Hoarding versus the immediate consumption of food among hamsters and gerbils

Wong, Roderick

doi:10.1016/0376-6357(84)90003-2

Cited by 41 publications

(9 citation statements)

References 19 publications

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“…1). The increase in hoarding after food deprivation in our simulated burrow system is consistent with previous research on Siberian hamsters under similar conditions (5) and Syrian hamsters under less naturalistic conditions (19,27,40). This was, to the best of our knowledge, the first demonstration of an effect of leptin treatment on hoarding behavior in Syrian hamsters.…”

Section: Discussionsupporting

confidence: 91%

“…Consistent with this perspective, Lea and Tarpy (19), Wong (40), and Phillips et al (27), using only minor modifications of laboratory cages, found that Syrian hamsters increase hoarding behavior but not food intake in response to food restriction. In most studies, however, the food source was no more than 20 cm from the cage to which it was hoarded.…”

mentioning

confidence: 81%

“…In the hour after the end of a food-deprivation period, rodents show a tendency to consume, rather than hoard, a meal. Thus, in some experiments, rats (22), gerbils (24,40), and Syrian hamsters (40) are given a brief meal at the end of the food-deprivation period before testing the hoarding response to reduce confounds in the hoarding scores due to individual and group differences in time spent eating. Previous data confirm that plasma leptin concentrations are not increased until 36-48 h after the start of refeeding (29).…”

Section: Methodsmentioning

confidence: 99%

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Food hoarding is increased by food deprivation and decreased by leptin treatment in Syrian hamsters

Buckley

Schneider

2003

American Journal of Physiology-Regulatory, Integrative and Comp

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. Food hoarding is increased by food deprivation and decreased by leptin treatment in Syrian hamsters. Am J Physiol Regul Integr Comp Physiol 285: R1021-R1029, 2003. First published May 1, 2003 10.1152 10. /ajpregu.00488.2002satory increases in food intake are commonly observed after a period of food deprivation in many species, including laboratory rats and mice. Thus it is interesting that Syrian hamsters fail to increase food intake after a period of food deprivation, despite a fall in plasma leptin concentrations similar to those seen in food-deprived rats and mice. In previous laboratory studies, food-deprived Syrian hamsters increased the amount of food hoarded. We hypothesized that leptin treatment during food deprivation would attenuate food-deprivation-induced increases in hoarding. Baseline levels of hoarding were bimodally distributed, with no hamsters showing intermediate levels of hoarding. Both high (HH) and low hoarding (LH) hamsters were included in each experimental group. Fifty-six male hamsters were either food deprived or given ad libitum access to food for 48 h. One-half of each group received intraperitoneal injections of leptin (4 mg/kg) or vehicle every 12 h during the food-deprivation period. Within the HH group, the hoarding score increased significantly in food-deprived but not fed hamsters (P Ͻ 0.05). Leptin treatment significantly decreased hoarding in the food-deprived HH hamsters (P Ͻ 0.05). The LH hamsters did not increase hoarding regardless of whether they were food deprived or had ad libitum access to food. These results are consistent with the idea that HH hamsters respond to energetic challenges at least in part by changing their hoarding behavior and that leptin might be one factor that mediates this response. food intake; hunger; ob protein THE PHYSIOLOGICAL CONTROL of ingestive behavior involves both consummatory and appetitive aspects of behavior, and yet most research has focused only on the consummatory aspect. Most investigators have measured the amount of food ingested in response to treatment with various hormones, neuropeptides, and metabolic conditions (reviewed in Refs. 1,14,32,33,41), whereas fewer have examined the appetitive aspects of ingestion, such as the approach to food, the consumption of unpalatable substances, or foraging and hoarding (e.g., 3-6, 11). Treatment with putative anorectic hormones, such as the adipocyte protein leptin, decreases the amount of food eaten in a wide variety of species, including chickens (10, 12), mice (9, 15, 18, 26), rats (34), Syrian hamsters (39), ground squirrels (25), dogs (20), sheep (16), primates (36), and marsupials (17). In many species, food deprivation results in decreased plasma concentrations of leptin, increased central release of neuropeptide Y (NPY), and increased food intake relative to that of ad libitum-fed controls (reviewed in Refs. 14,32,33,41). This phenomenon is termed postfast hyperphagia and is common in laboratory animals, such as rats, mice, and monkeys and is also observed in most human beings.H...

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Section: Discussionsupporting

confidence: 91%

mentioning

confidence: 81%

Section: Methodsmentioning

confidence: 99%

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Food hoarding is increased by food deprivation and decreased by leptin treatment in Syrian hamsters

Buckley

Schneider

2003

American Journal of Physiology-Regulatory, Integrative and Comp

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“…A second finding is that, at least in pigeons, level of food deprivation does not appear to affect impulsiveness. As food deprivation is increased, pigeons will approach the food hopper more quickly and increase their nocturnal responding to obtain more food, but they will not decrease their impulsiveness (Logue et al 1988;Logue & Pena-Correal 1985; these results might be different with other species and in other situations, see Christensen-Szalanski et al 1980;Collier 1982;Eisenberger et al 1982;McSweeney 1974;Snyderman 1983b;Wong 1984). Equation 1 and Figure 2 are consistent with Logue and Pena-Correal's (1985) findings.…”

Section: Variation In Self-control Independent Of the Presentsupporting

confidence: 74%

On the functions relating delay, reinforcer value, and behavior

Mazur

Herrnstein

1988

Behav Brain Sci

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“…The benefits for seeds of burial by seed-caching rodents have helped drive the evolution of seed traits that attract rodent dispersers. The diversity of seed-caching rodents in arid lands outside North America appears to be much lower than that in North America (Wong 1984;Agren et al 1989;Midgley et al 2002), which may help explain the lack of Ephedra seeds adapted for rodent dispersal in these other regions.…”

Section: Discussionmentioning

confidence: 92%

Dispersal Syndromes in North AmericanEphedra

Hollander

Wall

2009

International Journal of Plant Sciences

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Ephedra (Gymnosperma, Gnetales, Ephedraceae) includes 13 species in the arid American Southwest that have three morphological types of propagules. We performed field and laboratory experiments on five species (E. torreyana, E. antisyphilitica, E. viridis, E. funerea, and E. nevadensis) that represent the three morphological types (dispersal syndromes) and two intermediate forms. Ephedra torreyana has large, winged cone bracts and small seeds that are largely ignored by animals and that are dispersed by the wind. Ephedra antisyphilitica has succulent cone bracts that are eaten by birds that disperse the seeds in their feces. Ephedra viridis has large, conspicuous seeds that are attractive to some rodents, which gather the seeds and scatter hoard them in soil. Ephedra funerea and E. nevadensis are also dispersed by seed-caching rodents but share traits with wind-dispersed and bird-dispersed species, respectively. Most North American species of Ephedra are dispersed by seed-caching rodents, and this mode of dispersal is not represented in Ephedra from other continents (i.e., arid portions of South America, North Africa, Europe, Asia), perhaps because of a more diverse assemblage of seed-caching rodents in North America than in these other regions.

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Hoarding versus the immediate consumption of food among hamsters and gerbils

Cited by 41 publications

References 19 publications

Food hoarding is increased by food deprivation and decreased by leptin treatment in Syrian hamsters

Food hoarding is increased by food deprivation and decreased by leptin treatment in Syrian hamsters

On the functions relating delay, reinforcer value, and behavior

Dispersal Syndromes in North AmericanEphedra

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