Sarcocystis peromysci n. sp. and S. idahoensis in deer mouse (Peromyscus maniculatus) in Montana

1983 ◽  
Vol 61 (5) ◽  
pp. 1180-1182 ◽  
Author(s):  
J. P. Dubey
Keyword(s):  
Peromyscus Maniculatus ◽  
Deer Mouse ◽  
Deer Mice ◽  
New Name ◽  
Thin Walled ◽  
Sarcocyst Wall

Two structurally distinct sarcocysts with thin and thick walls were found in 25 of 98 deer mice (Peromyscus maniculatus) in Montana. Thin-walled S. idahoensis sarcocysts were seen in 11 mice. Thick-walled sarcocysts were seen in 13 mice. A new name, S. peromysci, is proposed for the thick-walled sarcocysts. Sarcocystis peromysci sarcocysts were up to 1875 × 81 μm and contained 11.2 × 3.1 μm bradyzoites with prominent granules. The sarcocyst wall was 2–5.5 μm thick and had hairlike protrusions on its wall.

scholarly journals Development and Characterization of a Sin Nombre Virus Transmission Model in Peromyscus maniculatus

Viruses ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 183 ◽  
Author(s):  
Bryce Warner ◽  
Derek Stein ◽  
Bryan Griffin ◽  
Kevin Tierney ◽  
Anders Leung ◽  
...  
Keyword(s):  
Peromyscus Maniculatus ◽  
Deer Mouse ◽  
Virus Transmission ◽  
Transmission Model ◽  
Deer Mice ◽  
Sin Nombre Virus ◽  
Infection Model ◽  
Main Driver ◽  
Heat Shock Responses

In North America, Sin Nombre virus (SNV) is the main cause of hantavirus cardiopulmonary syndrome (HCPS), a severe respiratory disease with a fatality rate of 35–40%. SNV is a zoonotic pathogen carried by deer mice (Peromyscus maniculatus), and few studies have been performed examining its transmission in deer mouse populations. Studying SNV and other hantaviruses can be difficult due to the need to propagate the virus in vivo for subsequent experiments. We show that when compared with standard intramuscular infection, the intraperitoneal infection of deer mice can be as effective in producing SNV stocks with a high viral RNA copy number, and this method of infection provides a more reproducible infection model. Furthermore, the age and sex of the infected deer mice have little effect on viral replication and shedding. We also describe a reliable model of direct experimental SNV transmission. We examined the transmission of SNV between deer mice and found that direct contact between deer mice is the main driver of SNV transmission rather than exposure to contaminated excreta/secreta, which is thought to be the main driver of transmission of the virus to humans. Furthermore, increases in heat shock responses or testosterone levels in SNV-infected deer mice do not increase the replication, shedding, or rate of transmission. Here, we have demonstrated a model for the transmission of SNV between deer mice, the natural rodent reservoir for the virus. The use of this model will have important implications for further examining SNV transmission and in developing strategies for the prevention of SNV infection in deer mouse populations.

The ecology of the deer mouse, Peromyscus maniculatus, in a coastal coniferous forest. III. Stomach-weight variation

1974 ◽  
Vol 52 (11) ◽  
pp. 1311-1315 ◽  
Author(s):  
J. Harling ◽  
R. M. F. S. Sadleir
Keyword(s):  
Frequency Distribution ◽  
Seasonal Changes ◽  
Peromyscus Maniculatus ◽  
Deer Mouse ◽  
Coniferous Forest ◽  
Deer Mice ◽  
Full Stomach ◽  
Weight Variation ◽  
Consumption Rates ◽  
Stomach Weight

The frequency distribution of over 600 stomach weights of deer mice showed considerable variation and was highly skewed. Because of the difficulty of defining a "full" stomach, it was not possible to use the weights of stomachs sampled to estimate consumption rates. There were no significant seasonal changes in mean stomach weights over a 3-year study and no relationship between stomach weights and sexual condition was found.

Sodium pentobarbital induced alterations in regional distribution of blood in Peromyscus maniculatus (deer mouse) and Eptesicus fuscus (big brown bat)

1977 ◽  
Vol 55 (12) ◽  
pp. 1931-1935 ◽  
Author(s):  
Josefine C. Rauch ◽  
David D. Beatty
Keyword(s):  
Skeletal Muscle ◽  
Peromyscus Maniculatus ◽  
Deer Mouse ◽  
General Pattern ◽  
Regional Distribution ◽  
Deer Mice ◽  
Sodium Pentobarbital ◽  
Blood Distribution ◽  
Big Brown Bat ◽  
Pentobarbital Anaesthesia

This study demonstrates the effect of sodium pentobarbital anaesthesia on heart rate (HR) and blood distribution (Sapirstein method) in the deer mouse, Peromyscus maniculatus, and in the big brown bat, Eptesicus fuscus.Resting HR's average 400 beats/min and 334 beats/min in deer mice and bats, respectively. Administration of 40 mg/kg sodium pentobarbital results in marked tachycardia in deer mice but not in bats. A dose of 60 mg/kg causes a slight increase of HR above resting values in the mice and a significant decrease in the bats. The comparatively low HR's in bats are considered to be due to their lowering of body temperature to near environmental levels.The general pattern of blood distribution is comparable between the two species investigated. Sodium pentobarbital administration results in a pronounced redistribution of blood which includes an increase in the fractional delivery of cardiac output to viscera of the abdomen primarily at the expense of skeletal muscle.

Population Dynamics of Deer Mice, Peromyscus maniculatus, and Yellow-pine Chipmunks, Tamias amoenus, in Old Field and Orchard Habitats

2004 ◽  
Vol 118 (3) ◽  
pp. 299 ◽  
Author(s):  
Thomas P. Sullivan ◽  
Druscilla S. Sullivan ◽  
Eugene J. Hogue
Keyword(s):  
Population Dynamics ◽  
Peromyscus Maniculatus ◽  
Deer Mouse ◽  
Detailed Comparison ◽  
Rodent Species ◽  
Deer Mice ◽  
Old Field ◽  
Tamias Amoenus ◽  
Yellow Pine ◽  
Mammal Communities

There are often several rodent species included in the small mammal communities in orchard agro-ecosystems. This study was designed to test the hypothesis that the population levels of Deer Mice (Peromyscus maniculatus) and Yellow-pine Chipmunks (Tamias amoenus) would be enhanced in old field compared with orchard habitats. Rodent populations were intensively livetrapped in replicate old field and orchard sites over a four-year period at Summerland, British Columbia, Canada. Deer Mouse populations were, on average, significantly higher (2.5 – 3.4 times) in the old field than orchard sites in summer and winter periods. Mean numbers/ha of Deer Mice ranged from 12.1 to 60.4 in old field sites and from 3.3 to 19.9 in orchard sites. Breeding seasons in orchards were significantly longer than those in old field sites, in terms of proportion of reproductive male Deer Mice. Recruitment of new animals and early juvenile survival of Deer Mice were similar in orchard and old field sites. Populations of Yellow-pine Chipmunks ranged in mean abundance/ha from 5.6 – 19.0 in old field sites and from 1.9 – 17.5 on one orchard site, with no difference in mean abundance in 2 of 4 years of the study. Recruitment and mean survival of Yellow-pine Chipmunks also followed this pattern. This study is the first detailed comparison of the population dynamics of these rodent species in old field and orchard habitats. These species should be able to maintain their population levels and help contribute to a diversity of small mammals in this agrarian landscape.

Effects of isolation on red-backed voles (Clethrionomys gapperi) and deer mice (Peromyscus maniculatus) in a sage–steppe matrix

2001 ◽  
Vol 79 (9) ◽  
pp. 1597-1603
Author(s):  
W Christopher Witt ◽  
Nancy Huntly
Keyword(s):  
Peromyscus Maniculatus ◽  
Deer Mouse ◽  
Ground Cover ◽  
Habitat Characteristics ◽  
Deer Mice ◽  
Habitat Isolation ◽  
Clethrionomys Gapperi ◽  
Habitat Specialist ◽  
Forest Patches ◽  
Naturally Occurring

Effects of habitat isolation can differ among species, thereby influencing populations both directly and indirectly. We used naturally occurring forest patches surrounded by a sage–steppe matrix in southeast Idaho to test the hypothesis that a habitat specialist, the red-backed vole (Clethrionomys gapperi), would have movements restricted and therefore population densities reduced on forest patches isolated by distances equal to or greater than their typical home-range diameter. We hypothesized that the more generalized deer mouse (Peromyscus maniculatus) would not show effects of isolation at this scale. We tested for effects of isolation on these small mammals in 1999 and 2000 in forest patches that varied in distance to a mainland forest. Densities of red-backed voles decreased with isolation and those of deer mice did not. However, strong relationships were also found between red-backed vole densities and habitat characteristics, which themselves varied with isolation. Livestock apparently had disproportionate effects on the more isolated patches, thereby altering ground cover. Isolation by distances up to 450 m appears to reduce (filter) rather than eliminate immigration of red-backed voles; however, effects of livestock on isolated habitat patches may prevent successful dispersers from populating patches.

scholarly journals Phylogeography of the deer mouse (Peromyscus maniculatus) provides a predictive framework for research on hantaviruses

2006 ◽  
Vol 87 (7) ◽  
pp. 1997-2003 ◽  
Author(s):  
Jerry W. Dragoo ◽  
J. Alden Lackey ◽  
Kathryn E. Moore ◽  
Enrique P. Lessa ◽  
Joseph A. Cook ◽  
...  
Keyword(s):  
Disease Transmission ◽  
Peromyscus Maniculatus ◽  
Deer Mouse ◽  
Deer Mice ◽  
Sin Nombre Virus ◽  
Rodent Host ◽  
Bayesian Analyses ◽  
Future Studies ◽  
Geographical Regions ◽  
Virus Strains

Phylogeographical partitioning of Sin Nombre and Monongahela viruses (hantaviruses) may reflect that of their primary rodent host, the deer mouse (Peromyscus maniculatus). Lack of a comprehensive assessment of phylogeographical variation of the host has precluded the possibility of predicting spatial limits of existing strains of these viruses or geographical regions where novel viral strains might emerge. The complete cytochrome b gene was sequenced for 206 deer mice collected from sites throughout North America to provide a foundation for future studies of spatial structure and evolution of this ubiquitous host. Bayesian analyses of these sequences partitioned deer mice into six largely allopatric lineages, some of which may represent unrecognized species. The geographical distributions of these lineages were probably shaped by Quaternary climatic events. Populations of mice were apparently restricted to refugia during glacial advances, where they experienced genetic divergence. Expansion of these populations, following climatic amelioration, brought genetically distinctive forms into contact. Occurrence of parallel changes in virus strains can now be explored in appropriate regions. In New Mexico, for example, near the location where Sin Nombre virus was first discovered, there are three genetically distinctive lineages of deer mice whose geographical ranges need to be delineated precisely. The phylogeography of P. maniculatus provides a framework for interpreting geographical variability, not only in hosts, but also in associated viral variants and disease transmission, and an opportunity to predict the potential geographical distribution of newly emerging viral strains.

CHROMOSOME POLYMORPHISM IN INTERBRED SUBSPECIES OF PEROMYSCUS MANICULATUS (DEER MOUSE)

1971 ◽  
Vol 13 (2) ◽  
pp. 277-282 ◽  
Author(s):  
Robert S. Sparkes ◽  
David T. Arakaki
Keyword(s):  
North America ◽  
Peromyscus Maniculatus ◽  
Deer Mouse ◽  
Chromosomal Polymorphism ◽  
Deer Mice ◽  
Chromosome Polymorphism ◽  
Widespread Distribution ◽  
Pericentric Inversions ◽  
Karyotype Analyses

Karyotype analyses of eight animals from an interbreeding colony of three subspecies of Peromyscus maniculatus (P.m. gambelli, P.m. rubidus, and P.m. sonoriensis) demonstrated a chromosomal polymorphism, probably due to pericentric inversions involving at least seven chromosomes. This polymorphism may require consideration in the cytogenetic taxonomy of these animals, and may be related to the widespread distribution of deer mice in North America and their apparent adaptability to many different environments.

The short-term impact of abundant fruit upon deer mouse (Peromyscus maniculatus), southern red-backed vole (Myodes gapperi), and woodland jumping mouse (Napaeozapus insignis) populations

2016 ◽  
Vol 94 (8) ◽  
pp. 555-563 ◽  
Author(s):  
Evan C. Dracup ◽  
Daniel M. Keppie ◽  
Graham J. Forbes
Keyword(s):  
Picea Glauca ◽  
Temperate Forest ◽  
Peromyscus Maniculatus ◽  
Adult Population ◽  
Deer Mouse ◽  
Home Range Size ◽  
Deer Mice ◽  
Short Term ◽  
Napaeozapus Insignis ◽  
Rodent Populations

Fruit has been identified as an important and potentially population-restricting food for southern red-backed voles (Myodes gapperi (Vigors, 1830)), deer mice (Peromyscus maniculatus (Wagner, 1845)), and woodland jumping mice (Napaeozapus insignis (Miller, 1891)). We added domestic dried strawberries (Fragaria × ananassa (Weston) Duchesne ex Rozier (pro sp.)) and European black currants (Ribes nigrum L.), which have native analogues and are preferred foods of these rodents, to white spruce (Picea glauca (Moench) Voss) plantations from May through August 2011 and 2012 to test fruit and fruit-based carbohydrate’s short-term (1–2 years) impact on these rodent populations. We used mark–recapture to estimate density, percentages of population that were juvenile and breeding female, mean home-range size, and body mass during spring and summer of both years, and fecundity via placental scars from euthanized females in summer 2012. Fruit enhancement had no apparent effect on our species’ fecundity, proportion of breeding females or juveniles during spring and summer of either year, nor were there differences among these metrics in spring 2012 following 2011 fruit additions. Overall, there were no impacts to the short-term adult population dynamics for any species during fruit addition. We are led to believe that short-term pulses of fruit and (or) fruit-based carbohydrate abundance do little to influence temperate forest small-mammal populations.

Deer mouse trappability in relation to bait preference

1980 ◽  
Vol 58 (12) ◽  
pp. 2282-2284 ◽  
Author(s):  
Druscilla S. Sullivan ◽  
Thomas P. Sullivan
Keyword(s):  
Water Content ◽  
Small Mammals ◽  
Peromyscus Maniculatus ◽  
Deer Mouse ◽  
Peanut Butter ◽  
Deer Mice

When given the choice between traps with or without a mixture of peanut butter and oats (peanut butter balls), deer mice (Peromyscus maniculatus) preferred the former. However, trappability of deer mice was not affected by the presence of peanut butter balls. Acceptable food in live traps is essential to successful trapping of small mammals as these animals will systematically return to traps for food. The peanut butter and oatmeal mixture would increase the nutritional and possibly water content of food in the trap and is thus recommended for deer mouse trapping.

Diel locomotory activity of deer mice (Peromyscus maniculatus) infected with Trichinella nativa or Trichinella pseudospiralis

1995 ◽  
Vol 73 (7) ◽  
pp. 1323-1334 ◽  
Author(s):  
Sylvain R. Poirier ◽  
Manfred E. Rau ◽  
Xiaohui Wang
Keyword(s):  
Peromyscus Maniculatus ◽  
Deer Mouse ◽  
Deer Mice ◽  
Locomotory Activity ◽  
Rodent Host ◽  
Activity Data ◽  
Trichinella Pseudospiralis ◽  
Familiar Environment ◽  
Induced Changes ◽  
Trichinella Nativa

The effects of infection by two species of sylvatic Trichinella on the diel locomotory activity of a wild rodent host, the deer mouse Peromyscus maniculatus, in a familiar environment were investigated in the laboratory using computer-linked activity chambers equipped with an infrared photocell. Locomotory activity data were collected on each mouse prior to and after sham inoculation or inoculation with graded doses of muscle-encapsulating Trichinella nativa or nonencapsulating Trichinella pseudospiralis larvae. Trichinella nativa infections induced activity deficits in deer mice that were proportional to the number of infective larvae recovered, whereas derived indices of locomotory activity of mice infected with T. pseudospiralis remained essentially within the range of those of sham-inoculated control mice. Quantitative differences between T. nativa and T. pseudospiralis in their potential to modulate the host's immune response may account for the observed difference in their effect on locomotory activity of the deer mouse host. Such variation in trichina-induced changes in diel locomotory activity may serve to channel transmission of the parasites to suitable hosts.

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