Population dynamics of introduced rodents in Hawai'i Volcanoes National Park 1986-1990

dc.contributor.author Scheffler, Pamela Y. en_US
dc.contributor.author Foote, David en_US
dc.contributor.author Forbes Perry, Charlotte en_US
dc.contributor.author Schlappa, Karin en_US
dc.contributor.author Stone, Charles P. en_US
dc.date.accessioned 2014-03-11T19:59:30Z
dc.date.available 2014-03-11T19:59:30Z
dc.date.issued 2012-04 en_US
dc.description Reports were scanned in black and white at a resolution of 600 dots per inch and were converted to text using Adobe Paper Capture Plug-in. en_US
dc.description.abstract We determined seasonal and geographical distribution patterns for four species of introduced rodents in Hawai‘i Volcanoes National Park from 1986-1990. We surveyed black rats (Rattus rattus), Polynesian rats (R. exulans), Norway rats (R. norvegicus) and house mice (Mus musculus) along an elevation gradient ranging from 90–1,820 m above sea level in five different sites using baited snap traps. Rodent community structure differed by elevation: there were more mice at montane sites and more Polynesian rats in the lowlands. We found that breeding occurred throughout the year for all species at all sites but that seasonal peaks in reproductive activity were common. Reproduction tended to be more common in the summer months at higher elevation sites and in the winter months at lower elevations. Rodents of all species were more abundant in our study in the winter than in the summer, but the differences were not significant. The overall sex ratio did not vary from a 1:1 ratio, but seasonally there were differences in sex ratio which varied with species and site. We calculated the minimum distance traveled from an assessment line and found that larger-bodied species traveled longer average distances. Pelage color in black rats was darkest in wet forest which may have adaptive value. Black and Polynesian rats were widespread in almost all habitat types, whereas mice were limited to dry and mesic sites; Norway rats were the rarest component of our sampling and found only in wet montane forest (‘Ōla‘a Forest). en_US
dc.description.sponsorship This analysis of historical data was made possible in part thanks to support from the National Park Service Inventory and Monitoring Program and the U.S. Geological Survey Invasive Species Program. The authors would like to acknowledge additional support from the Pacific Cooperative Studies Unit, University of Hawai‘i at Mānoa. Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government. en_US
dc.identifier.citation Scheffler PY, Foote D, Forbes Perry C, Schlappa K, Stone CP. 2012. Population dynamics of introduced rodents in Hawai'i Volcanoes National Park 1986-1990. Honolulu (HI): Pacific Cooperative Studies Unit, University of Hawaii at Manoa, Department of Botany. PCSU Technical Report, 183. en_US
dc.identifier.uri http://hdl.handle.net/10125/32633
dc.language.iso en-US en_US
dc.publisher Pacific Cooperative Studies Unit, University of Hawaii at Manoa, Department of Botany en_US
dc.relation.ispartofseries Technical Report en_US
dc.relation.ispartofseries 183 en_US
dc.rights CC0 1.0 Universal
dc.rights.uri http://creativecommons.org/publicdomain/zero/1.0/
dc.subject Norway rat en_US
dc.subject black rat en_US
dc.subject Rattus exulans en_US
dc.subject Mus musculus en_US
dc.subject population dynamics en_US
dc.subject.lcsh Introduced mammals -- Hawaii -- Hawaii Island. en_US
dc.subject.lcsh Hawaii Volcanoes National Park (Hawaii) en_US
dc.subject.lcsh Polynesian rat -- Hawaii -- Hawaii Island. en_US
dc.subject.lcsh Rattus norvegicus -- Hawaii -- Hawaii Island. en_US
dc.subject.lcsh Rattus rattus -- Hawaii -- Hawaii Island. en_US
dc.subject.lcsh Mice -- Hawaii -- Hawaii Island. en_US
dc.subject.lcsh Rodent populations -- Hawaii -- Hawaii Island. en_US
dc.title Population dynamics of introduced rodents in Hawai'i Volcanoes National Park 1986-1990 en_US
dc.type Report en_US
dc.type.dcmi Text en_US
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