Shrew Soft Deployment
Kingdom:Phylum:Class:Order:Family:, 1814.The shrew ( Soricidae) is a small -like classified in the. True shrews are not to be confused with, or the, which belong to different families or orders.Although its external appearance is generally that of a long-nosed mouse, a shrew is not a, as mice are.
It is, in fact, a much closer relative of and moles, and shrews are related to rodents only to the extent that both belong to the – together with, and others. Shrews have sharp, spike-like teeth, not the familiar gnawing front incisor teeth of rodents.Shrews are; of the major tropical and temperate land masses, only, and have no native shrews; in shrews appeared only relatively recently, as a result of the, and are present only in the northern. In terms of species diversity, the shrew family is the fourth-most successful mammal family, being exceeded only by the families and and the family.
Water shrew skeletonIn general, shrews are terrestrial creatures that forage for seeds, insects, nuts, worms, and a variety of other foods in leaf litter and dense vegetation, but some specialise in climbing trees, living underground, living, or even hunting in water. They have small eyes and generally poor, but have excellent senses of. They are very active animals, with voracious appetites. Shrews have unusually high, above that expected in comparable small mammals. Shrews in captivity can eat 1/2 to 2 times their own body weight in food daily.They do not, but are capable of entering. In winter, many species undergo changes that drastically reduce their body weight. Shrews can lose between 30% and 50% of their body weight, shrinking the size of bones, skull, and internal organs.Whereas rodents have gnawing that grow throughout life, the teeth of shrews wear down throughout life, a problem made more extreme because they lose their before birth, so have only one set of teeth throughout their lifetimes.
In some species, exposed areas of the teeth are dark red due to the presence of iron in the tooth enamel. The iron reinforce the surfaces that are exposed to the most stress, which helps prolong the life of the teeth. This adaptation is not found in species with lower metablism, which don't have to eat as much and therefore don't wear down the enamel to the same degree. The only other mammals with pigmented enamel are the incisors of rodents. Apart from the first pair of incisors, which are long and sharp, and the chewing at the back of the mouth, the teeth of shrews are small and peg-like, and may be reduced in number.
The of shrews is: 3.1.1-3.3 1-2.0-1.1.3Shrews are fiercely territorial, driving off rivals, and coming together only to mate. Many species dig for catching food and hiding from, although this is not universal.Female shrews can have up to 10 litters a year; in the tropics, they breed all year round; in temperate zones, they cease breeding only in the winter. Shrews have periods of 17–32 days. The female often becomes pregnant within a day or so of giving birth, and during her pregnancy, one litter as the next is born. Shrews live 12 to 30 months.Shrews are unusual among mammals in a number of respects. Unlike most mammals, some species of shrews are.
Shrew venom is not conducted into the wound by, but by grooves in the teeth. The venom contains various compounds, and the contents of the venom glands of the are sufficient to kill 200 mice by intravenous injection.
Shrew Soft Windows 10
One chemical extracted from shrew venom may be potentially useful in the treatment of high blood pressure, while another compound may be useful in the treatment of some. The saliva of the ( Blarina brevicauda) contains, a which has been studied for use in treating. Also, along with the and, some species of shrews use. Unlike most other mammals, shrews lack (also called the ), so have incomplete.Echolocation. The is known to.The only terrestrial mammals known to are two genera ( and ) of shrews, the of, and the. These include the ( Sorex araneus) and the American ( Sorex vagrans) and ( Blarina brevicauda).
These shrews emit series of ultrasonic squeaks. By nature the shrew sounds, unlike those of bats, are low-amplitude, broadband, multiharmonic, and frequency modulated. They contain no 'echolocation clicks' with and would seem to be used for simple, close-range spatial orientation. In contrast to bats, shrews use echolocation only to investigate their habitats rather than additionally to pinpoint food.Except for large and thus strongly reflecting objects, such as a big stone or tree trunk, they probably are not able to disentangle echo scenes, but rather derive information on habitat type from the overall call reverberations. This might be comparable to human hearing whether one calls into a beech forest or into a reverberant wine cellar.
Classification The 385 shrew species are placed in 26 genera, which are grouped into three living subfamilies: Crocidurinae , (African shrews), and Soricinae. In addition, the family contains the extinct subfamilies, and (although Heterosoricinae is also commonly considered a separate family). Family Soricidae. Subfamily.
Subfamily. Subfamily. Tribe. Tribe. Tribe.
Tribe. †. Tribe. Tribe.References. Hutterer R (2005)., Reeder D (eds.). Johns Hopkins University Press.
Pp. 223–300. Louch CD, Ghosh AK, Pal BC (1966).
'Seasonal Changes in Weight and Reproductive Activity of Suncus murinus in West Bengal, India'. Journal of Mammalogy. 47 (1): 73–78.
Shrew Soft Deployment Schedule
^ Barnard CJ (1984). Macdonald DW (ed.). New York: Facts on File. Pp. 758–763. William J, Platt WJ (1974). 'Metabolic Rates of Short-Tailed Shrews'.
Physiological Zoology. 47 (2): 75–90. Reid F (2009). Pp. 63–64. Churchfield S (January 1990). Wible J. Carnegie Museum.
Macdonald DW, ed. The Encyclopedia of Mammals. Oxford University Press. (2007). Retrieved 23 May 2010. Tomasi TE (1979).
'Echolocation by the Short-Tailed Shrew Blarina brevicauda'. Journal of Mammalogy. 60 (4): 751–9. ^ Siemers BM, Schauermann G, Turni H, von Merten S (October 2009). Biology Letters.
5 (5): 593–6. Wilson DE, Reeder DM (2011). 3148: 56–60.Further reading.
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