Rattus norvegicus var. albus
(Norway Rat)Conservation Status
Population Analysis
- For the 28,847 species in the Class Mammalia (Mammals), we average 14.56 observations each in our database; for the Norway Rat, we have 247 observations. Compared to other species in this Class, this species is moderately common.
- A two-sample t-test can be used to determine whether the trend in observations of the Norway Rat is the same as the trend in observations of Mammalia. Is this species just as common, as a proportion of all observations, as it once was? The answer is no, changes in observation rate of this species significantly differ from changes in observation rate of its Class. (t=7.285, p<0.001)
- How do observation rates of the Norway Rat differ from those of Mammalia? To answer this, we examined the percentage of observerations for Mammalia that were observations of the Norway Rat each year. We then correlated this percentage with observation year. If observations of the Norway Rat are becoming more common relative to other species of Mammalia, the correlation should be positive, but if it is becoming less common, the correlation should be negative. In fact, the correlation is negative (r=-.56), with a negative slope (m = -.004), suggesting that the Norway Rat may be in decline relative to other species of Mammalia. This correlation is statistically significant. (F = 82.14, p<.05)
- The scatter chart to the right shows the percentage of all observations for Mammalia each year that were observations of the Norway Rat.
Taxonomy
- Domain: Eukaryota
Whittaker & Margulis,1978 - eukaryotes
- Kingdom: Animalia
Linnaeus, 1758 - Linnaeus, 1758 - animals
- Subkingdom: Bilateria
(Hatschek, 1888) Cavalier-Smith, 1983 - (Hatschek, 1888) Cavalier-Smith, 1983 - bilaterians
- Branch: Deuterostomia
Grobben, 1908 - Deuterostomes
- Infrakingdom: Chordonia
(Haeckel, 1874) Cavalier-Smith, 1998
- Phylum: Chordata
Bateson, 1885 - Chordates
- Subphylum: Vertebrata
Cuvier, 1812 - Vertebrates
- Infraphylum: Gnathostomata
auct. - Jawed Vertebrates
- Superclass: Tetrapoda
Goodrich, 1930 - Tetrapods
- Class: Mammalia
Linnaeus, 1758 - Mammals
- Subclass: Theriiformes
(Rowe, 1988) McKenna & Bell, 1997:vii,36
- Infraclass: Holotheria
(Wible et al., 1995) McKenna & Bell, 1997:vii,43
- Superlegion: Trechnotheria
McKenna, 1975
- Legion: Cladotheria
McKenna, 1975
- Sublegion: Zatheria
McKenna, 1975
- Infralegion: Tribosphenida
(McKenna, 1975) McKenna & Bell, 1997:vii,48
- Supercohort: Theria
(Parker & Haswell, 1897) McKenna & Bell, 1997:viii,49 - Therians
- Cohort: Placentalia
(Owen, 1837) McKenna & Bell, 1997:viii,80 - Placentals
- Magnaorder: Epitheria
(McKenna, 1975) M.C. McKenna & S.K. Bell, 1997
- Superorder: Preptotheria
(McKenna, 1975) McKenna in Stucky & McKenna in Benton, ed., 1993:7
- Grandorder: Anagalida
(Szalay & McKenna, 1971) McKenna, 1975:41
- Mirorder: Simplicidentata
(Weber, 1904) McKenna & Bell, 1997:viii, 113
- Order: Rodentia Bowdich, 1821 - Rodents
- Mirorder: Simplicidentata
(Weber, 1904) McKenna & Bell, 1997:viii, 113
- Grandorder: Anagalida
(Szalay & McKenna, 1971) McKenna, 1975:41
- Superorder: Preptotheria
(McKenna, 1975) McKenna in Stucky & McKenna in Benton, ed., 1993:7
- Magnaorder: Epitheria
(McKenna, 1975) M.C. McKenna & S.K. Bell, 1997
- Cohort: Placentalia
(Owen, 1837) McKenna & Bell, 1997:viii,80 - Placentals
- Supercohort: Theria
(Parker & Haswell, 1897) McKenna & Bell, 1997:viii,49 - Therians
- Infralegion: Tribosphenida
(McKenna, 1975) McKenna & Bell, 1997:vii,48
- Sublegion: Zatheria
McKenna, 1975
- Legion: Cladotheria
McKenna, 1975
- Superlegion: Trechnotheria
McKenna, 1975
- Infraclass: Holotheria
(Wible et al., 1995) McKenna & Bell, 1997:vii,43
- Subclass: Theriiformes
(Rowe, 1988) McKenna & Bell, 1997:vii,36
- Class: Mammalia
Linnaeus, 1758 - Mammals
- Superclass: Tetrapoda
Goodrich, 1930 - Tetrapods
- Infraphylum: Gnathostomata
auct. - Jawed Vertebrates
- Subphylum: Vertebrata
Cuvier, 1812 - Vertebrates
- Phylum: Chordata
Bateson, 1885 - Chordates
- Infrakingdom: Chordonia
(Haeckel, 1874) Cavalier-Smith, 1998
- Branch: Deuterostomia
Grobben, 1908 - Deuterostomes
- Subkingdom: Bilateria
(Hatschek, 1888) Cavalier-Smith, 1983 - (Hatschek, 1888) Cavalier-Smith, 1983 - bilaterians
- Kingdom: Animalia
Linnaeus, 1758 - Linnaeus, 1758 - animals
Physical Description
Distribution
Similar Species
Members of the genus Rattus:
There are approximately 194 species and subspecies in this genus. Here are just 100 of them: R. adustus (Sunburned Rat) · R. annandalei (Annandale's Rat) · R. argentiventer (Rice-Field Rat) · R. argentiventer argentiventer · R. argentiventer bali · R. assimilis coracius · R. baluensis (Summit Rat) · R. blanfordi · R. bontanus (Bonthain Rat) · R. bowersi · R. burrescens · R. burrulus · R. burrus (Nonsense Rat) · R. canus · R. colletti (Dusky Rat) · R. coucha · R. coucha silaceus · R. coxinga · R. debruyni · R. doboensis · R. edwardsi · R. elaphinus (Sula Rat) · R. enganus (Enggano Rat) · R. everetti (Philippine Forest Rat) · R. exulans (Polynesian Rat) · R. exulans aitape · R. exulans browni · R. exulans concolor · R. exulans exulans · R. exulans hawaiiensis · R. exulans micronesiensis · R. exulans negrinus · R. exulans querceti · R. feliceus (Spiny Ceram Rat) · R. flavipectus · R. foramineus (Hole Rat) · R. fuscipes (Bush Rat) · R. fuscipes assimilis · R. fuscipes assimilus · R. fuscipes coracius · R. fuscipes fuscipes · R. fuscipes greyi · R. fuscipes greyii · R. giluwensis (Giluwe Rat) · R. hainaldi (Hainald's Rat) · R. hawaiiensis · R. hoffmanni (Hoffmann's Rat) · R. hoffmanni linduensis · R. hoogerwerfi (Hoogerwerf's Rat) · R. hoxaensis · R. jobiensis (Japen Rat) · R. koopmani (Koopman's Rat) · R. koratensis · R. korinchi (Korinch's Rat) · R. legata · R. leucopus (Cape York Rat) · R. leucopus cooktowensis · R. leucopus cooktownensis · R. leucopus leucopus · R. leucopus mordax · R. levipes · R. losea (Lesser Rice-Field Rat) · R. losea exiguus · R. losea losea · R. lugens (Mentawai Rat) · R. lutreolus (Australian Swamp Rat) · R. lutreolus cambricus · R. lutreolus lacus · R. lutreolus lutreolus · R. lutreolus velutinus · R. macleari (Christmas Island Rat) · R. marmosurus (Opossum Rat) · R. meltada · R. mindorensis (Mindoro Black Rat) · R. mollicomulus (Little Soft-Furred Rat) · R. montanus (Nillu Rat) · R. mordax (Eastern Rat) · R. morotaiensis (Molaccan Prehensile-Tailed Rat) · R. muelleri · R. murrayi · R. namaquensis · R. natalensis · R. nativitatis (Bulldog Rat) · R. niobe · R. nitidis · R. nitidus (Himalayan Field Rat) · R. norvegicus (Brown Rat) · R. norvegicus albinicus (Norway Rat) · R. norvegicus albino · R. norvegicus caraco · R. norvegicus domestica · R. norvegicus norvegicus (Norway Rat) · R. norvegicus norvegius · R. norvegicus socer · R. norvegicus socers · R. norvegicus var. albus (Norway Rat) · R. norvergicus · R. norvergicus albinus · R. norvergicus norvegicus · R. norvergicus norvergicus
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Notes
Contributors:
- Brands, S.J. (comp.) 1989-2006. Systema Naturae 2000. The Taxonomicon. Universal Taxonomic Services, Amsterdam, The Netherlands. Accessed October 4, 2006.
- Global Biodiversity Information Facility. Accessed June 18, 2006. http://www.gbif.org Mediated distribution data from 18 providers.
Identifiers:
- Zipcode Zoo Species Identifier: 630267
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