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Volume 24, Number 1—January 2018
Dispatch

Rodent Abundance and Hantavirus Infection in Protected Area, East-Central Argentina

Malena Maroli1, María Victoria Vadell1, Paula Padula, and Isabel E. Gómez VillafañeComments to Author 
Author affiliations: Centro de Investigaciones Científicas y Transferencia de Tecnología a Producción, Diamante, Argentina (M. Maroli); Universidad de San Martín, San Martin, Argentina (M.V. Vadell); Instituto Nacional de Enfermedades Infecciosas Administración Nacional de Laboratorios e Institutos de Salud Dr. Carlos G. Malbrán, Buenos Aires, Argentina (P. Padula); Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires (I.E. Gómez Villafañe); Universidad de Buenos Aires, Buenos Aires (I.E. Gómez Villafañe)

Main Article

Table 2

Variation in abundance of 3 rodent species in relation to environmental characteristics in Otamendi Natural Reserve, Argentina*

Explanatory variable Akodon azarae grass mouse
 Oligoryzomys nigripes black-footed pigmy rice rat
 O. flavescens yellow pigmy rice rat
Estimate SE p value Estimate SE p value Estimate SE p value
Meteorological model (28.90%) (35.50%) (15.45%)
Intercept (riparian forest) −2.937bc 0.604 <0.001 6.033a 0.435 <0.001 −1.586 1.217 0.193
Celtis tala forest −1.426e 0.415 <0.001 −1.972b 0.678 0.004 – –
Lowland grassland with 
Cyperaceae spp. −0.923de 0.302 0.002 – – – −0.962 0.489 0.049
Highland grassland with 
Ligustrum spp. −0.161cd 0.261 0.536 −1.555b 0.520 0.003 −1.631 0.604 0.007
Highland grassland with livestock 0.169ab 0.278 0.543 – – – −0.709 0.560 0.206
Salty grassland 0.390a 0.242 0.107 – – – −0.932 0.489 0.057
Rain60 0.002 0.001 0.001 0.006 0.002 <0.001 – – –
MaxT −0.049 0.018 0.005 – – – −0.120 0.040 0.002
ONI
 0.513
 0.098
 <0.001
0.408
 0.384
 0.289
0.305
 0.270
 0.258
Vegetation model (12.34%) (11.46%) (6.37%)
Intercept −3.210 0.166 <0.001 −8.999 1.230 <0.001 −7.070 0.459 <0.001
Height −0.255 0.038 <0.001 – – – – – –
GBroad
 –
 –
 –
−0.025
 0.010
 0.013
0.020
 0.008
 0.011
Hydrological model (22.10%) (16.85%) –
Intercept (riparian forest) −5.289 0.282 <0.001 −6.068 0.636 <0.001 – – –
Celtis tala forest −1.275 0.412 0.002 −1.514 0.653 0.020 – – –
Lowland grassland with 
Cyperaceae spp. −0.732 0.300 0.015 – – – – – –
Highland grassland with 
Ligustrum spp. 0.012 0.260 0.964 −1.245 0.511 0.015 – – –
Highland grassland with livestock 0.278 0.276 0.313 – – – – – –
Salty grassland 0.560 0.241 0.020 – – – – – –
MeanWat 1.149 0.199 <0.001 1.183 0.585 0.043 – – –

*The percentage of variance explained by each model is shown in parentheses in the first line above the explanatory variables. Superscript letters show significant differences in abundance among habitat types (p<0.05 by multiple Tuckey comparisons). O. flavescens yellow pigmy rice rats did not show differences in abundance among habitat types. Height, maximum vegetation height; GBroad, fresh broadleaf cover; MaxT, maximum temperature during the month before each trapping session; MeanWat, mean water level during the month before each trapping session; ONI, Oceanic Niño Index; Rain60, monthly accumulated rainfall applying a time lag of 2 months; –, not included in the final model.

Main Article

1These authors contributed equally to this article.

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