Magnitude of food overabundance affects expression of daily torpor

Eto, Takeshi; Hayashi, Rintaroh; Okubo, Yoshinobu; Kashimura, Atsushi; Koshimoto, Chihiro; Sakamoto, Shinsuke H.; Morita, Tetsuo

doi:10.1016/j.physbeh.2014.12.007

Cited by 11 publications

(7 citation statements)

References 31 publications

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“…In addition, Schubert et al (2010) demonstrated that high foraging costs ( poor foraging conditions) result in TE in laboratory mice. Moreover, our previous study (Eto et al, 2015) showed that the magnitude of food overabundance is clearly associated with reduced expression of daily torpor in the large Japanese field mouse (Apodemus speciosus). Together, these studies suggest that small rodents can recognise the cost of energy acquisition as well as endogenous energy condition, and they subsequently use this information to determine whether to undergo torpor.…”

Section: Discussionmentioning

confidence: 91%

“…The effects caused by the differences of fetal growth on subsequent traits have, however, been demonstrated (Ryan and Vandenbergh, 2002;Nagao et al, 2004). In addition, recent studies have also demonstrated that some adaptive phenotypic traits are clearly affected by relatively recent experiences (Lima and Dill, 1990;Agrawal, 2001;Milligan et al, 2001;Reznick and Ghalambor, 2001; see also Eto et al, 2015). Therefore, past experience may alter the expression of survival behaviours.…”

Section: Introductionmentioning

confidence: 99%

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Individual differences in torpor expression in adult mice are related to relative birth weight

Kato

Sakamoto

Eto

et al. 2018

Journal of Experimental Biology

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Daily torpor is a physiological adaptation in small mammals and birds, characterised by drastic reductions in metabolism and body temperature. Energy-constraining conditions, such as cold and starvation, are known to cause the expression of daily torpor. However, the reason for high degrees of inter- and intra-individual variation in torpor expression (TE) in similar situations is not clear. As littermates of altricial animals are exposed to an uneven allocation of maternal resources from conception to weaning, we tested whether early nutritional experiences have long-term effects on TE in adults. We used full-sibling littermates of laboratory mice that as adults were starved overnight to induce torpor. We measured body mass from birth until adulthood as an indicator of nutritional status, and calculated the relative body mass (RBM) as an indicator of the difference in nutritional status within a litter. After maturation, we subjected mice to five repeated torpor induction trials involving 24 h of fasting and 5 days of recovery. Half of the female mice displayed great individual variation in TE whereas male mice rarely exhibited daily torpor. In females, RBM at birth influenced TE, irrespective of body mass in adulthood; thus, female mice born with low RBMs displayed high TE in adulthood. In conclusion, we provide evidence that TE in mice differs among littermates, and that this variation is linked closely to heterogeneous nutritional experiences during the fetal period.

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Section: Discussionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Individual differences in torpor expression in adult mice are related to relative birth weight

Kato

Sakamoto

Eto

et al. 2018

Journal of Experimental Biology

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“…Research shows that rodent density and food abundance influence the feeding strategies of rodents (Rusch et al 2014;Eto et al 2015). Food abundance in 2012 was less than in 2011 and 2013.…”

Section: Discussionmentioning

confidence: 99%

“…Another significant factor that can influence consumption and caching of seeds is food abundance (Vander Wall 2002;Li & Zhang 2007;Eto et al 2015). During periods of extreme food shortage, rodents consistently consume seeds and reduce hoarding behavior, but during high food abundance, rodents increase hoarding .…”

Section: Introductionmentioning

confidence: 99%

Effects of insect infestation on rodent‐mediated dispersal of Quercus aliena: results from field and enclosure experiments

Zhang

Chen

Steele

et al. 2019

Integrative Zoology

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Rodents influence plant establishment and regeneration by functioning as both seed predators and dispersers. However, these rodent-plant interactions can vary significantly due to various environmental conditions and the activity of other insect seed-predators. Here, we use a combination of both field and enclosure (i.e, individual cage and semi-natural enclosure) experiments, to determine whether rodents can distinguish sound seeds from those infested with insects. We also demonstrate how such responses to insects are influenced by food abundance and other environmental factors. We presented rodents with two kinds of Quercus aliena seeds (sound and insect-infested seeds) in a subtropical forest in Qinling Mountains, central China, from September to November of 2011 to 2013. The result showed that rodents prefer to hoarded and ate sound seeds than infested seeds in the field and semi-natural enclosure, while they prefer to ate infested seeds than sound seeds in the individual cages. In addition, both hoarding and eating decisions were influenced by food abundance. Rodents hoarded more sound seeds in years of high food abundance while they consume more acorns in years of food shortage. Compared with field results, rodents reduced scatter hoarding behavior in semi-natural enclosures and ate more insect-infested seeds in smaller individual cages. These results further confirm that rodents distinguish infested seeds form non-infested seeds but demonstrate that this behavior varies with conditions (environment and food abundance). We suggest that such interactions will influence the dispersal and natural regeneration of seeds as well as predation rates on insect larvae. This article is protected by copyright. All rights reserved.

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“…The mouse displays behavioral and physiological adaptations to both natural and artificial winter conditions, including food hoarding (Imaizumi 1979;Soné and Kohno 1999), huddling (Eto et al 2014) and daily torpor (Eto et al 2014(Eto et al , 2015. While morphological changes in response to cold Ta have been observed in the congeneric South China field mouse A. draco (Zhu et al 2012a), the influence of day length on digestive tract morphology in A. speciosus is unknown.…”

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confidence: 99%

Flexibility of Digestive Tract Morphology in Response to Environmental Conditions in the Large Japanese Field MouseApodemus speciosus

Eto¹,

Ozaki²,

Kato³

et al. 2016

Mammal Study

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Magnitude of food overabundance affects expression of daily torpor

Cited by 11 publications

References 31 publications

Individual differences in torpor expression in adult mice are related to relative birth weight

Individual differences in torpor expression in adult mice are related to relative birth weight

Effects of insect infestation on rodent‐mediated dispersal of Quercus aliena: results from field and enclosure experiments

Flexibility of Digestive Tract Morphology in Response to Environmental Conditions in the Large Japanese Field MouseApodemus speciosus

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