Effects of food restriction on body mass, thermogenesis and serum leptin level in<i>Apodemus chevrieri</i>(Mammalia: Rodentia: Muridae)

Zhu, Weiming; Yuan, Ming; Zhang, H.; Zhang, L.; Wang, Z. K.

doi:10.1080/11250003.2013.796409

Cited by 11 publications

(8 citation statements)

References 35 publications

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“…The abrupt decline of weekly body mass gain (wBMG) experienced by the rats with restricted resources reflected an attempt to allocate the resources acquired to fulfil maintenance costs, reducing the resources directed to somatic growth. The limitation of growth to diminish maintenance costs represents a well-known adaptive strategy displayed by several species of small mammals to cope with adverse conditions and shortage of resources (Bozinovic et al, 2007;Zhu et al, 2013;Yan et al, 2014). Conversely, the influence of social conflict over body size growth is less clear-cut.…”

Section: Discussionmentioning

confidence: 99%

Growth patterns in male rats exposed to concurrent long-term environmental challenges

Cuervo¹,

Racca²,

Beldoménico³

2016

FAVE Cs Vet

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SUMMARY.Growth is a key determinant of fitness in animals, and may be affected by the environmental challenges presented over the course of an individual's lifespan. When faced with limited resources and environmental challenges, organisms may prioritize the development and maintenance of particular processes over others. To expand our understanding of the consequences of organism exposure to a changing environment, we offer a long-term experiment to compare the growth patterns of young male rats exposed and not exposed to food limitation and social conflict. The patterns of growth of young rats were altered by the exposure to these environmental challenges, two of the most frequently faced by animals. As expected, scarcity of food resulted in a marked growth decline in animals exposed to nutritional stress. Interestingly, individuals exposed to an unstable social environment, but fed ad libitum, evidenced a growth rate 6% smaller than those under stable social conditions. An interaction between food limitation and social conflict was not observed. As a larger body size growth results in a competitive advantage in encounters, the detected divergence on growth patterns may represent significant consequences on the individual's life trajectory. RESUMEN. Patrones de crecimiento en ratas macho expuestas de manera prolongada a desafíos ambientales concurrentes. En animales, la eficacia biológica es influenciada por el crecimiento, que a su vez es afectado por los desafíos ambientales que el individuo enfrente a lo largo de su vida. Ante escasez de recursos u otros desafíos, los organismos priorizarían el desarrollo y mantenimiento de algunos procesos por sobre otros. Para profundizar nuestro conocimiento sobre las consecuencias de la exposición a un ambiente cambiante, desarrollamos un experimento de larga duración para comparar los patrones de crecimiento de ratas jóvenes expuestas y no expuestas a restricción alimentaria y conflicto social. La exposición a estos dos desafíos ambientales, comunes en la naturaleza, alteró los patrones de crecimiento de las ratas. La escasez de alimento ocasionó un descenso marcado del crecimiento en los animales bajo restricción alimentaria. Mientras que individuos expuestos a inestabilidad social, pero con alimento ad libitum, demostraron una tasa de crecimiento 6% menor que aquellos en condiciones sociales estables. Adicionalmente, no se encontró interacción significativa entre restricción alimentaria y conflicto social. Siendo que un mayor crecimiento corporal resulta ventajoso ante interacciones competitivas, la diferencia detectada entre los patrones de crecimiento tendría consecuencias de importancia en la trayectoria de vida de los individuos.

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Section: Discussionmentioning

confidence: 99%

Growth patterns in male rats exposed to concurrent long-term environmental challenges

Cuervo¹,

Racca²,

Beldoménico³

2016

FAVE Cs Vet

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“…The Hengduan Mountain region is a proper alp and gorge region which is located at the boundary between the Palaearctic region and the Oriental region, which was been considered "the harbor in the fourth ice age" (Zhu et al 2012). Apodemus is the most common rodent to inhabit the broadleaf forests in the temperate zone of the Palaearctic region (Orlov et al 1996;Zhu et al 2013); Chevrier's field mouse, Apodemus chevrieri (Milne-Edwards 1868) (Mammalia: Rodentia: Muridae), is the inherent species in the Hengduan Mountain region (Zheng 1993). The aims of this study were to evaluate the total energy requirements of lactating females, to assess maximum energy intake and to investigate the trade-off between thermogenesis and energy intake in lactation in A. chevrieri.…”

Section: Introductionmentioning

confidence: 99%

Energy requirements during lactation in femaleApodemus chevrieri(Mammalia: Rodentia: Muridae) in the Hengduan Mountain region

Zhu

Yuan

Liu

et al. 2015

Italian Journal of Zoology

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Lactation is the most energetically demanding period in small mammals. To investigate the energy balance strategies in lactating Apodemus chevrieri, we compared body mass, energy intake, thermogenic capacity, organ mass and other morphological parameters of the digestive tract of reproductive and non-reproductive females. The results showed that at parturition, mean body mass was 23.89% higher than that of the non-reproductive group. Over the course of the lactation period (from day 0 to day 21), females decreased by 24.30% in body mass and increased by 21.46% in resting metabolic rate (RMR), then all reached the original levels at day 30. Non-shivering thermogenesis (NST) decreased significantly and reached a minimum at peak lactation (on day 21). During lactation, mean NST was 18.55% lower than that of the non-reproductive group. At the same time, lactating A. chevrieri increased their energy intake significantly. Energy intake increased after parturition and reached a maximum at day 21 of lactation (216.46 kJ/day), 2.57 times that in the non-reproductive group, and then energy intake significantly decreased and reached the original level at day 30. Liver mass, digestive tract length and weight increased significantly in the lactating group compared to the non-reproductive group. All of the results indicated that A. chevrieri increased RMR and energy intake, decreased NST and body mass and mobilised the digestive tract to match the high energy demands for lactation.

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“…During cold exposure, A. chevrieri showed increased energy intake, thermogenesis and reduced body mass, and serum leptin levels (Zhu et al, 2011). Food restriction alone may also reduce body mass in A. chevrieri (Zhu et al, 2013). Random food deprivation decreased body fat mass and increased activity significantly (Zhu et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Effects of food restriction on energy metabolism in male Apodemus chevrieri from Hengduan mountain region of China

Chen

Gong

Zhang

et al. 2019

IJAR

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To investigate the relationship between the energy strategies in response to food restriction and the levels of metabolism in small mammals, body mass, resting metabolic rate (RMR), nonshivering thermogenesis (NST) and cytochrome c oxidase (COX) activity were measured in Apodemus chevrieri that were subjected to different levels of food restriction (FR). The results showed that cold-exposed group had significantly increased RMR and NST, but decreased body mass and survival rate after being restricted to 80% of ad libitum food intake compared with their counterparts maintained at room temperature. A. chevrieri with higher RMR consumed higher food intake than individuals with lower RMR, whereas no differences were observed in body mass and survival rate between two groups after being restricted to 80% of ad libitum food intake. The results suggest that A. chevrieri characterized by higher levels of metabolism are sensitive to periods of FR, providing a support for the “metabolism switch hypothesis”.

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Effects of food restriction on body mass, thermogenesis and serum leptin level inApodemus chevrieri(Mammalia: Rodentia: Muridae)

Cited by 11 publications

References 35 publications

Growth patterns in male rats exposed to concurrent long-term environmental challenges

Growth patterns in male rats exposed to concurrent long-term environmental challenges

Energy requirements during lactation in femaleApodemus chevrieri(Mammalia: Rodentia: Muridae) in the Hengduan Mountain region

Effects of food restriction on energy metabolism in male Apodemus chevrieri from Hengduan mountain region of China

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