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RESEARCH ARTICLE
Contents Vol 33(7)

Three-dimensional use of space by a tropical rainforest rodent, Melomys cervinipes, and its implications for foraging and home-range size

Romina Rader A B and Andrew Krockenberger A
+ Author Affiliations
- Author Affiliations

A CRC for Tropical Rainforest Ecology and the School of Marine and Tropical Biology, James Cook University, PO Box 6811, Cairns, Qld 4870, Australia.

B Corresponding author. Email: romina.rader@jcu.edu.au

Wildlife Research 33(7) 577-582 https://doi.org/10.1071/WR04117
Submitted: 16 November 2004  Accepted: 13 September 2006   Published: 15 November 2006

Abstract

This study investigated the factors that influence the home-range size of a tropical Australian rodent, Melomys cervinipes, using radio-tagged individuals. Melomys cervinipes frequently used the canopy and, when measured according to height level, its home-range areas were much larger than calculated by traditional two-dimensional home-range calculations. Home-range size did not significantly differ between the sexes, with an average home range of 0.42 ± 0.06 ha and core area of activity of 0.091 ± 0.074 ha. M. cervinipes did not maintain exclusive home ranges and overlapped with both other focal individuals and individuals not fitted with tracking devices. There was a relationship between the core range of M. cervinipes and individual trees of the dominant canopy species at the site. Core ranges of M. cervinipes included 2 (1.96 ± 0.27) individual canopy trees independent of the area of that core range, whereas the number of individual trees within their total range was proportional to the size of that range. This suggests that M. cervinipes sets the core of its range to include a specific level of canopy resources regardless of the size required to achieve that level, but that its overall range is merely a representative sample of trees from the site.


Acknowledgments

The authors thank the Australian Canopy Crane Research Facility for permission to use the crane. This study was supported by grants awarded to R. Rader from the Cooperative Research Centre for Rainforest Ecology (Rainforest CRC) and Australian Geographic. The School of Tropical Biology, James Cook University, provided all research equipment. The assistance, advice and company provided by Bradley Howlett were much appreciated. The authors dedicate this paper to the late Richard Cooper for his enthusiasm driving the crane and for his assistance with this project. This study was authorised by Queensland EPA Permit F1/000433/01/SAA and JCU Animal Ethics Approval A679_01.


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