Diffusion and home range parameters from rodent population measurements in Panama |
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Authors: | L?Giuggioli G?Abramson Email author" target="_blank">V?M?KenkreEmail author G?Suzán E?Marcé T?L?Yates |
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Institution: | (1) Consortium of the Americas for Interdisciplinary Science, University of New Mexico, Albuquerque, NM 87131, USA;(2) Centro Atómico Bariloche, CONICET and Instituto Balseiro, 8400 San Carlos de Bariloche, Río Negro, Argentina;(3) Department of Biology, University of New Mexico, Albuquerque, NM 87131, USA |
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Abstract: | Simple random walk considerations are used to interpret rodent population data collected in Hantavirus-related investigations
in Panama regarding the short-tailed cane mouse, Zygodontomys brevicauda. The diffusion constant of mice is evaluated to be of the order of (and larger than) 200 meters squared per day. The investigation
also shows that the rodent mean square displacement saturates in time, indicating the existence of a spatial scale which could,
in principle, be the home range of the rodents. This home range is concluded to be of the order of 70 meters. Theoretical
analysis is provided for interpreting animal movement data in terms of an interplay of the home ranges, the diffusion constant,
and the size of the grid used to monitor the movement. The study gives impetus to a substantial modification of existing theory
of the spread of the Hantavirus epidemic which has been based on simple diffusive motion of the rodents, and additionally
emphasizes the importance for developing more accurate techniques for the measurement of rodent movement. |
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