Relevant bibliographies by topics / Hamster commun – Hibernation

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters

Academic literature on the topic 'Hamster commun – Hibernation'

Author: Grafiati
Published: 4 June 2021
Last updated: 2 February 2022

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Journal articles on the topic "Hamster commun – Hibernation"

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Zaytseva, E. A., M. M. Chunkov, and K. Z. Omarov. "Hibernation Records on the Incisor Surface in the Turkish Hamster (Mesocricetus brandti) (Rodentia, Cricetidae)." Povolzhskiy Journal of Ecology, no. 1 (March 23, 2020): 44–51. http://dx.doi.org/10.35885/1684-7318-2020-1-44-51.

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The teeth of an adult female of the Turkish hamster (Mesocricetus brandti) after hibernation in semi-natural conditions were examined to reveal a relationship between the hibernation pattern on the incisor surface and the data of a temperature logger. The female spent the winter in a burrow prepared by herself inside a wintering cage from October 2018 till May 2019. A temperature logger was implanted to the animal intraperitoneally to record body temperature at 20-min intervals. Regular bouts of hypothermia started in mid-October. The longevity of each hypothermia bout increased whereas the minimum body temperature decreased and reached its lowest value in March. Later, the process proceeded backwards until the end of the heterothermia period. In the apical region of the incisor, daily increments were wide and well-distinguished which indicates that they had formed before the onset of the heterothermal period. In the basal region, closer to the growth zone, the increments were narrow and distinct, and their number corresponded in general to the number of normothermia episodes bouts. At the very base of the incisor as well as at its apical part, typical daily increments were revealed again. However, no correlation between the longevity of normothermia bouts and the width of increments was found. These data varied greatly from two other hamsters. In the Ciscaucasian hamster (Mesocricetus raddei) the number and character of increments comply with the number and duration of normothermia bouts, in the Common hamster (Cricetus cricetus), the “hibernation zone” was not recorded on the incisor surface. The Turkish hamster demonstrate an intermediate pattern, which we explain by quite different hibernation conditions of these species.
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Pluch, Marc, Carina Siutz, and Eva Millesi. "Developmental patterns and body fat content of juvenile common hamsters (Cricetus cricetus l.)." Zoologica Poloniae 58, no. 3-4 (December 1, 2013): 71–85. http://dx.doi.org/10.2478/zoop-2013-0006.

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Abstract The common hamster (Cricetus cricetus) is a facultative hibernator producing up to three litters per year. Juveniles born late in the season have less time to grow and prepare for the winter than early-born ones. We investigated a free-ranging population in an urban environment in Vienna, Austria. We compared body mass, proportion of body fat, as well as head, tibia and hind foot length between juveniles of first and second litters at natal emergence, four weeks post-emergence and shortly before onset of hibernation. In addition we tested for differences in growth rates during the first four weeks after emergence and for potential effects of sex and litter size. Capture-mark-recapture techniques were applied. Body fat content was calculated using a multiple regression model integrating morphometric parameters. At natal emergence, second litter offspring were larger and heavier than those of first litters. Litter size did not account for these differences. During the first week after natal emergence, first litter pups gained body mass faster, and during the first two weeks also showed faster head and tibia growth rates than second litter pups. Four weeks after natal emergence, however, second litter juveniles were still larger and heavier than first litter ones. Body fat content four weeks post-emergence did not differ between first and second litters but decreased with litter size. Shortly before onset of hibernation, however, first litter juveniles, which had more time to grow and accumulate body fat, exceeded second-litter ones in all measured parameters. In all litters investigated, we found no sex difference at natal emergence but males were heavier and larger than females four weeks thereafter demonstrating that the commonly known sexual dimorphism in this species developed during this period. Considering the time constraints late born juveniles face, the con ditional advance at natal emergence is assumed to be adaptive by increasing the chances for these individuals to survive overwinter despite the limited time to prepare for the hibernation period
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Gubbels, R. E. M. B., J. J. van Gelder, and A. Lenders. "Thermotelemetric study on the hibernation of a common hamster, Cricetus cricetus (Linnaeus, 1758), under natural circumstances." Bijdragen tot de Dierkunde 59, no. 1 (1989): 27–31. http://dx.doi.org/10.1163/26660644-05901002.

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4

Siutz, Carina, Matthias Nemeth, Karl-Heinz Wagner, Ruth Quint, Thomas Ruf, and Eva Millesi. "Effects of food store quality on hibernation performance in common hamsters." PLOS ONE 12, no. 10 (October 18, 2017): e0185913. http://dx.doi.org/10.1371/journal.pone.0185913.

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Deboer, T., and I. Tobler. "Natural hypothermia and sleep deprivation: common effects on recovery sleep in the Djungarian hamster." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 271, no. 5 (November 1, 1996): R1364—R1371. http://dx.doi.org/10.1152/ajpregu.1996.271.5.r1364.

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Sleep, daily torpor, and hibernation have been considered to be homologous processes. However, in the Djungarian hamster, daily torpor is followed by an increase in slow-wave activity (SWA; electroencephalogram power density 0.75-4.0 Hz) that is similar to the increase observed after sleep deprivation. A positive correlation was found between torpor episode length and the subsequent increase in SWA, which was highest when SWA was assumed to increase with a saturating exponential function. Thus the increase in SWA propensity during daily torpor followed similar kinetics as during waking, supporting the hypothesis that when the animal is in torpor it is incurring a sleep debt. An alternative hypothesis, proposing that the mode of arousal causes the subsequent SWA increase, was tested by warming the animals during emergence from daily torpor. Irrespective of mode of arousal, more non-rapid eye movement (NREM) sleep and a similar SWA increase was found after torpor. The data are compatible with a putative neuronal restorative function for sleep associated with the expression of SWA in NREM sleep. During torpor, when brain temperature is low, this function is inhibited, whereas the need for restoration accumulates. Recovery takes place only after return to euthermia.
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Klevezal, G. A., E. A. Zaytseva, D. V. Shchepotkin, N. Yu Feoktistova, M. M. Chunkov, and A. V. Surov. "Is There a Record of Hibernation on the Surface of Incisors in the Common Hamster (Cricetus cricetus, Rodentia, Cricetidae)?" Biology Bulletin 47, no. 8 (December 2020): 1043–50. http://dx.doi.org/10.1134/s1062359020080063.

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7

Siutz, Carina, Claudia Franceschini, and Eva Millesi. "Sex and age differences in hibernation patterns of common hamsters: adult females hibernate for shorter periods than males." Journal of Comparative Physiology B 186, no. 6 (May 2, 2016): 801–11. http://dx.doi.org/10.1007/s00360-016-0995-z.

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Turbill, Christopher, Steve Smith, Caroline Deimel, and Thomas Ruf. "Daily torpor is associated with telomere length change over winter in Djungarian hamsters." Biology Letters 8, no. 2 (September 14, 2011): 304–7. http://dx.doi.org/10.1098/rsbl.2011.0758.

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Ageing can progress at different rates according to an individual's physiological state. Natural hypothermia, including torpor and hibernation, is a common adaptation of small mammals to survive intermittent or seasonal declines in environmental conditions. In addition to allowing energy savings, hypothermia and torpor have been associated with retarded ageing and increased longevity. We tested the hypothesis that torpor use slows ageing by measuring changes in the relative telomere length (RTL) of Djungarian hamsters, Phodopus sungorus , a highly seasonal rodent using spontaneous daily torpor, over 180 days of exposure to a short-day photoperiod and warm (approx. 20°C) or cold (approx. 9°C) air temperatures. Multi-model inference showed that change in RTL within individuals was best explained by positive effects of frequency of torpor use, particularly at low body temperatures, as well as the change in body mass and initial RTL. Telomere dynamics have been linked to future survival and proposed as an index of rates of biological ageing. Our results therefore support the hypothesis that daily torpor is associated with physiological changes that increase somatic maintenance and slow the processes of ageing.
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Siutz, Carina, Margit Valent, Viktoria Ammann, Ariane Niebauer, and Eva Millesi. "Sex-specific effects of food supplementation on hibernation performance and reproductive timing in free-ranging common hamsters." Scientific Reports 8, no. 1 (August 30, 2018). http://dx.doi.org/10.1038/s41598-018-31520-4.

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Dissertations / Theses on the topic "Hamster commun – Hibernation"

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Gautier, Célia. "Variation de l’expression génique au cours de l’hibernation du hamster d’Europe : un rôle des récepteurs à la mélatonine ?" Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAJ011/document.

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Afin de faire face aux conditions environnementales défavorables, certains animaux réduisent drastiquement leur activité métabolique et leur température grâce à des phases de torpeur hivernal. L’objectif de cette étude est d’établir une signature moléculaire de chacune des phases d’hibernation. Pour cela, les variations d’expression de 21 gènes impliqués dans le contrôle des fonctions saisonnières (horloge circadienne, hormones thyroïdiennes, récepteurs à la mélatonine) et le métabolisme ont été étudiées dans 8 organes. Les résultats ont mis en évidence une augmentation ubiquitaire de l’expression des gènes Périodes indiquant un possible réajustement de l’horloge au début de la phase de réveil. Ainsi qu’une régulation spécifique des déiodinases induisant une augmentation de la synthèse de thyroxine dans le tissu adipeux brun et l’hypothalamus pendant la torpeur et le réveil. Le récepteur MT2 du hamster d’Europe a été partiellement caractérisé génétiquement et pharmacologiquement. A la différence d’autres espèces de hamster dont le récepteur MT2 est tronqué, le récepteur étudié semble être fonctionnel pour la mélatonine et pourrait être critique durant l’hibernation
Living in the wild involves to cope with a variable seasonal environment availability. When winter is coming, animals use various strategies to adapt to hostile environment by limiting energy expenditure such as hibernation. In this study, expression of 21 selected genes was compared at different states of the hibernation cycle of the true hibernator European hamster. Level of mRNA encoding proteins involved in seasonal timing (melatonin receptors, thyroid metabolism, clock) and energy homeostasis were measured by digital droplet PCR in eight central and peripheral organs. During the arousal phase, Periods genes expression is increased in all organs indicating a possible resetting of body’s clocks at the beginning of the active period. The brown adipose tissue displays a specific regulation of deiodinases leading to increased synthesis of thyroxine during both torpor and arousal. The melatonin receptor MT2 of the European hamster had been partially cloned and pharmacologically characterized. While in most hamster species, MT2 is a natural knock out, the studied receptor seems to be functional and could be critical during hibernation
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Book chapters on the topic "Hamster commun – Hibernation"

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Siutz, Carina, Marc Pluch, Thomas Ruf, and Eva Millesi. "Sex Differences in Foraging Behaviour, Body Fat and Hibernation Patterns of Free-Ranging Common Hamsters." In Living in a Seasonal World, 155–65. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-28678-0_14.

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