| 词条 | Cursor grass mouse |
| 释义 |
| status = LC | status_system = IUCN3.1 | status_ref = [1] | genus = Akodon | species = cursor | authority = Winge, 1888 }} The cursor grass mouse or cursorial akodont (Akodon cursor), is a sigmodontine rodent from South America.[2] DescriptionThe cursor grass mouse is a moderately sized rodent, with a head-body length of {{convert|11|to|13|cm}}, and a tail {{convert|8|to|11|cm}} long. Males are larger than females, weighing an average of {{convert|54|g}}, compared with {{convert|43|g|abbr=on}} for females. They have a typical mouse-like appearance, with short whiskers and stubby claws on the feet. They have dark to golden brown fur over most of their body, with paler greyish or yellowish underparts. Some have a whitish spot between the ears, but this is not present on all individuals.[3] Cursor grass mice are members of the A. cursor species group, and very similar in appearance to other members of the group. In particular, they cannot easily be distinguished from the closely related montane grass mouse, which inhabits neighbouring regions to the immediate south. Although the cursor grass mouse is, on average, slightly larger than the montane species, there is too much overlap for this to be a reliable guide. Instead, they can most readily be distinguished by the presence of a gall bladder in A. cursor (absent in the montane species), by karyotypic analysis, or by means of PCR based techniques.[3][4][5][6] Distribution and habitatThe exact geographic range of the cursor grass mouse is disputed. It is definitively known to inhabit eastern Brazil from Paraiba to Paraná, where it lives in patches of tropical Atlantic Forest and restinga scrubland at elevations from sea level to {{convert|1170|m}}. Some sources[1] also report it as being found further south, in extreme southern Brazil, in eastern Paraguay, and in northern Argentina.[7] These latter sources lack a definitive genetic analysis of the individuals identified, and it has been argued that they may represent members of other species, such as the montane grass mouse.[3] No subspecies are recognised. Biology and behaviourCursor grass mice are omnivorous. Their primary diet consists of small arthropods, especially Hymenoptera, beetles, and spiders; this is supplemented by seeds of Cecropia and other plants.[8] They search for food through leaf litter and patches of dense vegetation, and are strictly terrestrial.[9][10] Individuals have a home range of {{convert|0.1|to|0.7|ha|abbr=off}}, with the ranges of males being larger than those of females.[11] Although the size of their home ranges does not change, the population density of cursor grass mice becomes significantly higher during the rainy season, when insects are most abundant.[12] Cursor grass mice breed throughout the year, although most births occur during the dry season between June and September. Pregnant females construct globular nests, and give birth to a litter of two to nine young, with an average of four, after a gestation period of 23 days.[3][13] This species is particularly important for public health since it has been implied as a Hantavirus reservoir.[14] A cell line derived from a liposarcoma in a cursor grass mouse has been used by biomedical scientists in the construction of a panel for the identification of human chromosomes in hybrid cells.[15] References1. ^1 {{IUCN2008 |assessor=Christoff, A. |assessor2=Geise, L. |assessor3=Fagundes, V. |assessor4=Pardinas, U. |assessor5=D'Elia, G. |last-assessor-amp=yes |year=2008 |title=Akodon cursor |id=730 |downloaded=9 February 2009}} {{Taxonbar|from=Q306995}}2. ^{{MSW3 Muroidea | id = 13000551 | page = 1094}} 3. ^1 2 3 {{cite journal | author = Geise, L. | year = 2012 | title = Akodon cursor (Rodentia: Cricetidae) | journal = Mammalian Species | volume = 44 | issue = 1 | pages = 33–43 | doi = 10.1644/893.1}} 4. ^{{cite journal | author = Geise, L. | year = 2004 | title = Presence or absence of gall bladder in some Akodontini rodents (Muridae, Sigmodontinae) | journal = Mammalian Biology | volume = 69 | issue = 3 | pages = 210–214 | doi = 10.1078/1616-5047-00136|display-authors=etal}} 5. ^{{cite journal | author = Yazbeck, G.M. | year = 2011 | title = Detection of two morphologically cryptic species from the cursor complex (Akodon spp; Rodentia, Cricetidae) through the use of RAPD markers | journal = Genetics and Molecular Research | volume = 10 | issue = 4 | pages = 2881–2892 | doi = 10.4238/2011.November.22.2|display-authors=etal}} 6. ^{{cite journal |author1=Fagundes, V. |author2=Nogueira, C.D.A | year = 2007 | title = The use of PCR-RFLP as an identification tool for three closely related species of rodents of the genus Akodon (Sigmodontinae, Akodontini) | journal = Genetics and Molecular Biology | volume = 30 | issue = 3 | pages = 698–701 | doi = 10.1590/S1415-47572007000400031}} 7. ^{{cite journal | author = Pardiñas, U.F.J. | year = 2003 | title = The genus Akodon (Muroidea: Sigmodontinae) in Misiones, Argentina | journal = Mammalian Biology | volume = 68 | issue = 3 | pages = 129–143 | doi = 10.1078/1616-5047-00075|display-authors=etal}} 8. ^{{cite journal | author = Carvalho, F.M.V. | year = 1999 | title = Diet of small mammals in the Atlantic Forest fragments in southeastern Brazil | journal = Revista Brasileira de Zoociências | volume = 1 | issue = 1 | url=http://www.editoraufjf.com.br/revista/index.php/zoociencias/article/viewFile/309/311 | pages = 91–101|display-authors=etal}} 9. ^{{cite journal |author1=Gentile R. |author2=Fernandez, F.A.S. | year = 1999 | title = Influence of habitat structure on a streamside small mammal community in a Brazilian rural area | journal = Mammalia | volume = 63 | issue = 1 | pages = 29–40 | doi = 10.1515/mamm.1999.63.1.29}} 10. ^{{cite journal | author = Pardini, R. | year = 2004 | title = Effects of forest fragmentation on small mammals in an Atlantic Forest landscape | journal = Biodiversity and Conservation | volume = 13 | issue = 13 | pages = 2567–2586 | doi = 10.1023/B:BIOC.0000048452.18878.2d}} 11. ^{{cite journal | author = Gentile, R. | year = 1997 | title = Home range of Philander frenata and Akodon cursor in a Brazilian Restinga (coastal shrubland) | journal = Mastozoologia Neotropical | volume = 4 | issue = 2 | url = http://www.sarem.org.ar/mediawiki/images/7/7c/MN_4_2.pdf | pages = 105–112 | display-authors = etal }}{{dead link|date=August 2017 |bot=InternetArchiveBot |fix-attempted=yes }} 12. ^{{cite journal | author = Feliciano, B.R. | year = 2002 | title = Population dynamics of small rodents in a grassland among fragments of Atlantic Forest in southern Brazil | journal = Mammalian Biology | volume = 67 | issue = 5 | pages = 304–314 | doi = 10.1078/1616-5047-00045|display-authors=etal}} 13. ^{{cite journal | author = Aulchenko, Y.S. | year = 2002 | title = Inheritance of litter size at birth in the Brazilian grass mouse (Akodon cursor, Sigmodontinae, Rodentia) | journal = Genetics Research | volume = 80 | issue = 1 | pages = 55–62 | doi = 10.1017/S0016672302005839}} 14. ^{{cite journal | author = Lemos | year = 2004 | title = Evidence of hantavirus infection in wild rodents captured in a rural area of the state of São Paulo, Brazil | journal = Pesquisa Veterinária Brasileira | volume = 24 | issue = 2 | pages = 71–73| doi = 10.1590/S0100-736X2004000200004|display-authors=etal}} 15. ^{{cite journal | author = Bonvicino, C.R. | year = 2001 | title = Induction and characterization of hypoxanthine-phosphoribosyltransferase (Hprt−) deficient cell lines of Akodon cursor (Rodentia, Sigmodontinae) | journal = Cytogenetics and Cell Genetics | volume = 92 | issue = 1-2 | pages = 153–156 | doi = 10.1159/000056888|display-authors=etal}} 2 : Akodon|Mammals described in 1888 |
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