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Diets of swift foxes (Vulpes velox) in continuous and fragmented prairie in Northwestern Texas

Southwestern Naturalist

By:
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DOI: 10.1894/0038-4909(2007)52[504:DOSFVV]2.0.CO;2

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Abstract

Distribution of the swift fox (Vulpes velox) has declined dramatically since the 1800s, and suggested causes of this decline are habitat fragmentation and transformation due to agricultural expansion. However, impacts of fragmentation and human-altered habitats on swift foxes still are not well understood. To better understand what effects these factors have on diets of swift foxes, scats were collected in northwestern Texas at two study sites, one of continuous native prairie and one representing fragmented native prairie interspersed with agricultural and fields in the Conservation Reserve Program. Leporids, a potential food source, were surveyed seasonally on both sites. Diets of swift foxes differed between sites; insects were consumed more on continuous prairie, whereas mammals, birds, and crops were consumed more on fragmented prairie. Size of populations of leporids were 2-3 times higher on fragmented prairie, and swift foxes responded by consuming more leporids on fragmented (11.1% frequency occurrence) than continuous (3.8%) prairie. Dietary diversity was greater on fragmented prairie during both years of the study. Differences in diets between sites suggested that the swift fox is an adaptable and opportunistic feeder, able to exploit a variety of food resources, probably in relation to availability of food. We suggest that compared to continuous native prairie, fragmented prairie can offer swift foxes a more diverse prey base, at least within the mosaic of native prairie, agricultural, and fields that are in the Conservation Reserve Program.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Diets of swift foxes (Vulpes velox) in continuous and fragmented prairie in Northwestern Texas
Series title:
Southwestern Naturalist
DOI:
10.1894/0038-4909(2007)52[504:DOSFVV]2.0.CO;2
Volume
52
Issue:
4
Year Published:
2007
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
504
Last page:
510
Number of Pages:
7