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

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{{Taxobox
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''This article concerns a particular breed of rabbit, the Netherland dwarf.  For information on domestic rabbits in general, see [[Domestic rabbit]].''
| color = pink
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''For information on the country, see [[Netherlands]]''
| name = Syrian or Golden Hamster
 
| status = EN
 
| status_system = iucn2.3
 
| image = Golden_hamster_front_1.jpg
 
| image_width = 250px
 
| regnum = [[Animal]]ia
 
| phylum = [[Chordate|Chordata]]
 
| subphylum = [[Vertebrate|Vertebrata]]
 
| classis = [[Mammal]]ia
 
| ordo = [[Rodent]]ia
 
| subordo = [[Myomorpha]]
 
| superfamilia = [[Muroidea]]
 
| familia = [[Cricetidae]]
 
| subfamilia = [[Cricetinae]]
 
| genus = ''[[Mesocricetus]]''
 
| species = '''''M. auratus'''''
 
| binomial = ''Mesocricetus auratus''
 
| binomial_authority = [[George Robert Waterhouse|Waterhouse]], 1839
 
}}
 
  
The '''Syrian Hamster''' or '''Golden Hamster''', ''Mesocricetus auratus'', is the best known member of the [[rodent]] [[subfamily]] [[Cricetinae]], the [[hamster]]s. In the wild they are now considered endangered <ref>{{IUCN2006|assessors=Baillie|year=1996|id=13219|title=Mesocricetus auratus|downloaded=09 May 2006}} Listed as Endangered (EN B1+2c v2.3)</ref>, but are popular as housepets and scientific research animals.  Adults grow from 5 to 7 inches (12.5 to 17.5 cm ) in length, and will usually have a lifespan of 2 to 3 years.
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[[Image:Netherlanddwarfbunny.jpg|right|thumb|A pet Netherland Dwarf]]
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The '''Netherland Dwarf''' is a popular [[breed]] of [[domestic rabbit]] (''Oryctolagus cuniculus'').  Smaller than most [[List of rabbit breeds|rabbit breeds]], Netherland dwarf rabbits weigh 1 to 3 [[pound (mass)|lb]] (0.5 to 1.4 kg) and are usually kept as [[pet]]s or exhibition animals.  They are not typically used as sources of [[meat]] or [[fur]] because their small size makes them inefficient for these purposes.
  
==Biology==hi
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Most rabbits sold in [[pet store]]s are Netherland dwarfs, Netherland dwarf-[[selective breeding|derived breeds]] (often referred to simply as ''[[#Dwarf breeds|dwarf breeds]]''), or dwarf [[hybrid|crosses]].  Their popularity as pets stems from their [[baby]]ish appearance and their [[cage]] space requirement, which is smaller than that of larger rabbit breeds, although they should be given a reasonably large exercise run because of their energetic characters.
  
Like most members of the subfamily, the Syrian Hamster has expandable cheek pouches, which extend from its cheeks to its shoulders.  In the wild, hamsters are [[larder hoarding|larder hoarders]]; they use their cheek pouches to transport food to their burrowsTheir name in the local [[Arabic language|Arabic]] dialect where they were found translates to "father of saddlebags" due to the remarkable amount of storage space in their cheek pouchesIf food is plentiful, they will store it in large amounts--it has been reported that 25 kg of grain was found in the burrow of a single hamster.
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==History==
 
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The Netherland dwarf was first bred in the [[Netherlands]], as its name implies, in the early [[20th century]].  Medium-sized rabbits of various breeds were bred with wild [[European rabbit]]s of unusually small size; after several generations the resulting animal was a very small domestic rabbit available in a wide variety of colors and patternsNetherland dwarfs were first imported into the [[United Kingdom]] in the [[1950s]].  In the [[1960s]] and [[1970s]] the [[United States]] imported its first Netherland dwarf rabbits.
[[Image:Hamst08082002.JPG|thumb|left|Syrian hamster filling its cheek pouches with dandelion leaves.]]
 
Sexually mature female hamsters come into season ([[oestrus]]) every four daysPutting a male and female hamster together when the female is not in heat may result in the female attacking the male.  Syrian Hamsters have the shortest gestation period in any known mammal at only 16 to 18 days.  They can produce large litters of 20 or more young, although the average litter size is 8.  If a mother hamster is inexperienced or feels threatened, she may abandon or even cannibalise her pups. It is inadvisable for inexperienced owners to breed them.
 
  
Most hamsters in American and British pet stores are Syrian Hamsters.  Originally, Syrian Hamsters came in just one colour — the mixture of brown, black, and gold which gave them their "Golden" name — but they have since developed a myriad of colour mutations such as cream, white, blonde, banded, tortoiseshell, calico, and sable.  Therefore in pet stores today, ''Golden Hamster'' is only used to label the original coloration (also known as agouti).  Other-coloured short-hairs are banded under the label ''Fancy Hamster''.  ''Teddy Bear'' is a term used to describe the long-haired variety of the Syrian Hamster, named so for their remarkable resemblance to toy teddy bears.  They are also sometimes known as "angora hamsters".  Male teddy bear hamsters usually have much longer fur than the female variety, culminating in a "skirt" of longer fur around their backsides.  ''Black Bears'' are a recent off-shoot of teddy bear hamsters (mutation discovered in 1985), with their major difference being their black-coloured fur. It can be argued that black bears are just black teddy bears rather than their own breed; on the other hand, black bears were originally selectively bred for their larger size and more docile nature as well as their colour.  However, in current stock, this may or may not still be the case.  
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Early dwarfs, even into the 1970s and [[1980s]], had fearful and sometimes aggressive [[temperament]]s as a result of [[breeder]]s selecting [[breeder (animal)|breeding animals]] for size, not [[personality]]. These rabbits behaved more like [[wild]] rabbits than domestic animals and did not make good pets.  However, through generations of [[selective breeding]], the modern Netherland dwarf has become a gentle, friendly pet rabbit, though it still retains a more energetic disposition than larger breeds.
  
Syrian Hamsters are wildly popular as housepets due to their docile, inquisitive natures and small size.  They are popular as "first pets" for young children, as well as being classroom animals, because of their hardiness and relative ease of care.  Some pet owners find them more attractive in relation to rats and other rodents due to their lack of visible tails.  Syrian Hamsters are notoriously territorial, however.  Even tame Syrian Hamsters will frequently attack and, indeed, kill, other adult hamstersWhen kept as pets, Syrians must be housed in single sex groups after the age of six weeks, and housed individually by the time they are ten weeks old.
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==Appearance==
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[[Image:Netherlanddwarf-loki.jpg|thumb|right|Young Netherland dwarf in a mismarked Himalayan pattern]]
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[[Purebred]] Netherland dwarfs come in a wide variety of colors, including [[List of rabbit breeds#Himalayan|Himalayan]], Black, Blue, Chocolate, Lilac, Smoke Pearl, Sable Point, Tortoiseshell, Chestnut, Siamese Sable, Opal, Lynx, Squirrel, [[List of rabbit breeds#Chinchilla|Chinchilla]], Otter, Tan, Silver Marten, Sable Marten, Smoke Pearl Marten, Orange, Fawn, Steel, Blue-Eyed White and Ruby Eyed WhiteOther colors (including ''mismarks'') exist in non-show-quality Netherland dwarfs and in dwarf [[mongrel]] rabbits.
  
Syrian Hamsters have also been used in scientific research — in the study of many diseases, as well as in the study of behaviourThey have a number of [[fixed action pattern]]s that are readily observed, including scent-marking.  They are particularly used in airway and respiratory physiology research.
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Netherland dwarfs' [[head]]s and [[eye]]s are disproportionately large with respect to their bodies, and their ears are tiny and carried high on the head.  Additionally, their faces are rounded and shortenedThese features, a part of the animals' [[dwarfism]], cause them to look [[infant]]ile even into [[adulthood]].
  
== Discovery ==
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Dwarf crosses frequently retain some of these characteristics, depending on the breed the dwarf is crossed with.  However, crosses rarely look as babyish as the [[purebred]] dwarfs and are usually somewhat larger.
  
[[Image:hamster.jpg|thumb|right|dark-eared white hamster]]
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==Netherland dwarfs as pets==
In [[1839]] [[Britain|British]] [[zoologist]] [[George Robert Waterhouse]] reportedly found an elderly female hamster in Syria, naming it ''Cricetus auratus,'' the Golden Hamster.  The hamster's fur was on display at the [[British Museum (Natural History)]].  The Syrian Hamster was then ignored by European science for the next century.
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:''Main article: [[Domestic rabbit#Rabbits as Pets|Domestic rabbit]]''
  
In 1930, [[Israel Aharoni]], a zoologist and professor at the [[Hebrew University of Jerusalem]], captured a mother hamster and her litter of babies in the [[Syria|Syrian]] desert.  By the time he got back to his lab, most had died or escaped.  The remaining three hamsters were given to his university, where they were successfully bred.  Because they were a bit bigger than the ones Waterhouse found, they were named ''Mesocricetus auratus''.  ''Mesocricetus auratus'' is the currently accepted scientific name of the Syrian Hamster.
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===Behavior===
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Netherland dwarf rabbits have the same basic behavioral traits as other domestic rabbits. They can be litter-trained and socialized with [[dog]]s and [[cat]]s.  
  
Descendants of these hamsters were shipped to scientific labs around the world for use as research animals.  They arrived in the [[United Kingdom]] in 1931, and reached the United States in 1938Soon after their initial discovery, they were found to make great petsJust about all captive Syrian Hamsters today are descended from the original litter found in Syria, except for a few that were brought into the United States by travellers who found them in the desert. A separate stock of hamsters was imported into the US in 1971, but it is not known if any of today's North American pets are descended from them.
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They tend to have [[wikt:spunky|spunkier]] and more energetic [[temperament]]s than larger breeds of rabbit and are rarely content to sit still when outside of the cageThey are curious animals and have a tendency to nibble on nearby objects and even human beingsHowever, they are extremely fragile animals and easily stressed, and as such they do not make good pets for young children.''' Please keep them away from babies alittle scwirmish.'''[[Image:Example.jpg]]
  
==Surviving in the wild==
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===Diet===
In the beginning of the 20th century, the Syrian golden hamster was considered as being extinct in the wild by unknown reason until Professor Aharoni of Jerusalem Hebraic University collected one female and her 12 broods in [[Aleppo]].<ref name="Hochman"> Hochman B, Ferreira LM, Vilas Bôas FC, Mariano M. Experimental model in hamster (Mesocricetus auratus) to study heterologous graft of scars and cutaneous diseases in plastic surgery. Acta Cir Bras [serial online] 2004 Vol 19 Special Edition. [http://www.scielo.br/pdf/acb/v19s1/v19s1a12.pdf Online pdf]</ref> After that some later sightings and captures were reported. Since the 1980s this species was not seen anymore in the wild, until two expeditions were carried out during September [[1997]] and March [[1999]] to confirm the current existence of the wild golden hamster in northern [[Syria]]. The researchers mapped 30 burrows. None of the inhabited burrows contained more than one adult. They caught six females and seven males. One female was pregnant and gave birth to six pups. All these 19 caught wild golden hamsters, together with three wild individuals from the University of Aleppo, were shipped to [[Germany]] to form a new breeding stock.<ref name="Gattermann">Gattermann et al. 2001. Notes on the current distribution and the ecology of wild golden hamsters (Mesocricetus auratus). Journal of Zoology, 254: 359-365 (Cambridge University Press). [http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=78463 Online abstract]</ref>
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Like other domestic rabbits, dwarf rabbits consume [[grasses]], [[cereal|grains]], and other succulent [[Leaf vegetable|greens]]. Their [[digestive system]] is somewhat less hardy than their larger cousins, and many leafy vegetables such as lettuce and cabbage can give them health problems. Generally [[hay]] and a [[pellet]]ed feed should make up the largest portion of their diet.
  
==Gallery==
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==Dwarf breeds==
<gallery>
 
Image:100_983.jpg|A Golden Hamster
 
Image:Golden_hamster_side_1.jpg|Golden Hamster
 
image:Jan2306_122.jpg|male teddy bear hamster
 
</gallery>
 
  
==See also==
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Rabbit breeds derived from breeding larger rabbits with the Netherland dwarf are known as ''dwarf breeds''.  Most smaller breeds, like the Mini-Rex, the Jersey Wooly, and the Holland lop, are results of such breedings.  Generally dwarf breeds are slightly larger than the typical Netherland dwarf, not growing larger than 4 to 5 lb (1.8 to 2.3 kg).  Most have shortened faces compared to larger rabbits, and some even preserve the rounded [[head]], large [[eye]]s, or small [[ear]]s of the Netherland dwarf.
*[[Hamster]]
 
  
==References==
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Most dwarf breeds are intended to bring a specialized characteristic, such as a specific fur type, into a smaller rabbit.  Mini-Rex were created through the breeding of dwarfs with [[List of rabbit breeds#Rex|Rex]] rabbits, a fur breed with a short, [[plush]] coat, and retain both the dwarf's size and the Rex fur.  Jersey Woolies are a dwarf version of the [[Angora rabbit]], a [[wool]]-producing breed.  [[List of rabbit breeds#Lop|Lop]]-eared rabbit breeds, interbred with dwarfs, were used to create [[Holland Lop]] and Mini-lop rabbits.
<references/>
 
  
==External links==
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==See also==
*[http://www.syrianhamster.com Syrian Hamster]
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* [[List of rabbit breeds]]
*[http://www.hamster-heaven.com Hamster Heaven]
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* [[American Rabbit Breeders' Association]]
*[http://www.hamsterific.com Hamsterific.com]
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* [[Cuteness]]
*[http://www.hamster-care.com/breeds.html Syrian Hamsters] - Syrian Hamsters and other breeds
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* [[Dwarf rabbit]]
 
 
*[http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&id=10036&lvl=3&keep=1&srchmode=1&unlock Genome information]
 
*[http://www.petwebsite.com/hamsters/syrian_hamsters.htm Petwebsite Entry on Syrians]
 
*[http://hometown.aol.com/TheRiverRd/ The River Road Hamstery]- Very good information on hamster breeding, especially for coat types
 
*[http://www.hamsoc.org.uk/varieties.php The Hamster Society]
 
*[http://www.razthehamster.com/gallery RaztheHamster] - Syrian Hamster Gallery
 
  
[[Category:Animals kept as pets]]
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[[Category:Rabbits as pets]]
[[Category:Hamsters]]
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[[Category:Leporids]]
[[Category:Mammals of Asia]]
 
  
[[bg:Златист хамстер]]
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[[zh:荷蘭侏儒兔]]
[[da:Guldhamstere]]
 
[[de:Goldhamster]]
 
[[fr:Hamster doré]]
 
[[it:Mesocricetus auratus]]
 
[[he:אוגר זהוב]]
 
[[nl:Goudhamster]]
 
[[ja:ゴールデンハムスター]]
 
[[nn:Syrisk hamster]]
 
[[pl:Chomik syryjski]]
 
[[fi:Kultahamsteri]]
 
[[sv:Guldhamster]]
 
[[zh:敘利亞倉鼠]]
 

Revision as of 23:21, 19 December 2006

This article concerns a particular breed of rabbit, the Netherland dwarf. For information on domestic rabbits in general, see Domestic rabbit. For information on the country, see Netherlands

A pet Netherland Dwarf

The Netherland Dwarf is a popular breed of domestic rabbit (Oryctolagus cuniculus). Smaller than most rabbit breeds, Netherland dwarf rabbits weigh 1 to 3 lb (0.5 to 1.4 kg) and are usually kept as pets or exhibition animals. They are not typically used as sources of meat or fur because their small size makes them inefficient for these purposes.

Most rabbits sold in pet stores are Netherland dwarfs, Netherland dwarf-derived breeds (often referred to simply as dwarf breeds), or dwarf crosses. Their popularity as pets stems from their babyish appearance and their cage space requirement, which is smaller than that of larger rabbit breeds, although they should be given a reasonably large exercise run because of their energetic characters.

History

The Netherland dwarf was first bred in the Netherlands, as its name implies, in the early 20th century. Medium-sized rabbits of various breeds were bred with wild European rabbits of unusually small size; after several generations the resulting animal was a very small domestic rabbit available in a wide variety of colors and patterns. Netherland dwarfs were first imported into the United Kingdom in the 1950s. In the 1960s and 1970s the United States imported its first Netherland dwarf rabbits.

Early dwarfs, even into the 1970s and 1980s, had fearful and sometimes aggressive temperaments as a result of breeders selecting breeding animals for size, not personality. These rabbits behaved more like wild rabbits than domestic animals and did not make good pets. However, through generations of selective breeding, the modern Netherland dwarf has become a gentle, friendly pet rabbit, though it still retains a more energetic disposition than larger breeds.

Appearance

Young Netherland dwarf in a mismarked Himalayan pattern

Purebred Netherland dwarfs come in a wide variety of colors, including Himalayan, Black, Blue, Chocolate, Lilac, Smoke Pearl, Sable Point, Tortoiseshell, Chestnut, Siamese Sable, Opal, Lynx, Squirrel, Chinchilla, Otter, Tan, Silver Marten, Sable Marten, Smoke Pearl Marten, Orange, Fawn, Steel, Blue-Eyed White and Ruby Eyed White. Other colors (including mismarks) exist in non-show-quality Netherland dwarfs and in dwarf mongrel rabbits.

Netherland dwarfs' heads and eyes are disproportionately large with respect to their bodies, and their ears are tiny and carried high on the head. Additionally, their faces are rounded and shortened. These features, a part of the animals' dwarfism, cause them to look infantile even into adulthood.

Dwarf crosses frequently retain some of these characteristics, depending on the breed the dwarf is crossed with. However, crosses rarely look as babyish as the purebred dwarfs and are usually somewhat larger.

Netherland dwarfs as pets

Main article: Domestic rabbit

Behavior

Netherland dwarf rabbits have the same basic behavioral traits as other domestic rabbits. They can be litter-trained and socialized with dogs and cats.

They tend to have spunkier and more energetic temperaments than larger breeds of rabbit and are rarely content to sit still when outside of the cage. They are curious animals and have a tendency to nibble on nearby objects and even human beings. However, they are extremely fragile animals and easily stressed, and as such they do not make good pets for young children. Please keep them away from babies alittle scwirmish.Example.jpg

Diet

Like other domestic rabbits, dwarf rabbits consume grasses, grains, and other succulent greens. Their digestive system is somewhat less hardy than their larger cousins, and many leafy vegetables such as lettuce and cabbage can give them health problems. Generally hay and a pelleted feed should make up the largest portion of their diet.

Dwarf breeds

Rabbit breeds derived from breeding larger rabbits with the Netherland dwarf are known as dwarf breeds. Most smaller breeds, like the Mini-Rex, the Jersey Wooly, and the Holland lop, are results of such breedings. Generally dwarf breeds are slightly larger than the typical Netherland dwarf, not growing larger than 4 to 5 lb (1.8 to 2.3 kg). Most have shortened faces compared to larger rabbits, and some even preserve the rounded head, large eyes, or small ears of the Netherland dwarf.

Most dwarf breeds are intended to bring a specialized characteristic, such as a specific fur type, into a smaller rabbit. Mini-Rex were created through the breeding of dwarfs with Rex rabbits, a fur breed with a short, plush coat, and retain both the dwarf's size and the Rex fur. Jersey Woolies are a dwarf version of the Angora rabbit, a wool-producing breed. Lop-eared rabbit breeds, interbred with dwarfs, were used to create Holland Lop and Mini-lop rabbits.

See also

zh:荷蘭侏儒兔