Difference between revisions of "AY Honors/Small Mammal Pets/Answer Key"

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{{Taxobox
 
{{Taxobox
 
| color = pink
 
| color = pink
| name = Chinese Hamster
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| name = Roborovski Hamster
| image = Chinese Hamster.jpg
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| image = Roborovski hamster.jpg
 
| image_width = 220px
 
| image_width = 220px
| image_caption = Chinese hamster, white-spotted type
 
 
| regnum = [[Animal]]ia
 
| regnum = [[Animal]]ia
| phylum = [[Chordate|Chordata]]
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| phylum = [[Chordata]]
 
| classis = [[Mammal]]ia
 
| classis = [[Mammal]]ia
| ordo = [[Rodentia]]
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| ordo = [[Rodent]]ia
 
| familia = [[Cricetidae]]
 
| familia = [[Cricetidae]]
| genus = ''[[Cricetulus]]''
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| subfamilia = [[Cricetinae]]
| species = '''''C. griseus'''''
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| genus = ''[[Phodopus]]''
| binomial = ''Cricetulus griseus''
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| species = '''''P. roborovski'''''
 +
| binomial = ''Phodopus roborovski''
 +
| binomial_authority = ([[K. A Satunin|Satunin]], 1903)
 
}}
 
}}
The '''Chinese Hamster''' is a species of [[hamster]], scientific name ''Cricetulus griseus'', which originate in the [[desert]]s of northern [[China]] and [[Mongolia]]. These animals grow to between 7.5 and 9 cm in length and as adults can weight 50-75 grams. They live two to three years on average.
 
  
A Chinese hamster's body proportions, compared with those of other hamsters, appear "long and thin" and they have (for a hamster) a relatively long tail. Chinese hamsters are not, technically, [[dwarf hamster|"dwarf" hamsters]] since this term refers to animals in the genus ''Phodopus'', (the two types of [[Phodopus sungorus|Russian Dwarf Hamster]]s and [[Phodopus roborovski|Roborovskii Dwarf Hamster]]s).
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'''Roborovskis''' ('''''Phodopus roborovski''''') are the smallest and fastest of all [[hamster]]s and are commonly kept as [[pet]]s. A distinguishing characteristic of the Roborovskis are the white spots where their eyebrows would be. On average, they live the longest of any pet hamsters, on average three to three and a half years of age.
  
The wild colour is greyish brown above with a black stripe down the spine and a whitish bellyThis colouration, combined with their lithe build and longer tail, makes them look "mousy" to some eyes and, in fact, they are members of the group called [[ratlike hamster|ratlike hamsters]]. Besides the wild colour, a well-known variation is the white-spotted Chinese hamster, which often is greyish white all over, with only a dark stripe on its back.
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They are very curious, however easily startled and generally quite shyThey are social and, when socialised from an early age, sleep together in one place. They are not usually reccommended for families with children, due to their flighty and sensitive temperament. Also, they are not as affectionate as other, more robust breed of hamster. Roborovski hamsters do not like to be held or cuddled, and do not form trusting relationships with humans easily. As they grow to be roughly the size of an adults thumb, they can easily squeeze through the bars of a standard hamster cage, and so careful consideration needs to be given to housing. Because of their size and speed, Roborovski's are best for people who prefer to observe rather than to play with their pet.
  
They have quiet temperaments and are easily handled; one of their endearing traits is that of clinging to a finger with all four paws, rather like a harvest mouse on a corn stalkChinese hamsters can be quite nervous as youngsters but, once they are tame, display an endearing calmness and gentleness of character.
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Because of their size and features, they can be comical pets when observed in social groupsIf kept together in mixed sex pairs or groups Roborovski Hamsters usually start to breed in the spring following the year in which the female was born. Females often become sterile at around 24 months of age but males usually remain fertile for most of their life.
  
In the past, Chinese hamsters were commonly used [[Experimental_animal|laboratory animals]], until they were replaced by the common mouse and rat, which are easier to keep and breed. However, quite a few biotech drugs are still being produced by putting the gene for the protein into [[Chinese_Hamster_Ovary_cell|Chinese hamster ovary (CHO) cells]], which then produce the protein.
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Roborovski hamsters gestate for around 23-30  days. When the young are born they resemble pink beans. At around 5-6 days the skin may start to pigment and at 6-8 days hair begins to emerge. By 10-12 days the babies are covered in short fur and the eyelids are beginning to mature. At this time the babies may also start wandering around the cage, even though still blind. The female will usually collect the wandering babies and return them to the nest - this may be accompanied by squealing from the babies but is not usually anything to worry about. At 14-16 days of age the eyes open and the babies are fully covered in fur.  
  
Of note, some states such as California reguard the Chinese hamster as a pest, and as a result require a special permit to own, breed or sell.  Be sure to check with your local authorities on the subject.
 
  
 
==External links==
 
==External links==
*[http://www.hamstertips.net Hamster Tips and Care]
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*[http://www.hamstertips.net Roborovski Hamster Tips and Care]
 
*[http://www.hamster-heaven.com Hamster Heaven]
 
*[http://www.hamster-heaven.com Hamster Heaven]
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*[http://www.petwebsite.com/hamsters/images/roborovski.jpg Image of a roborovskii]
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*[http://roborovski.tk/ R&R Hamsters (a.k.a. Roborovski Hideout)]
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[[Category:Hamsters]]
  
 
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[[de:Roborowski-Zwerghamster]]
[[Category:Hamsters]]
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[[fr:Hamster de Roborovski]]
[[fr:Cricetulus]]
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[[ja:ロボロフスキーハムスター]]
[[nl:Chinese dwerghamster]]
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[[pl:Chomik Roborowskiego]]
[[pl:Chomik chiński]]
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[[zh:沙漠侏儒倉鼠]]

Revision as of 23:05, 18 June 2006

Template:Taxobox

Roborovskis (Phodopus roborovski) are the smallest and fastest of all hamsters and are commonly kept as pets. A distinguishing characteristic of the Roborovskis are the white spots where their eyebrows would be. On average, they live the longest of any pet hamsters, on average three to three and a half years of age.

They are very curious, however easily startled and generally quite shy. They are social and, when socialised from an early age, sleep together in one place. They are not usually reccommended for families with children, due to their flighty and sensitive temperament. Also, they are not as affectionate as other, more robust breed of hamster. Roborovski hamsters do not like to be held or cuddled, and do not form trusting relationships with humans easily. As they grow to be roughly the size of an adults thumb, they can easily squeeze through the bars of a standard hamster cage, and so careful consideration needs to be given to housing. Because of their size and speed, Roborovski's are best for people who prefer to observe rather than to play with their pet.

Because of their size and features, they can be comical pets when observed in social groups. If kept together in mixed sex pairs or groups Roborovski Hamsters usually start to breed in the spring following the year in which the female was born. Females often become sterile at around 24 months of age but males usually remain fertile for most of their life.

Roborovski hamsters gestate for around 23-30 days. When the young are born they resemble pink beans. At around 5-6 days the skin may start to pigment and at 6-8 days hair begins to emerge. By 10-12 days the babies are covered in short fur and the eyelids are beginning to mature. At this time the babies may also start wandering around the cage, even though still blind. The female will usually collect the wandering babies and return them to the nest - this may be accompanied by squealing from the babies but is not usually anything to worry about. At 14-16 days of age the eyes open and the babies are fully covered in fur.


External links

de:Roborowski-Zwerghamster fr:Hamster de Roborovski ja:ロボロフスキーハムスター pl:Chomik Roborowskiego zh:沙漠侏儒倉鼠