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Context-dependent responses of food-hoarding to competitors in Apodemus peninsulae:implications for coexistence among asymmetrical species 被引量:4
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作者 Hongyu NIU Jie ZHANG +3 位作者 Zhiyong WANG Guangchuan HUANG Chao PENG Hongmao ZHANG 《Integrative Zoology》 SCIE CSCD 2020年第2期115-126,共12页
Superior species may have distinct advantages over subordinates within asymmetrical interactions among sympatric animals.However,exactly how the subordinate species coexists with superior species is unknown.In the for... Superior species may have distinct advantages over subordinates within asymmetrical interactions among sympatric animals.However,exactly how the subordinate species coexists with superior species is unknown.In the forests west of Beijing City,intense asymmetrical interactions of food competition exist among granivorous rodents(e.g.Apodemus peninsulae,Niviventer confucianus,Sciurotamias davidianus and Tscherskia triton)that have broadly overlapping habitats and diets but have varied body size(range 15-300 g),hoarding habits(scatter vs larder)and/or daily rhythm(diurnal vs nocturnal).The smallest rodent,A.peninsulae,which typically faces high competitive pressure from larger rodents,is an ideal model to explore how subordinate species coexist with superior species.Under semi-natural enclosure conditions,we tested responses of seed-hoarding behavior in A.peninsulae to intraspecific and interspecific competitors in the situations of pre-competition(without competitor),competition(with competitor)and post-competition(competitor removed).The results showed that for A.peninsulae,the intensity of larder-hoarding increased and the intensity of scatter-hoarding declined in the presence of intraspecifics and S.davidianus,whereas A.peninsulae ceased foraging and hoarding in the presence of N.confucianus and T.triton.A.peninsulae reduced intensity of hoarding outside the nest and moved more seeds into the nest for larder-hoarding under competition from intraspecific individuals and S.davidianus.In most cases,the experimental animals could recover to their original state of pre-competition when competitors were removed.These results suggest that subordinate species contextually regulate their food-hoarding strategies according to different competitors,promoting species coexistence among sympatric animals that have asymmetrical food competition. 展开更多
关键词 asymmetrical food competition behavioral plasticity food-hoarding species coexistence sympatric rodents
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Visual landmark-directed scatter-hoarding of Siberian chipmunks Tamias sibiricus 被引量:3
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作者 Dongyuan ZHANG Jia LI +1 位作者 Zhenyu WANG Xianfeng YI 《Integrative Zoology》 SCIE CSCD 2016年第3期175-181,共7页
Spatial memory of cached food items plays an important role in cache recovery by scatter-hoarding animals.However,whether scatter-hoarding animals intentionally select cache sites with respect to visual landmarks in t... Spatial memory of cached food items plays an important role in cache recovery by scatter-hoarding animals.However,whether scatter-hoarding animals intentionally select cache sites with respect to visual landmarks in the environment and then rely on them to recover their cached seeds for later use has not been extensively explored.Furthermore,there is a lack of evidence on whether there are sex differences in visual landmark-based food-hoarding behaviors in small rodents even though male and female animals exhibit different spatial abilities.In the present study,we used a scatter-hoarding animal,the Siberian chipmunk,Tamias sibiricus to explore these questions in semi-natural enclosures.Our results showed that T.sibiricus preferred to establish caches in the shallow pits labeled with visual landmarks(branches of Pinus sylvestris,leaves of Athyrium brevifrons and PVC tubes).In addition,visual landmarks of P.sylvestris facilitated cache recovery by T.sibiricus.We also found significant sex differences in visual landmark-based food-hoarding strategies in Siberian chipmunks.Males,rather than females,chipmunks tended to establish their caches with respect to the visual landmarks.Our studies show that T.sibiricus rely on visual landmarks to establish and recover their caches,and that sex differences exist in visual landmark-based food hoarding in Siberian chipmunks. 展开更多
关键词 cache site food-hoarding animals sex difference visual landmark
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Differences in hoarding behavior between captive and wild sympatric rodent species 被引量:2
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作者 Hongmao ZHANG Yu WANG 《Current Zoology》 SCIE CAS CSCD 北大核心 2011年第6期725-730,共6页
In hand reared birds and mammals, it is generally considered that the development of hoarding behavior is the result of an interaction between the development and maturation of the nervous system and learning from ind... In hand reared birds and mammals, it is generally considered that the development of hoarding behavior is the result of an interaction between the development and maturation of the nervous system and learning from individual experience. How- ever, few studies have been done on wild animals. We tested differences in hoarding behavior between captive reared and wild individuals of two sympatric small rodents, Korean field mice Apodemus peninsulae and Chinese white-bellied rats Niviventer confucianus. Our aim was to identify if lack of experience from the wild would result in poorly developed hoarding behavior. The Korean field mice perform scatter- and larder-hoarding behaviors whereas Chinese white-bellied rats hoard food in larders only. Within outdoor enclosures we compared seed-hoarding behavior in reared juveniles (RJ, 40-50 d old, pregnant mothers were captured in the wild), wild juveniles (WJ, as young as the RJ) and wild adults (WA, over-winter animals). We found that a lack of experience from the wild had significant effects on seed-hoarding behavior for both species. The RJ-group removed and hoarded fewer seeds than the WJ- and WA-groups. The two latter groups hoarded seeds in a similar way. In the Korean filed mouse the ILl-group placed more seeds on the ground surface than other groups. These findings suggest that wild experience is important for the acquisition of an appropriate food-hoarding behavior (especially for scatter-hoarding) in these species 展开更多
关键词 Behavioral ontogeny food-hoarding behavior INSTINCT Learning Practice Social experience
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