European Rabbit


European Rabbit
European Rabbit[1]
Conservation status
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Lagomorpha
Family: Leporidae
Genus: Oryctolagus
Lilljeborg, 1873
Species: O. cuniculus
Binomial name
Oryctolagus cuniculus
(Linnaeus, 1758)
Range map

The European Rabbit or Common Rabbit (Oryctolagus cuniculus) is a species of rabbit native to south west Europe (Spain and Portugal) and north west Africa (Morocco and Algeria).[3] It has been widely introduced elsewhere often with devastating effects on local biodiversity. However, its decline in its native range (caused by the diseases myxomatosis and rabbit calicivirus as well as over-hunting and habitat loss) has caused the decline of its highly dependent predators, the Iberian Lynx and the Spanish Imperial Eagle. It is known as an invasive species for the fact it has been introduced to countries on all continents with the exception of Antarctica and Sub-saharan Africa, and caused many problems within the environment and ecosystems as well. Australia has the most problems with European Rabbits, due to the lack of natural predators there.

The European Rabbit is well-known for digging networks of burrows, called warrens, where it spends most of its time when not feeding. Unlike the related hares (Lepus), rabbits are altricial, the young being born blind and furless, in a fur-lined nest in the warren, and they are totally dependent upon their mother. Much of the modern research into wild rabbit behaviour was carried out in the 1960s by two research centres. One was the naturalist Ronald Lockley who maintained a number of large enclosures for wild rabbit colonies, with observation facilities, in Orielton in Pembrokeshire. Apart from publishing a number of scientific papers, he popularised his finding in a book The Private Life of the Rabbit.,[4] which is credited by Richard Adams as having played a key role in his gaining "a knowledge of rabbits and their ways" that was espoused in the novel Watership Down. The other group was the Commonwealth Scientific and Industrial Research Organisation (CSIRO) in Australia where Mykytowycz & Myers performed numerous studies of the social behaviour of wild rabbits. Since the onset of myxomatosis and the decline of the significance of the rabbit as an agricultural pest, few large scale studies have been performed and many aspects of rabbit behaviour are still poorly understood.

Contents

Terminology

Rabbits are known by many names. Young rabbits are known by the names bunny, kit, or kitten. A male rabbit is called a buck, and a female rabbit is called a doe. A group of rabbits is known as a colony or a nest.[5] Colloquially, a rabbit may be referred to as a "coney" or a "bunny", though the former is archaic.

Physical description

A male and female European rabbit (profile)
A male and female European rabbit (face)

The European Rabbit is a small, grey-brown (or sometimes black) mammal ranging from 34–45 cm (13-18 inches) in length, and is approximately 1.3-2.2 kg (3-5 lb) in weight. As a lagomorph, it has four sharp incisors (two on top, two on bottom) that grow continuously throughout its life, and two peg teeth on the top behind the incisors, dissimilar to those of rodents (which have only 2 each, top and bottom). Rabbits have long ears, large hind legs, and short, fluffy tails. Rabbits move by hopping, using their long and powerful hind legs. To facilitate quick movement, a rabbit's hind feet have a thick padding of fur to dampen the shock of rapid hopping. Their toes are long, and are webbed to keep from spreading apart as the animal jumps.

Ecology and behavior

Habitat

Rabbits are gregarious, social animals, living in medium-sized colonies known as warrens. Rabbits are largely crepuscular, being most active around dawn and dusk, although they are not infrequently seen active during the day. During the day, rabbits prefer to reside in vegetated patches which they use for protection from predators.[6] At night, they move into open prairie to feed.[6] Rabbit populations seem to be greatest in ecotone habitats and less in scrublands or grasslands.[7] Rabbits are essentially mixed-feeders, both grazing and browsing, but grass is their primary food source. They nevertheless have a diverse diet of grasses, leaves, buds, tree bark, and roots. They will also eat lettuce, cabbage, root vegetables, and grains. Birds of prey are the primary predators of rabbits in scrublands. [7] Rabbits in grasslands are preyed on by carnivores. Ecotone rabbits are preyed on by both.[7]

Social organization

Rabbit at burrow entrance

Rabbits live in warrens that contain 2-10 other individuals living in smaller groups to ensure greater breeding success.[8] Territoriality and aggression contribute greatly to the rabbits maturation process and help ensure survival of the population.[9] Mature male and females are better at fighting off predators.[9] Females tend to be more territorial than males although the areas that are most frequented by females are not defended.[10] Rabbit mark their territories with dung hills.[11] They expel soft mucus-covered pellets that are then reingested. They also expel larger pellets that are covered with secretion from the anal gland.[12] A rabbit’s success in repelling strangers depends on the potency of the pellets. When young rabbits leave their natal warrens, they settle either in pre-existing territories, unoccupied established territories or become transients.[13] Females tend to move into neighboring territories while males tend to move even farther. Overall, males disperse more than females.[13]

The rabbit mating system is rather complex. Dominant males exhibit polygyny, whereas lower-status individuals (males and females) often form monogamous breeding relationships. Rabbits signal when they are ready to copulate by marking inanimate objects while giving off odoriferous substances though their chin gland, a process known as "chinning".[14] Dominance hierarchies exist in parallel for both males and females. Social rank is based on the amount of group aggression.[15] The dominant buck has greater mobility and more aggression than the dominant doe. This is likely because males have to fight each other for the females.[10] The social hierarchy of males is also determined by a number of other factors, such as the size patrol area, the number of females that visit his area, resting time near females, the number of shelters he visits, and the distance he travels daily.

Rabbits can be extremely aggressive in the wild, and competition between males can often lead to severe injury and death. Although hostile displays are used, and males often squirt urine on challengers as a form of territorial marking, the most common response to a challenge is immediate attack.[4] Rabbits use their powerful back legs as weapons, kicking at an opponent's underside, as well as biting and scratching with the front paws.

Reproduction

European rabbit being killed by a stoat

Rabbits are famed for their reproductive capabilities. Although certainly not the strongest, fastest, or smartest of the mammals, they have carved out a strong ecological niche through their rate of impregnation, due to the fact that female rabbits ovulate at the time of copulation. One striking example of rapid rabbit reproduction took place in Australia, where the 24 rabbits first introduced in 1859 had multiplied in number to over 600 million over the course of less than a century.[16][17]

The gestation cycle for a rabbit averages 31 days, although it can vary anywhere between 29 and 35 days. Litter sizes generally range between two to twelve rabbits. The young are born in a nesting burrow dug by the female, which she returns to once a day for four weeks in order for them to suckle.[18] The rabbit's reproductive abilities were the inspiration for the phrase "breeding like rabbits". They can reproduce from 3–4 months of age. They can produce 4-7 litters of offspring per year, a mature female can be pregnant continuously for 6–8 months. One single pair of mature rabbits are able to produce 30-40 offspring per year. Kittens are born in a nest in an isolated part of the warren. The female build, prepare and defend the nest. A doe will mark the nest with urine and fecal dropping to detract others from invading the site.[19] Does take care of the kittens without help from the bucks. However, bucks show considerable investment in the welfare of young, although much of this aspect of rabbit behavior is poorly understood. It is possible that the males may be trying to enhance their social status by being surrounded by friendly individuals.[9]

A melanistic European rabbit

Humans' relationship with rabbits

Recent research has shown that all European Rabbits carry common genetic markers and descend from one of two maternal lines. These lines originated approximately between 6.5 million and 12,000 years ago when glaciers isolated two herds; one on the Iberian Peninsula and the other in Mediterranean France. It can be surmised that man began hunting rabbit as a food source, but further research needs to occur. Little substantial evidence of man's relationship with the European rabbits is documented until the medieval period.[20]

Humans' relationship with the European (sometimes called true) rabbit was first recorded by the Phoenicians earlier than 1000 BC, when they termed the Iberian Peninsula i-shaphan-ím (literally, the land of the hyraxes). This phrase closely resembles related modern Hebrew: i (אי) meaning island and shafan (שפן) meaning hyrax, plural shfaním (שפנים). Phoenicians called the local rabbits hyraxes because hyraxes resemble rabbits in some ways, and were probably more common than rabbits in their native land (the Levant) at the time. Hyraxes, like rabbits, are not rodents. According to one theory, Romans converted the phrase i-shaphan-ím, with influence by Greek Spania, to its Latin form, Hispania, which evolved into the modern Spanish word España, English Spain, and such other variations of modern languages. The precise meaning of shafan remains unclear, but the balance of opinion appears to indicate that the hyrax is indeed the intended meaning.[21]


The European Rabbit is the only species of rabbit to be domesticated. All pet breeds of rabbits, such as dwarf lops and angoras, are of this species. However, rabbits and humans interact in many different ways beyond domestication. Rabbits are an example of an animal that is treated as food, pet, and pest by members of the same culture. Urbanized European Rabbits descended from pets have become pest problems in some cities. For instance, one of the northernmost populations of the species is now hosted by Helsinki, Finland, with an estimated 2500 animals at the end of 2006 and 5000 in autumn, 2007.[22] Finland's native lagomorphs are the European Hare and the Mountain Hare. In Iceland there are also populations both in Reykjavik and in the Vestmann islands.

As an exotic pest

A European Rabbit afflicted by Myxomatosis
Feral rabbit on a farm in Victoria

The European Rabbit has been introduced as an exotic species into a number of environments, with baleful results to vegetation and local wildlife. Locations include England, where they were introduced, perhaps from France, at first to coastal islands at the end of the twelfth century, then more generally in England in the course of the 13th century;[23] (as of November 2004 there were about 40 million European Rabbits in the British Isles), Laysan Island (1903) and Lisianski Island in the Hawaiian Islands; Macquarie Island; Smith Island, San Juan Island (around 1900) later spreading to the other San Juan Islands; Australia and New Zealand.[citation needed]

Twenty-four European Rabbits were introduced to Australia in 1859 by estate owner Thomas Austin in Victoria. They soon spread throughout the country due to the lack of natural predators, widespread farming producing an ideal habitat, and mild Australian winters allowing them to breed year-round. Australia's equivalent to the rabbit, the Bilby, was quickly pushed out by the rabbits. The bilbies are endangered, but are now making a comeback due to government protection. Between 1901 and 1907, Australia built an immense "rabbit-proof fence" to halt the westward expansion of the introduced rabbit population. The European Rabbit can not only jump very high, but also burrow underground, making fencing especially futile. During the 1950s experiments with introduction of a virus, Myxomatosis cuniiculi provided some relief in Australia but not in New Zealand where the insect vectors necessary for spread of the disease were not present. Myxomatosis can also infect pet rabbits of the same species. Today's remaining wild rabbits in Australia are largely immune to Myxomatosis. The rabbit haemorrhagic disease virus which causes the rabbit haemorrhagic disease has been cleared as a safe form of biological control agent against the European Rabbit in Australia as well.

Domesticated rabbits

The only rabbit to be widely domesticated is the European Rabbit. This rabbit has been extensively domesticated for food or as a pet. It was first widely kept in ancient Rome and was refined into a wider variety of breeds during the Middle Ages.

Domesticated rabbits have mostly been bred to be much larger than wild rabbits, though selective breeding has produced a wide range of breeds which are kept as pets and food animals across the world. They have as much colour variation among themselves as other household pets. Their fur is prized for its softness, and even today Angora rabbits are raised for their long soft fur, which is often spun into yarn. Other breeds are raised for the fur industry, particularly the Rex, which has a smooth velvet like coat and comes in a wide variety of colours and sizes.

In the middle-size breeds, the teeth grow approximately 125 mm (5 in) per year for the upper incisors and about 200 mm (8 in) per year for the lower incisors. The teeth abrade away against one another, giving the teeth a constantly sharp edge.

Status

Portuguese National Authorities (ICNB) have classified the rabbit as Near Threatened in Portugal, whilst Spanish authorities recently re-classified the rabbit as Vulnerable in Spain.[24] In 2008, the European Rabbit was re-classified by the World Conservation Union (IUCN) as "Near Threatened" in its native range due to the extent of recent declines[25]

See also

Lapin01 flipped and colorized.svg Rabbits and hares portal

References

  1. ^ Hoffman, Robert S.; Smith, Andrew T. (16 November 2005). "Order Lagomorpha (pp. 185-211)". In Wilson, Don E., and Reeder, DeeAnn M., eds. Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Baltimore: Johns Hopkins University Press, 2 vols. (2142 pp.). pp. 205–206. ISBN 978-0-8018-8221-0. OCLC 62265494. http://www.bucknell.edu/msw3/browse.asp?id=13500254. 
  2. ^ "Oryctolagus cuniculus". IUCN Red List of Threatened Species. Version 2010.4. International Union for Conservation of Nature. 2008. http://www.iucnredlist.org/apps/redlist/details/41291. Retrieved 26 May 2011.  Database entry includes a brief justification of why this species is Near Threatened
  3. ^ http://animaldiversity.ummz.umich.edu/site/accounts/information/Oryctolagus_cuniculus.html
  4. ^ a b RM Lockley (1964), The Private Life of the Rabbit, Andre Deutsch 
  5. ^ "The collective Noun Page". http://www.ojohaven.com/collectives. Retrieved 2008-01-30. 
  6. ^ a b Moreno, S. and R. D. Villafuerte, Migues (1996). "Cover is safe during the day but dangerous at night: the use of vegetation by European wild rabbit." Canadian Journal of Zoology 74:1656-1660.
  7. ^ a b c Lombardi, L., N. Fernandez, et al. (2003). "Habitat-related Differences in Rabbit (Oryctolagus cuniculus) Abundance, Distribution, and Activity." Journal of Mammology 84(1):26-36.
  8. ^ Daly, J. C. (1981). "Effects of Social Organization and Environmental Diversity on Determining the Genetic Structure of a Population of the Wild Rabbit, Oryctolagus cuniculus." Evolution 35(4): 689-706.
  9. ^ a b c Dudzinski, M. L., R. Mykytowycz, et al. (1977). "Behavioral Characteristics of Adolescence in Young Captive European Rabbits, Oryctolagus cuniculus." Aggressive Behavior 3: 313-330.
  10. ^ a b Vastrade, F. M. (1987). "Spacing Behavior of Free-Ranging Domestic Rabbits, Oryctolagus cuniculus L." Applied Animal Behaviour Science 18:185-195.
  11. ^ Mykytowycz, R. and M. L. Dudzinski (1972). "Aggressive and Protective Behaviour of Adult Rabbits Oryctolagus Cuniculus (L.) Towards Rabbits." Behaviour 43: 97-120.
  12. ^ Sneddon, I. A. (1991). "Latrine Use by the European Rabbit (Oryctolagus cuniculus)." Journal of Mammology 72(4): 769-775.
  13. ^ a b Kunkele, J. a. V. H., D. (1996). "Natal dispersal in the European wild rabbit." Animal Behavior 51:1047-1059.
  14. ^ Gonzalez-Mariscal, G., M. E. Albonetti, et al. (1997). "Transitory inhibition of scent marking by copulation in male and female rabbits." Animal Behavior 53:323-333.
  15. ^ Rodel, H. G., A. Bora, et al. (2004). "Density-dependent reproduction in the European rabbit: a consequence of individual response and age-dependent reproductive performance." Oikos 104:529-539.
  16. ^ "The virus that stunned Australia’s rabbits". http://www.csiro.au/science/MyxomatosisHistory.html. Retrieved 2007-06-21. 
  17. ^ "Building a Rabbit "Bomb" in Australia". SCDWS Briefs 10 (4). January 1995. http://www.uga.edu/scwds/topic_index/1995/BUILDI~1.pdf. 
  18. ^ Hofmann,H: Wild Animals of Britain and Europe, HarperCollins 1995, pg.118-119 ISBN 0-00-762727-0
  19. ^ Mykytowycz, R. and M. L. Dudzinski (1972). "Aggressive and Protective Behaviour of Adult Rabbits Oryctolagus Cuniculus (L.) Towards Rabbits." Behaviour 43:97-120.
  20. ^ "History of Rabbit Domestication -- Western Europe". http://www.for-get-me-notrabbitry.com/1/post/2010/12/great-article-on-the-history-of-the-rabbit.html. 
  21. ^ "The Camel, the Hare and the Hyrax, chapter 6". http://www.zootorah.com/hyrax/hyrax.pdf. 
  22. ^ Kemppainen, Jouni K. (10 2007). "Kanit keskuudessamme (The rabbits among us)" (in Finnish). Suomen Kuvalehti: 76–83. 
  23. ^ Elspeth M. Veale, "The rabbit in England", Agricultural History Review, 5 .2 (1957).
  24. ^ SECEM 2006 red list available at http://www.secem.es/PDFs/Lista%20roja%20SECEM.pdf
  25. ^ IUCN 2008 red list available at http://www.iucnredlist.org/apps/redlist/details/41291/0/full
  • Reversing Rabbit Decline 2005 report concerning efforts to recover rabbits in Spain and Portugal, supported by the IUCN Lagomorph and Cat Specialist Groups

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