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    • Journal of Range Management, Volume 55, Number 6 (November 2002)
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    Research observation: Desert bighorn sheep diets in northwestern Sonora, Mexico

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    Author
    Tarango, L. A.
    Krausman, P. R.
    Valdez, R.
    Kattnig, R. M.
    Issue Date
    2002-11-01
    Keywords
    species reintroduction
    Ovis canadensis mexicana
    Ovis canadensis
    browse plants
    gender differences
    Mexico
    feces composition
    forbs
    diets
    wildlife management
    seasonal variation
    botanical composition
    browsing
    grasses
    Ovis canadensis mexicana
    sexual segregation
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    Citation
    Tarango, L. A., Krausman, P. R., Valdez, R., & Kattnig, R. M. (2002). Research observation: desert bighorn sheep diets in northwestern Sonora, Mexico. Journal of Range Management, 55(6), 530-534.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/643696
    DOI
    10.2307/4003995
    10.2458/azu_jrm_v55i6_tarango
    Additional Links
    https://rangelands.org/
    Abstract
    We used microhistological analyses of fresh fecal pellets to determine seasonal diets of desert bighorn sheep (Ovis canadensis mexicana Merriam 1901) in northwestern Sonora, Mexico from April 1997 to December 1998. We identified 41 plant species (22 browse, 10 forbs, 5 grasses, and 4 succulents) in diets of bighorn sheep. We found no differences between diets of males and females, and diet diversity between sexes was similar (P 0.05). Diet included: browse (45.7%), forbs (32.0%), succulents (17.8%), and grasses (4.5%). The consumption of succulents was higher during spring, decreased during summer, increased in autumn, and decreased in winter. Consumption of forbs was higher during winter and summer. Globemallow (Sphaeralceae spp.), desert agaves (Agave spp.), range ratany (Krameria parvifolia Benth.), buck-wheatbrush (Eriogonum spp.), foothill palo verde (Cercidium microphyllum [Torrey] Rose Johnst.), Engelmann prickly pear (Opuntia engelmanii Salm-Dyck), desert ironwood (Olneya tesota A. Gray), and elephant tree (Bursera microphylla A. Gray) were consumed throughout the study. As biologists identify potential release sites for restoration of bighorn sheep in Mexico, studies of diet composition will provide managers with information for successful translocations.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4003995
    Scopus Count
    Collections
    Journal of Range Management, Volume 55, Number 6 (November 2002)

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