Biochemical Relationships of the Mouse Peromyscus in New England

Waters, Joseph H.

doi:10.2307/2411532

Cited by 12 publications

(6 citation statements)

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“…It is conceivable that Ixodes ticks may have had a much wider distribution range when its main reproductive host, the deer, was more widespread (36). For some rodent hosts, phylogeographic patterns similar to that seen here for B. burgdorferi have been shown, i.e., Northeastern, Midwestern, and Western populations, with the Midwest and Californian clades being linked geographically (and via interbreeding at hybridization zones) by Rocky Mountain-Great Plains clades (15,51). Such a pattern is consistent with the phylogeographies of Hanta virus and its deer mouse reservoirs (15).…”

Section: Tablesupporting

confidence: 85%

Two Boundaries Separate Borrelia burgdorferi Populations in North America

Margos

Tsao

Castillo-Ramírez

et al. 2012

Appl Environ Microbiol

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g Understanding the spread of infectious diseases is crucial for implementing effective control measures. For this, it is important to obtain information on the contemporary population structure of a disease agent and to infer the evolutionary processes that may have shaped it. Here, we investigate on a continental scale the population structure of Borrelia burgdorferi, the causative agent of Lyme borreliosis (LB), a tick-borne disease, in North America. We test the hypothesis that the observed population structure is congruent with recent population expansions and that these were preceded by bottlenecks mostly

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Section: Tablesupporting

confidence: 85%

Two Boundaries Separate Borrelia burgdorferi Populations in North America

Margos

Tsao

Castillo-Ramírez

et al. 2012

Appl Environ Microbiol

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“…The range of the lizards that serve as the main host for the more southern ticks generally extends northward along the Atlantic coast only to that latitude. The host associations of deer ticks suggest that their ranges may correspond to the post-Wisconsin relict distributions of their vertebrate hosts (32).…”

Section: Resultsmentioning

confidence: 99%

Distribution of the Ixodes ricinus-like ticks of eastern North America.

Rich

Caporale

Telford

et al. 1995

Proc. Natl. Acad. Sci. U.S.A.

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We analyzed the geographic distribution of the Ixodes ricinus-like ticks in eastern North America by comparing the mitochondrial 16S rDNA sequences of specimens sampled directly from the field during the 1990s. Two distinct lineages are evident. The southern clade includes ticks from the southeastern and middle-eastern regions of the United States. The range of the northern clade, which appears to have been restricted to the northeastern region until the mid-1900s, now extends throughout the northeastern and middle-eastern regions. These phyletic units correspond to northern and southern taxa that have previously been assigned specific status as Ixodes dammini and Ixodes scapularis, respectively. The expanding range of I. dammini appears to drive the present outbreaks of zoonotic disease in eastern North America that include Lyme disease and human babesiosis.

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“…If our assumption that extent of lipid deposition reflects degree of adaptation to winter climates is correct, then P. maniculatus is better adapted than R. megalotis to the plains environment at the latitude of Kansas. There is good reason to believe that P. maniculatus evolved in sub boreal habitats of North America, and subsequently became established farther to the south or west on the Great Plains (see, for example, Waters, 1963), whereas the western harvest mouse almost certainly dispersed northward to the Great Plains from a center of dispersal in southern Mexico (Hooper, 1952). Therefore, R. megalotis probably has not been exposed to the selective pressures of a temperate continental climate for as long as P. maniculatus, and must resort to increased secondary production in the form of lipid deposition as a means of adaptation to adverse winter conditions.…”

Section: Discussionmentioning

confidence: 99%

Body Composition, Energy Content, and Lipid Cycles of Four Species of Rodents

Fleharty¹,

Krause²,

Stinnett³

1973

Journal of Mammalogy

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GroSS body composition, energy content, and lipid cycles of Peromyscus maniculatus, Reithrodontomys megalotis, Sigmodon hispidus, and Microtus ochrogaster were studied. Ash values for adults ranged from 14.2 to 16.1 per cent of dry body weight, and water content varied from 61.5 to 74.2 per cent. Lipid content ranged from a low of 14.6 per cent dry body weight in M. ochrogaster to a high of 25.6 per cent in S. hispidus. Annually, kilocalories per gram live weight averaged 1.61 in P. maniculatus, 1.65 in R. megalotis, 1.74 in S. hispidus, and 1.42 in M. ochrogaster. Energy content of subadults and adults of S. hispidus differed significantly during summer, autumn, and winter; no such differences were noted for age categories of the other species. The four species exhibited three different types of lipid cycles: in both P. maniculatus and R. megalotis, lipid content was lowest in summer and highest in winter; in S. hispidus, the lowest readings were in spring and the highest in winter; in M. ochrogaster, lipid content fluctuated on a monthly basis but exhibited no annual cycle. We postulate that annual lipid cycles reflect the zoogeographic history of the species, and might thus serve as a measure of physiological adaptation to climatic conditions unlike those that existed at the respective times and places of evolution of the four species.The current interest in energy flow through ecosystems has brought about a need for comprehensive data on body composition and lipid cycles in animals. Body composition of certain small mammals has been studied by Pitts ( 1960), Hayward (1965), and Gorecki (1965. Lipid cycles of certain rodents have been described by Connell (1959), Jameson andMead (1964), andSawicka-Kapusta (1968). A few other studies have dealt with various aspects of lipid deposition in rodents (for example, Hsia-Wu-ping and Sun-Chung-lu, 1963;Gaertner, 1968; and Golley, 1969), but few data are available as yet for even the commonest species of small native mammals.Our purposes in this study were: 1) to determine gross body composition in four species of rodents with overlapping geographic ranges on the Great Plains-namely, the deer mouse (Peromyscus maniculatus), the western harvest mouse (Reithrodontomys megalotis) , the hispid cotton rat (Sigmodon hispidus), and the prairie vole (Microtus ochrogaster); 2) to elucidate their intraspecific and interspecific variation in body composition; and 3) to delineate their lipid cycles. MATERIALS AND METHODSSamples studied included 122 specimens of P. maniculatus, 124 of R. megalotis, 132 of S. hispidus, and 109 of M. ochrogaster. Individuals of the four species were collected in Ellis County, Kansas, in each month during the period October 1969 to September 1970. As soon as possible after they were trapped, rodents were sexed, weighed, and frozen. Just prior to study, each specimen was reweighed; any decrease in weight while frozen was 426

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Biochemical Relationships of the Mouse Peromyscus in New England

Cited by 12 publications

References 0 publications

Two Boundaries Separate Borrelia burgdorferi Populations in North America

Two Boundaries Separate Borrelia burgdorferi Populations in North America

Distribution of the Ixodes ricinus-like ticks of eastern North America.

Body Composition, Energy Content, and Lipid Cycles of Four Species of Rodents

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