Preble Meadow Jumping MouseTagging preble meadow jumping mousePreble jumping mouse Effects of Resource Addition on Preble’s Meadow Jumping Mouse (Zapus hudsonius preblei)

Principal Investigator: Ken Wilson (CSU Fishery and Wildlife Biology)

Graduate Student: Anne Trainor

Funding Agency: Colorado Division of Wildlife

Introduction: The U.S. Fish and Wildlife Service (USFWS) listed the Preble’s meadow jumping mouse (Zapus hudsonius preblei; PMJM) as a threatened species in 1998 under the Endangered Species Act (ESA) of 1973 (USFWS 1999). Upon listing, little was known about the biology and habitat requirements of this subspecies within its range along the Front Range of Colorado and southeastern Wyoming. A number of projects (e.g., long term monitoring and surveying) have collected valuable information throughout Colorado (Schorr 2001, Meaney 2000, Shenk and Sivert 1999).

There has been a rapid increase in the number of habitat conservation plans (HCPs) written for endangered and threatened species. These plans often involve some type of mitigation in return for use of habitats inhabited by T&E species. HCPs require the use of “best available” science to determine the biological needs of target species (Harding et al. 2001). While live trapping and radio telemetry monitoring data for PMJM are important to understanding species requirements, manipulation experiments provide stronger inferences and address causality.

Objectives: In some cases, mitigation for PMJM has involved habitat manipulation, e.g., replanting of willow in habitats deemed suitable for PMJM. Our primary objective is to determine how the presence of additional resources (artificial cover and food supplementation) influences the movement patterns of radio-tagged PMJM. This will be accomplished by monitoring mouse movements through radio telemetry before and after the addition of resources.

Progress: The second and final field session was successfully completed in Castle Rock, Colorado from June to August 2003. Microhabitat characteristics were measured to compare areas used intensely by Preble’s meadow jumping mouse to areas PMJM were not detected. A third trial of a manipulation experiment involving the addition of cover and food to determine how the presences of additional resources influence the distribution of individuals within a population was completed. Data analyses were completed and manuscripts will be completed Spring 2004.

Plans: Complete Master of Science degree in wildlife management at Colorado State University in Summer 2004. Submit two manuscripts to peer reviewed journals spring 2004.

Results/Products: Trainor, A. January 30, 2004. Habitat of Preble’s meadow jumping mouse and influence of resource supplementation on movements. Seminar to Fishery and Wildlife Department, Colorado State University, Fort Collins, Colorado

Trainor, A. May 29, 2004. Habitat of Preble’s meadow jumping mouse and influence of resource supplementation on movements. Preble’s Meadow Jumping Mouse Technical Working Group Meeting, Colorado Division of Wildlife, Denver, Colorado.

Research and thesis completed. Summer 2004. Anne Maura Trainor. Influence of Resource Supplementation on Movements of Preble' Meadow Jumping Mouse (Zapus Hudsonius Preblei) and Habitat Use Characteristics.