ON TRAVAILLE POUR LE HAMSTER - LES P'TITS BONZOMS

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Molecular phylogeny of the Cricetinae subfamily based on the mitochondrial cytochrome b and 12S rRNA genes and the nuclear vWF gene" (PDF). Syrian hamsters are seasonal breeders and will produce several litters a year with several pups in each litter. They are also particularly sensitive to high-pitched noises and can hear and communicate in the ultrasonic range. Fritzsche indicated although some species have been observed to show more nocturnal activity than others, they are all primarily crepuscular.

Mother hamsters can also use their sense of smell to find their own babies and identify which ones are not theirs. The best-known species of hamster is the golden or Syrian hamster ( Mesocricetus auratus), which is the type most commonly kept as pets.Taxonomists generally disagree about the most appropriate placement of the subfamily Cricetinae within the superfamily Muroidea. One extinct hamster of Cricetus, for example, lived in North Africa during the Middle Miocene, but the only extant member of that genus is the European or common hamster of Eurasia.

Effect of Exercise on Photoperiod-Regulated Hypothalamic Gene Expression and Peripheral Hormones in the Seasonal Dwarf Hamster Phodopus sungorus". The coat of the winter white dwarf hamster ( Phodopus sungorus) turns almost white during winter (when the hours of daylight decrease). After that, she was happy since all she wanted from him was hardcore sex, which he provided with the satisfaction of his large cock. In the wild Syrian hamsters can hibernate and allow their body temperature to fall close to ambient temperature. These include the maned hamster, or crested hamster, which is really the maned rat ( Lophiomys imhausi).Laboratory hamsters have not lost their ability to dig burrows; in fact, they will do this with great vigor and skill if they are provided with the appropriate substrate. Both Syrian and Russian hamsters mature quickly and can begin reproducing at a young age (4–5 weeks), whereas Chinese hamsters will usually begin reproducing at two to three months of age, and Roborovskis at three to four months of age.