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North American desert rodents in the family Heteromyidae live in an unpredictable environment characterized by extremes in temperature and food availability; therefore, the ability to hoard food is a vital adaptation. Although much laboratory research has investigated food-hoarding tactics of heteromyid rodents, data from natural systems are scarce. We used a combination of fluorescently labeled seeds and observations of focal individuals to evaluate food-hoarding behavior in wild Merriam's kangaroo rats (Dipodomys merriami) living in different competitive environments. There was considerable individual variation within populations in the tendency to larderhoard seeds in a burrow versus scatterhoard seeds in widely...
The ecological relationships of three cricetine species-Peromyscus maniculatus, Peromyscus boylii, and Neotoma stephensi-and their utilization of habitat were revealed by species removals from unfenced plots and vegetation tailoring experiments. When N. stephensi, a woodland and shrubland species of woodrat, was removed from a manzanita-oak shrubland and pinyon-juniper woodland, P. boylii showed few significant changes in its use of the vegetational microhabitats on the grid or in the nature of its arboreal activity. However, when P. boylii, a woodland and shrubland mouse, was removed from a grid in juniper-oak shrubland and juniper grassland, both P. maniculatus, an inhabitant of open habitats such as grassland,...
    map background search result map search result map Competitive environment affects food-hoarding behavior of Merriam's kangaroo rats (Dipodomys merriami) Competitive environment affects food-hoarding behavior of Merriam's kangaroo rats (Dipodomys merriami)