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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Generally, the species prefers areas with ground cover and leaf litter.
If the immediate environment and weather are favorable, mating can take place year round. ADW doesn’t cover all species in the world, nor does it include all the latest scientific information about organisms we describe.
An interaction effect between serostatus and sex on longevity was significant in 1 locale R3B and 1 year Total length of Akodon montensis ranges from 90 to mm, with hind 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.
Variants of sex a,odon in the females of Akodon montensis with Giemsa staining: Akodon montensis is a small rodent with a heavy body that is often described as closely resembling a vole. Population characteristics in relation to seroprevalence of Hantavirus. Experimental evidence for reduced rodent diversity causing increased hantavirus prevalence. Population density was calculated for A.
Effects of climate and food availability on four rodent species in southeastern Brazil.
Our analyses revealed that seropositive animals exhibit several noteworthy behavioral and life-history modifications, in particular that they have larger home ranges than do seronegatives; exhibit greater maximum distance moved; have greater home range displacement between sampling sessions, particularly those individuals that are seroconverting during the same period; and have greater longevity, especially among males.
Sampling localities of Akodon montensis analyzed in this montesis. Akodon montensis can be found at elevations of m, but is more common at elevations of m or higher. RNBM covers about km 2 and is divided into an inner conservation core, dominated by 1 large forest fragment, the largest extant UPAF forest akoron in Paraguay, and an outer buffer area. Predicting presence and abundance of a small mammal species: These represent observable behavioral effects of Hantavirus infection in a natural host, all of which are modifications that would wkodon horizontal transmission of the virus.
In birds, naked and helpless after hatching. As currently understood, the montane akodont, Akodon montensisis limited to an area in southern Brazil Geise et al. Secondly, some members of the genus Akodon have a significant impact on agriculture by foraging on crops e.
Previous studies examining ecological variables e. Reproductive efforts of male Akodon montensis occurs via a four-stage process. An interaction effect on individual longevity between sex and serostatus was highly significant Table 5. Simple and direct associations between seroprevalence levels and either seasonality or precipitation may be less characteristic of humid neotropical or subtropical systems.
Two-way ANOVAs were conducted to assess the relationship between longevity and the serostatus and sex of individuals for all data combined, and for each season, locale, and year separately. Higdon, ; Kittlein, ; Wienke and Yahnke, Click here to view. Management of the area as a biosphere reserve provides some relative control to compare areas surrounding the Reserve that are undergoing rapid land-cover conversion.
In our sample two females presented heteromorphic sex chromosomes XY.
Montane grass mouse
Acrocentric and subtelocentric variants of X chromosome had positive C-bands in the pericentromeric regions Fig. Genetics and Molecular Biology 293: The third stage, regression of activity and spermatogenesis, and the fourth stage, rest, take place from March to July the dry season. The Animal Diversity Web is an educational resource written largely by and for college students. Akodon montensis is omnivorous. Because most analyses of variance ANOVAs described below were of unbalanced design, tests for significant differences among group means were based on comparisons of least-squared means, which is appropriate for unbalanced design Sokal and Rohlf Endemic hantavirus infection impairs akodom winter survival of its rodent host.
ADW: Akodon montensis: INFORMATION
Notably, none of these reports is based on studies in Paraguay or other localities near the western edge of the species’ distribution Cartes ; Di Bitetti et al.
Articles from Comparative Cytogenetics are provided here courtesy of Pensoft Publishers. Aside from barn owlslittle information is available on the major predators of Akodon montensis. Home-range displacement was calculated as the straight-line distance between the UD centroid of an individual during 1 trapping session and the centroid during a subsequent session. Associated Data Supplementary Materials Supplementary material 1: The brownish pelage of Akodon montensis helps it blend in with leaf litter and montemsis predators.
First, recrudescence of spermatogenesis occurs, followed by the act of mating.
We note that longevity, as measured in mark-recapture sampling such as this, can confound actual longevity with site fidelity. We hypothesize that such associations are less generally applicable than had been proposed by the earlier investigators, at least in humid subtropical ecosystems that harbor communities of high species richness Redford et al.
Systematics of Species of the Genus Akodon Rodentia: