Abstract：
:For food-hoarding strategies to be maintained in a population, the benefits of hoarding must outweigh the costs. If rewards are too low to offset the costs of hoarding, hoarders might be expected to abandon hoarding and/or shift to an alternative storing strategy (e.g., increase food consumption). However the ability to adjust to such circumstances requires that animals anticipate long-term rewards and adjust storing strategies to modify future outcomes. To test this, we subjected three sympatric food-hoarding species (the Korean field mouse, Apodemus peninsulae, both a scatter and larder hoarder; the Chinese white-bellied rat, Niviventer confucianus, only a larder hoarder; and Père David's rock squirrel, Sciurotamias davidianus, predominantly a scatter hoarder) to repeated episodes of complete cache loss over nine sequential trials in semi-natural enclosures. Although these species increased harvest and consumption rates throughout the experiment, none of these three species ceased hoarding under these conditions. The variation in responses observed across species and gender suggest some degree of behavioural plasticity to compensate for such extreme losses, but a general inability to abandon hoarding or shift to an alternative strategy. Future studies should consider how such responses correspond to natural patterns of intensive pilferage in the field.
journal_name
Behav Processesjournal_title
Behavioural processesauthors
Luo Y,Yang Z,Steele MA,Zhang Z,Stratford JA,Zhang Hdoi
10.1016/j.beproc.2014.04.005subject
Has Abstractpub_date
2014-07-01 00:00:00pages
36-43eissn
0376-6357issn
1872-8308pii
S0376-6357(14)00098-9journal_volume
106pub_type
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