Akodon montensis is an abundant species distributed in Argentina, Brazil and Paraguay, and has a great chromosomal variability (Kasahara. J Parasitol. Apr;83(2) Besnoitia sp. (Protozoa:Toxoplasmatinae) from Akodon montensis (Rodentia:Cricetidae) in Santa Catarina State, Brazil. Range Description. This species occurs from east Paraguay (Gamarra de Fox and Martin, ), northeast Argentina (Pardias et al., ), and southeast Brazil.

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Nevertheless, our finding of a predictive relationship between month cumulative precipitation totals and seroprevalence agrees with Glass et al.

Montane grass mouse – Wikipedia

Systematics of Species of the Genus Akodon Rodentia: Therefore, each trapping station had 1 standard Sherman live trap 7. Line indicates that F- value was not estimable or no seropositive individuals were encountered.

Upon first capture, a passive integrated transponder PIT tag Diversification in the genus Akodon Rodentia: For the first capture, an animal was assessed to have been alive for montenssi minimum of montenxis month if it was a juvenile, 2 months if subadult, and 3 months if adult. Differences between means of seropositive and seronegative individuals, and between males and females, were compared using the least-squared means.

We thank to Marcelo Cavicchia and to several members of the LGE for the cooperation in the fieldwork. Movement distances of five rodent and two marsupial species in forest fragments of the coastal Atlantic rainforest, Brazil. See also Tropical savanna and grassland biome.

With sexes combined, seropositive animals had a significantly greater mean HRD The likelihood of detecting hantaviral antibodies in hosts has been correlated with rodent density, biodiversity, topography, and vegetation at a macroscopic scale Biggs et al. Changes in Sin Nombre virus antibody prevalence in deer mice across seasons: Support Center Support Center. Associated Data Supplementary Materials Supplementary material 1: No specific information is available pertaining to the lifespan of Akodon montensisaside from observations that they have a short life expectancy and quick population turnover.

The B of Akodon montensis studied here had identical morphology to those detected in Brazil Yonenaga-Yassuda et al. To understand better the nature of this interaction, a one-way ANO VA was run to test for the effect of locale on seroprevalence for each season separately. Males achieve sexual maturity in montenxis to 37 days while females achieve sexual maturity between 35 and 91 days.


In contrast, we did not find significant seasonal variation in seroprevalence, although seasonal variation in seroprevalence among locales did exist. Our results of DAPI staining showed high homology among karyotypes of specimens from Argentina and those for Brazil studied with G-banding method Fagundes and Akodpn ; Silva and Yonenaga-Yassudawhich indicates a high conservation in the standard karyotype of this abundant and widely distributed species.

Nevertheless, we expect that additional studies designed to incorporate habitat diversity and seasonal and interannual variation will reveal that infection patterns for hantaviruses and other pathogens are associated with demographic and behavioral phenomena.

Individuals from 1 to 10 had no supernumerary chromosome and from 11 to 14 had the B chromosome. Akodon montensis is found in the northeastern portion of Argentina, along the southeastern coast of Brazil, wkodon throughout eastern Paraguay. Annual Review of Ecology and Systematics Effects of fragmentation on parasite burden nematodes of generalist and specialist small mammal species in secondary forest fragments of the coastal Atlantic Forest, Brazil.

Predicting presence and abundance of a small mammal species: Sigmodontinae in Misiones, Argentina. Mean home-range values m 2 are shown for males and females and for seropositive and seronegative animals. Patterns of habitat utilization of small rodents in an area of Araucaria forest in southern Brazil.

For each test, F- values on the basis of ranked home-range values are shown for sex, serostatus, and interaction effect. When transmitted to humans this virus can cause hantavirus pulmonary syndrome which can be fatal. Additionally, an interaction effect between locale and season on seroprevalence of Akodon populations was significant Table 3. The Johns Hopkins University Press.

Upon each recapture, the PIT tag number was recorded along with the specific identity, sex, age class, reproductive condition, weight, and general health of the animal, and the presence of any lesions or scars indicative of agonistic encounters possibly akoeon to hantavirus transmission Hinson et al.


Precipitation levels were considerably lower in than in Fig. Our finding of an absence of response of either population levels or seroprevalence to seasonality or to short-term precipitation patterns may be characracteristic of humid neotropical or subtropical systems with less pronounced seasonality and systems such as ours akodkn low precipitation predictability Fig.

The ADW Team gratefully acknowledges their support. Total length of Akodon montensis ranges from 90 to mm, with aakodon feet ranging from 17 to 28 mm long, ears ranging from 11 to 21 mm long, and tails ranging from 32 to 98 mm long.

In contrast to the studies of Anyamba et al.

Montane grass mouse

With seasons combined, males moved farther than females. Influence of habitat structure on a streamside small mammal community in a Brazilian rurual area. Generally, the species prefers areas with ground cover and leaf litter. As demonstrated by our study, of particular importance will be mathematical models that explicitly incorporate spatial and habitat variability and are capable of investigating these phenomena at multiple spatial scales Goodin et al.

Geographic Range Akodon montensis is found in the northeastern portion of Argentina, along the southeastern coast of Brazil, and throughout eastern Paraguay.

In our sample two females presented heteromorphic sex chromosomes XY. Comparisons of cytogenetic data among populations of Argentina and Brazil showed the presence of high intraspecific variability in Akodon montensis and some differences among regions. Akodon montensis is an abundant species distributed in Argentina, Brazil and Paraguay, and has a great chromosomal variability Kasahara and Yonenaga-Yassuda ; Musser and Carleton These results akoodon the importance of vegetational structure Goodin et al.

Additionally, the subtelocentric X chromosome presented a large positive C-band, which covered its short arm Fig.

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