Orkney vole | |
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Orkney vole (Microtus arvalis orcadensis) in the Natural History Museum at Tring | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Mammalia |
Order: | Rodentia |
Family: | Cricetidae |
Subfamily: | Arvicolinae |
Genus: | Microtus |
Species: | |
Subspecies: | M. a. orcadensis |
Trinomial name | |
Microtus arvalis orcadensis Millais, 1904 | |
Synonyms | |
Microtus orcadensis Contents |
The Orkney vole (Microtus arvalis orcadensis) is a population of the common vole (Microtus arvalis) found in the Orkney Islands, off the northern coast of Scotland, as well as in the Channel Island of Guernsey. [3] Orkney voles are about 10% larger than voles from other populations of the common vole. [3] The common vole is absent from the rest of the British Isles.
The Orkney vole occurs on eight islands of the group, Mainland, Sanday, Westray, Rousay, South Ronaldsay, Burray, Eday and Stronsay. [4]
In the past the populations on each of these islands have been named as subspecies, and the Orkney vole as a whole is considered by some taxonomists to be a subspecies of the common vole because of its size difference from the common vole. However, others do not recognise any subspecies of the common vole, [2] especially since DNA analysis indicates transport by Neolithic humans from what is now Belgium. [5] Chromosome studies have shown however, that despite being twice as heavy as continental voles, they are conspecific and should be regarded as a subspecies. [4]
Microtus arvalis does not occur in mainland Britain, nor elsewhere in the British Isles. It was hypothesised that the Orkney voles were a relict population, left behind when the land-bridge connecting Scotland and Orkney had disappeared, by the date that the more competitive Microtus agrestis had reached Northern Scotland. This theory has now been rejected on palaeontological, ecological, biological and geological grounds.
It is now accepted that they were introduced to the Orkney archipelago by humans in Neolithic times, possibly concealed in animal fodder. The oldest known radiocarbon-dated fossil of the species in Orkney is 4,600 years old: this marks the latest possible date of introduction. [4]
Orkney, also known as the Orkney Islands or The Orkneys, is an archipelago in the Northern Isles of Scotland, situated off the north coast of the island of Great Britain. Orkney is 10 miles (16 km) north of the coast of Caithness and has about 70 islands, of which 20 are inhabited. The largest island, the Mainland, has an area of 523 square kilometres (202 sq mi), making it the sixth-largest Scottish island and the tenth-largest island in the British Isles. Orkney's largest settlement, and also its administrative centre, is Kirkwall.
Hoy is an island in Orkney, Scotland, measuring 143 square kilometres (55 sq mi) – the second largest in the archipelago, after Mainland. A natural causeway, the Ayre, links the island to the smaller South Walls; the two islands are treated as one entity by the UK census. Hoy lies within the parish of Stromness.
The Mainland, also known as Hrossey and Pomona, is the main island of Orkney, Scotland. Both of Orkney's burghs, Kirkwall and Stromness, lie on the island, which is also the heart of Orkney's ferry and air connections.
Westray is one of the Orkney Islands in Scotland, with a usual resident population of just under 600 people. Its main village is Pierowall, with a heritage centre, the 15th-century Lady Kirk church and pedestrian ferry service to nearby Papa Westray island. Westray has a number of archeological sites dating from 3500 BC, and remains of several Norse-Viking settlements. The spectacular sea cliffs around Noup Head are home to thousands of seabirds.
South Ronaldsay is one of the Orkney Islands off the north coast of Scotland. It is linked to the Orkney Mainland by the Churchill Barriers, running via Burray, Glimps Holm and Lamb Holm.
Shapinsay is one of the Orkney Islands off the north coast of mainland Scotland. There is one village on the island, Balfour, from which roll-on/roll-off car ferries sail to Kirkwall on the Orkney Mainland. Balfour Castle, built in the Scottish Baronial style, is one of the island's most prominent features, a reminder of the Balfour family's domination of Shapinsay during the 18th and 19th centuries; the Balfours transformed life on the island by introducing new agricultural techniques. Other landmarks include a standing stone, an Iron Age broch, a souterrain and a salt-water shower.
The eastern meadow vole, sometimes called the field mouse or meadow mouse, is a North American vole found in eastern Canada and the United States. Its range extends farther south along the Atlantic coast.
Microtus is a genus of voles found in North America, Europe and northern Asia. The genus name refers to the small ears of these animals. They are stout rodents with short ears, legs and tails. They eat green vegetation such as grasses and sedges in summer, and grains, seeds, root and bark at other times. The genus is also called "meadow voles".
The common vole is a European rodent.
The fauna of Scotland is generally typical of the northwest European part of the Palearctic realm, although several of the country's larger mammals were hunted to extinction in historic times and human activity has also led to various species of wildlife being introduced. Scotland's diverse temperate environments support 62 species of wild mammals, including a population of wild cats, important numbers of grey and harbour seals and the most northerly colony of bottlenose dolphins in the world.
The beach vole or Muskeget vole is a rodent in the family Cricetidae. This close relative of the eastern meadow vole is endemic to the 0.87km² Muskeget Island, Massachusetts. Due to its relatively short period of reproductive isolation, there is debate over the beach vole’s designation as a subspecies of M. pennsylvanicus.
Prehistoric Orkney refers only to the prehistory of the Orkney archipelago of Scotland that begins with human occupation. Although some records referring to Orkney survive that were written during the Roman invasions of Scotland, “prehistory” in northern Scotland is defined as lasting until the start of Scotland's Early Historic Period.
The fauna of England is similar to that of other areas British Isles and lies within the Palearctic realm. England's fauna is mainly made up of small animals and is notable for having few large mammals, but in similarity with other island nations; many bird species.
Prehistoric Shetland refers to the prehistoric period of the Shetland archipelago of Scotland, when it was first occupied by humans. The period prior to human settlement in Shetland is known as the geology of Scotland. Prehistory in Shetland does not end until the beginning of the Early Medieval Period in Scotland, around AD 600. More than 5,000 archaeological sites have been recorded in the Shetland Islands.
Igor Zagorodniuk is a Ukrainian zoologist, mammalogist, ecologist, and founder of Theriological school. He is a laureate of the State Prize of Ukraine in the field of science and technology (2015), and the author of more than 500 scientific publications.
Caroline Rosa Wickham-Jones FSA was a British archaeologist specialising in Stone Age Orkney. She was a lecturer at the University of Aberdeen until her retirement in 2015.
The western meadow vole is a species of North American vole found in midwestern and western Canada and the United States, and formerly in Mexico. It was formerly considered conspecific with the eastern meadow vole, but genetic studies indicate that it is a distinct species.
The 2007 vole plague began to develop at the beginning of the summer of 2006 in the Spanish autonomous community of Castile and León, more specifically in the province of Palencia. The plague became relevant from the summer of 2007 onwards when crops in the plateau fields were devastated by these rodents, which put special emphasis on irrigated crops. In September 2007, after a summer of severe losses, the density of rodents decreased throughout the community and the plague was institutionally considered to be over. However, there was an abundance of voles during the following months, being only the winter frosts and the low temperatures of November and December which helped to put an end to the situation.