Patch use under predation hazard : effects of the red imported fire ant on deer mice foraging behavior /
associated with foraging in the presence of fire ants were
| Main Author: | |
|---|---|
| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1995.
|
| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | associated with foraging in the presence of fire ants were by examining two aspects of patch use: density-dependence of compensated for by biasing effort toward rich patches. Mice disproportionately higher harvest rate in rich patches in the experimental arena containing two rich and two poor resource fire ants, and were filled with 5 or 16 whole sunflower seeds harvest. Mice also made significantly more patch visits, harvested more seeds, spent more time, and had a I compared patch use patterns of deer mice foraging in the in the absence of fire ants, meaning the mice harvested the in their presence. Resource harvest was density-independent increased costs or lost time due to taking seeds to made more out-of-patch foraging bouts (taking seeds to mixed in with 250 ml sand. Foraging strategy was identified of rich and poor patches in their absence. patches, resulting in positively density-dependent resource patches. All patches either had fire ants or did not have presence and absence of a non-conventional predation hazard, presence and absence of fire ants. The increased costs presence of fire ants, mice biased effort toward rich presence of fire ants; there were no differences between use protective cover, mice harvested the same number of seeds in protective cover), and spent more time foraging out of the red imported fire ants. Deer mice foraged for 60 min in an resource harvest and over/underuse of rich patches relative resource patches in the presence of fire ants. Despite any same proportion of seeds from rich and poor patches. In the strategy in the absence of fire ants to a Bayesian strategy the same total time at the same overall harvest rate in the to poor. Deer mice switched from a fixed search time |
|---|---|
| Item Description: | "Major subject: Wildlife and Fisheries Sciences". Vita. |
| Physical Description: | xi, 68 leaves : illustrations ; 28 cm. Also available online. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references. |