Dietary proteins improve hibernation and subsequent reproduction in the European hamster, Cricetus cricetus.
Am J Physiol Regul Integr Comp Physiol
; 315(4): R848-R855, 2018 10 01.
Article
em En
| MEDLINE
| ID: mdl-30024776
ABSTRACT
The reproductive success of hibernators depends not only on food quality during reproduction but also on their body condition when emerging after hibernation, which, in turn, is highly dependent on the hibernation pattern. To date, no studies, to our knowledge, have fully investigated the role of macronutrients throughout the annual lifecycle of hibernators and the strong interdependency between its different phases. This study tested the effects of two diets with different lipid and protein composition on the prehibernation body condition, hibernation pattern, and reproduction of captive-reared European hamsters. Hamsters fed the high-lipid diet gained more body mass in the prehibernation period than those eating the high-protein diet, spent less time in torpor, and thus lost more body mass during hibernation. Despite similar body conditions in both groups at the start of reproduction, the group fed the high-protein diet had higher reproductive success, with more numerous and larger pups than in the high-lipid group. This study reveals that the macronutrient content of diets affects the different phases of the annual lifecycle in hamsters, each of which affects the next. Thus, a high-lipid diet induces less torpor use during hibernation because of a better prehibernation body condition and negatively impacts subsequent reproduction.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Reprodução
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Proteínas Alimentares
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Estado Nutricional
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Dieta Rica em Proteínas
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Hibernação
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Fenômenos Fisiológicos da Nutrição Animal
Limite:
Animals
Idioma:
En
Revista:
Am J Physiol Regul Integr Comp Physiol
Assunto da revista:
FISIOLOGIA
Ano de publicação:
2018
Tipo de documento:
Article
País de afiliação:
França