Studies of Food Intake: Lessons from Nontraditionally Studied Species

Bartness, Timothy J.; Demas, Gregory E.

doi:10.1007/0-306-48643-1_15

Cited by 20 publications

(22 citation statements)

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“…However, for the mice with a more severe restriction, total food intake was significantly lower than controls. It has been reported that showed that wild animals, such as Siberian hamsters primarily increase foraging and food hoarding, but laboratory animals including rats and mice prefer to increase food intake when they are faced with an energy challenge (Bartness, 1997;Bartness and Day, 2003;Bartness and Demas, 2004;Wood and Bartness, 1996). It seemed that Swiss mice were able to compensate for mild FD by increasing food intake, but did not compensate for a more severe reduction of food availability by further increasing food intake, indicating a limitation on the capability of gastrointestinal tract to process the ingested diet (Johnson et al, 2001a;Koteja, 1996;Koteja et al, 1994).…”

Section: Article In Pressmentioning

confidence: 99%

“…In terms of energy homeostasis and body weight balance, researchers have increasingly focused on behaviors, as the animals usually change their behavioral rhythm when environmental variations occur. Foraging and food-hoarding behavior increased significantly in Siberian hamsters (Phodopus sungorus) under the condition of energetic challenges, such as a reduction of food availability (Bartness, 1997;Bartness and Day, 2003;Bartness and Demas, 2004;Wood and Bartness, 1996). Hambly and Speakman (2005) calculated the energy expended on activity in MF1 mice and found a significantly decreased activity in restricted individuals compared with ad libitum controls, in which the restriction group decreased the energy expended on activity by 27.5%.…”

Section: Introductionmentioning

confidence: 97%

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Trade-off between energy budget, thermogenesis and behavior in Swiss mice under stochastic food deprivation

Cao

Zhang

Zhao

2009

Journal of Thermal Biology

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Section: Article In Pressmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Trade-off between energy budget, thermogenesis and behavior in Swiss mice under stochastic food deprivation

Cao

Zhang

Zhao

2009

Journal of Thermal Biology

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“…Siberian hamsters (Phodopus sungorus) and other hamster species (for review see: (Bartness and Demas, 2004)) primarily increase foraging ; Bartness and Day, 2003) and food hoarding (Bartness and Clein, 1994;Wood and Bartness, 1996; Bartness, 1997) in response to energetic challenges, rather than food intake as with laboratory rats and mice (for review see: ). Siberian hamsters and other animals that have the capacity to transport significant amounts of food (for review see: (Vander Wall, 1990)) use food hoarding as a crucial part of their ingestive behavioral repertoire in response to many naturally occurring energetic challenges (e.g., pregnancy, lactation (Bartness, 1997; Bartness and Day, 2003); for review see: ).…”

Section: Introductionmentioning

confidence: 99%

MTII attenuates ghrelin- and food deprivation-induced increases in food hoarding and food intake

Keen-Rhinehart

Bartness

2007

Hormones and Behavior

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Food deprivation triggers a constellation of physiological and behavioral changes including increases in peripherally-produced ghrelin and centrally-produced agouti-related protein (AgRP). Upon refeeding, food intake is increased in most species, however hamsters primarily increase food hoarding. Food deprivation-induced increases in food hoarding by Siberian hamsters are mimicked by peripheral ghrelin and central AgRP injections. Because food deprivation stimulates ghrelin as well as AgRP synthesis/release, food deprivation-induced increases in hoarding may be mediated by melanocortin 3 or 4 receptor (MC3/4-R) antagonism via AgRP, the MC3/4-R inverse agonist. Therefore, we asked: Can a MC3/4-R agonist block food deprivation-or ghrelin-induced increases in foraging, food hoarding and food intake? This was accomplished by injecting melanotan II (MTII), a synthetic MC3/4-R agonist, into the 3 rd ventricle in food deprived, fed or peripheral ghrelin injected hamsters and housed in a running wheel-based food delivery foraging system. Three foraging conditions were used: a) no running wheel access, non-contingent food, b) running wheel access, non-contingent or c) a foraging requirement for food (10 revolutions/pellet). Food deprivation was a more potent stimulator of foraging and hoarding than ghrelin. Concurrent injections of MTII completely blocked food deprivation-and ghrelin-induced increases in food intake and attenuated, but did not always completely block, food deprivation-and ghrelin-induced increases in food hoarding. Collectively, these data suggest that the MC3/4-R are involved in ghrelin-and food deprivation-induced increases in food intake, but other neurochemical systems, such as previously demonstrated with neuropeptide Y, also are involved in increases in food hoarding as well as foraging.

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“…For example, after food deprivation, changes in appetitive and consummatory ingestive behaviors occur, but vary among species (for review, see Refs. 3,4). Specifically, food-deprived laboratory rats increase their foraging for food and, when they find it, eat it (e.g., Ref.…”

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confidence: 99%

Fat pad-specific effects of lipectomy on foraging, food hoarding, and food intake

Dailey

Bartness

2008

American Journal of Physiology-Regulatory, Integrative and Comp

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Unlike most species, after food deprivation, Siberian hamsters increase foraging and food hoarding, two appetitive ingestive behaviors, but not food intake, a consummatory ingestive behavior. We previously demonstrated (Wood AD, Bartness TJ, Am J Physiol Regul Integr Comp Physiol 272: R783-R792, 1997) that increases in food hoarding are triggered by directly decreasing body fat levels through partial surgical lipectomy; however, we did not test if lipectomy affected foraging, nor if the magnitude of the lipid deficit affected food hoard size. Therefore, we tested whether varying the size of the lipectomy-induced lipid deficit and/or foraging effort affected foraging, food hoarding, or food intake. This was accomplished by housing adult male Siberian hamsters in a foraging/hoarding system and removing (x) both epididymal white adipose tissue (EWATx) pads, both inguinal white adipose tissue (IWATx) pads, or both EWAT and IWAT pads (EWATx + IWATx) and measuring foraging, food hoarding, and food intake for 12 wk. The lipectomy-induced lipid deficit triggered different patterns of white adipose tissue mass compensation that varied with foraging effort. Foraging for food (10 wheel revolutions to earn a food pellet) abolished the EWATx-induced compensation in IWAT pad mass. The magnitude of the lipid deficit did not engender a proportional change in any of the appetitive or consummatory ingestive behaviors. EWATx caused the greatest increase in food hoarding compared with IWATx or EWATx + IWATx, when animals were required to forage for their food. Collectively, it appears that the magnitude of a lipid deficit does not affect appetitive or consummatory behaviors; rather, when energy (foraging) demands are increased, loss of specific (gonadal) fat pads can preferentially stimulate increases in food hoarding.

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Studies of Food Intake: Lessons from Nontraditionally Studied Species

Cited by 20 publications

References 235 publications

Trade-off between energy budget, thermogenesis and behavior in Swiss mice under stochastic food deprivation

Trade-off between energy budget, thermogenesis and behavior in Swiss mice under stochastic food deprivation

MTII attenuates ghrelin- and food deprivation-induced increases in food hoarding and food intake

Fat pad-specific effects of lipectomy on foraging, food hoarding, and food intake

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