE8AO9K8ckhY6umUmL7t_bscFA8Oqcw3l4eHkJOaZwwTioS54D1VrskBHVXKUsp2qXjAAYSzNBP_bJQYwzAE5pLkfkqsA-uphga5Nn7IbNV8mjDx02dbdcHS_fddUlE_8z_Oo2eXexc6FNHrCNGA_JXoVNdEebOSZvk5vX4i6dPt3eF9fT1AguupRLqrTlxjhpcyWZBQeoeSZsZahzmKtKo7LGykxwi4yi1kyK3GXq01gwfEzO1t5F8F_9EKGc19G4psHW-T6WVNFcQyYH8OQPOPN9aIdsJeOCAUieDdD5GjLBxxhcVS5CPcewLCmUqxLLTYkDebrRYTTYVAFbU8ctLjnlGWyxWex8-Nf2Cw9RebM</recordid><startdate>19981001</startdate><enddate>19981001</enddate><creator>Sovada, Marsha A.</creator><creator>Roy, Christiane C.</creator><creator>Bright, J. 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B. ; Gillis, James R.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c434t-36179d3cce6d8762d0e0a9354dfc1eea87f9a7dcd6543da21a992648e57bcd0c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1998</creationdate><topic>Animal and plant ecology</topic><topic>Animal, plant and microbial ecology</topic><topic>Animals</topic><topic>Automobile accidents</topic><topic>Biological and medical sciences</topic><topic>Demecology</topic><topic>Endangered species</topic><topic>Farmlands</topic><topic>Foxes</topic><topic>Fundamental and applied biological sciences. 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B.</au><au>Gillis, James R.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Causes and Rates of Mortality of Swift Foxes in Western Kansas</atitle><jtitle>The Journal of wildlife management</jtitle><date>1998-10-01</date><risdate>1998</risdate><volume>62</volume><issue>4</issue><spage>1300</spage><epage>1306</epage><pages>1300-1306</pages><issn>0022-541X</issn><eissn>1937-2817</eissn><coden>JWMAA9</coden><abstract>Knowledge of mortality factors is important for developing strategies to conserve the swift fox (Vulpes velox), a species being considered for listing under the Endangered Species Act, but available information about swift fox mortality is inadequate. We used radiotelemetry techniques to examine the magnitude and causes of mortality of swift fox populations in 2 study areas in western Kansas. One study area was predominantly cropland, the other rangeland. Mortality rates, calculated using Kaplan-Meier estimation techniques in a staggered entry design, were 0.55 ± 0.08 (x̄ ± SE) for adult and 0.67 ± 0.08 for juvenile swift foxes. We did not detect differences between study areas in mortality rates for adults or juveniles. Predation by coyotes (Canis latrans) was the major cause of mortality for adult and juvenile swift foxes in both study areas, and vehicle collision was an important mortality factor for juveniles in the cropland study area. No mortality was attributed to starvation or disease.</abstract><cop>Bethesda, MD</cop><pub>The Wildlife Society</pub><doi>10.2307/3801994</doi><tpages>7</tpages></addata></record> |
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| ispartof | The Journal of wildlife management, 1998-10, Vol.62 (4), p.1300-1306 |
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| source | Jstor Complete Legacy |
| subjects | Animal and plant ecology Animal, plant and microbial ecology Animals Automobile accidents Biological and medical sciences Demecology Endangered species Farmlands Foxes Fundamental and applied biological sciences. Psychology Mammalia Mortality Poisoning Predation Predators Swifts Vertebrata Vulpes velox Wildlife conservation Wildlife management Young animals |
| title | Causes and Rates of Mortality of Swift Foxes in Western Kansas |
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