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    Swimming ability in three Costa Rican dry forest rodents

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    CookTimmHyman2001.pdf (20.04Kb)
    Issue Date
    2001-12
    Author
    Cook, William M.
    Timm, Robert M.
    Hymen, Dena E.
    Publisher
    Revista de Biología Tropical
    Type
    Article
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    Abstract
    We investigated the swimming abilities of three Costa Rican dry forest rodents (Coues' rice rat. Oryzomys couesi, hispid cotton rat, Sigmodon hispidus, and spiny pocket mouse, Liomys salvini) associated with a large marsh, Laguna Palo Verde, using 90 s swim trials in a plastic container. Swimming ability was evaluated by observing the use of limbs and tail in the water, inclination to the surface, and diving and floating behavior. Rice rats could float, swim and dive, suggesting that they can exploit surface and underwater resources. Cotton rats swam at the water's surface, but were less skilled swimmers than rice rats. Spiny pocket mice tired quickly and had difficulty staying at the water's surface. Results suggest that differential swimming ability is related to the distribution of the three sympatric species within the marsh and adjacent forest habitats. We investigated the swimming abilities of three Costa Rican dry forest rodents (Coues' rice rat. Oryzomys couesi, hispid cotton rat, Sigmodon hispidus, and spiny pocket mouse, Liomys salvini) associated with a large marsh, Laguna Palo Verde, using 90 s swim trials in a plastic container. Swimming ability was evaluated by observing the use of limbs and tail in the water, inclination to the surface, and diving and floating behavior. Rice rats could float, swim and dive, suggesting that they can exploit surface and underwater resources. Cotton rats swam at the water's surface, but were less skilled swimmers than rice rats. Spiny pocket mice tired quickly and had difficulty staying at the water's surface. Results suggest that differential swimming ability is related to the distribution of the three sympatric species within the marsh and adjacent forest habitats.
    URI
    http://hdl.handle.net/1808/4493
    Collections
    • Ecology & Evolutionary Biology Scholarly Works [1493]
    • Center for Latin American and Caribbean Studies Scholarly Works [738]
    • Kansas African Studies Center Scholarly Works [272]
    Citation
    Cook, W. M., R. M. Timm, and D. E. Hymen. 2001. Swimming ability in three Costa Rican dry forest rodents. Revista de Biología Tropical 49(3):1101–1104.

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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