The Recovery (Delisting) of the Columbian White-Tailed Deer (CWTD) Contact Information: Jackie Ferrier, Jackie [email protected], 360-484-3482
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1. Title: The Recovery (Delisting) of the Columbian White-tailed Deer (CWTD) Contact Information: Jackie Ferrier, [email protected], 360-484-3482 Table 1. Partners in The Recovery (Delisting) of the Columbian White-tailed Deer REFUGES Willapa National Wildlife Refuge Complex Jackie Ferrier- Project Leader Manages Julia Butler Hansen Refuge for the Columbian white-tailed deer (JBH) and other refuges in Willapa NWR Complex. Member of the CWTD Working Group. Supervised development of preparation of the Emergency Translocation EA and associated documents. Supervised translocation efforts; monitoring efforts; predator control efforts; and outreach to various partners including private landowners, Tribes, and NGOs. Paul Meyers- Lead CWTD Biologist for Refuges Managed and conducted CWTD translocations in 2009, 2010, 2012, and current efforts underway in 2013. Extensive experience in trapping and handling wildlife, including deer, moose, ocelots, margays, and numerous bird species. Experience in handling and management of schedule II drugs for animal sedation. 20 years’ experience in wildlife management and research including translocations, surveys, monitoring, and research design. Author of numerous reports, proposals, peer-reviewed publications, and NEPA documents, including primary author of the 2012 and 2013 CWTD translocation EAs and Section 7 documents. Ridgefield National Wildlife Refuge Complex Chris Lapp- Project Leader Member of the CWTD Working Group, assisted in the preparation of the Emergency Translocation EA and supervised translocation efforts; monitoring efforts; predator control efforts; and outreach to various partners including private landowners, Tribes, and NGOs. Alex Chmielewski - Ridgefield National Wildlife Refuge Wildlife Biologist Assisted with CWTD translocations and monitoring. Experienced with wildlife capture and handling techniques. Also experienced with telemetry and wildlife monitoring study design and implementation. Have prepared numerous Sect 7 consultations and NEPA documents ECOLOGICAL SERVICES Washington Fish and Wildlife Office Theodore Thomas- CWTD Regional Recovery Lead (Ecologist) Team member of the CWTD Working Group. Serves as Ecological Service’s Regional Lead for CWTD, since 2001. Developed (co-authored) Section 10 permits for Animal Damage Management among participating agencies. Assisted with several CWTD translocations during past decade. Develops listing, critical habitat rules, and recovery planning documents. Oregon Fish and Wildlife Office Rebecca Toland- CWTD Oregon Recovery Lead (Wildlife Biologist) Member of CWTD Working Group, worked extensively on the 2013 Emergency Translocation of CWTD (wrote the Biological Opinion, drafted the Animal Damage Management Plan, assisted in developing NEPA documents, assisted in capture and relocation of CWTD), primary author of the 2013 CWTD 5-year status review, primary author of the 2014 CWTD CRI proposal. 1 2. Statement of Need: The Columbia River Distinct Population Segment (DPS) of Columbian white-tailed deer (CWTD) was federally listed as endangered in 1967, initially under the authority of the Endangered Species Preservation Act and subsequently under the Endangered Species Act (USFWS 2013a). The November 2013 5-year status review of CWTD recommended reclassification of the DPS from endangered to threatened and stated that the U.S. Fish and Wildlife Service (Service) is close to fully meeting its recovery objectives for CWTD (USFWS 2013a). With a large infusion of one-time funding, the Service could accelerate the recovery of CWTD, meet the delisting criteria for the DPS, and begin a delisting proposal in FY 2017. This project proposes to implement activities to augment and support the subpopulations at Ridgefield National Wildlife Refuge (Ridgefield NWR) and the Mainland Unit of the Julia Butler Hansen Refuge for Columbian white-tailed deer (JBH) in order to meet or exceed the minimum viability threshold in both subpopulations. Historically, CWTD were common in riparian areas along major rivers west of the Cascade Mountains in Oregon and Washington, with a range extending from Grants Pass, Oregon, in the south, to The Dalles, Oregon, in the east, and along the Cowlitz River to the north. The decline in CWTD numbers was rapid with the arrival and settlement of pioneers in the fertile river valleys (Gavin 1979). Conversion of brushy riparian land to agriculture, urbanization, uncontrolled sport and commercial hunting, and perhaps other factors caused the extirpation of this deer over most of its range by the early 1900s (Gavin 1979). Despite the precipitous decline, the Service has worked diligently on CWTD recovery. A clear path to delisting CWTD (as it is currently defined with regard to population and distribution goals) now exists. Delisting criteria call for at least 400 CWTD, in at least 3 “viable and secure” subpopulations, where “viable” is defined as a minimum November population of at least 50 deer and “secure” is defined as habitat protected from adverse human activity and relatively safe from natural phenomena (USFWS 1983). Currently, the total population estimate for the Columbia River DPS is 603 deer, with 4 secure subpopulations (JBH Mainland Unit, JBH Tenasillahe Island Unit, Ridgefield NWR, and Puget Island). However, only two of the secure subpopulations are currently considered viable (Puget Island and JBH Tenasillahe Island Unit) (USFWS 2013a). A recent large-scale, cross-program effort highlights the Pacific Region’s prioritization of CWTD recovery. In 2013, in response to the threat of an imminent dike failure at JBH, the Service invested substantial staff time and resources to translocate 37 CWTD from the JBH Mainland Unit to Ridgefield NWR, which is 50 miles upriver from JBH (USFWS 2013b). While creating a new secure subpopulation, it came at the expense of both a reduction in the JBH Mainland Unit subpopulation to below 50 animals, and a net loss of 70 acres of CWTD habitat (via the creation of a new setback dike to protect the JBH Mainland Unit from imminent flooding). Region 1 is committed to managing and supporting CWTD at Ridgefield NWR to ensure that the new subpopulation grows and ultimately stabilizes at 80 deer (the population goal for Ridgefield NWR as set in the CCP) (USFWS 2013a). Management needs at Ridgefield include, but are not limited to, monitoring, continued predator control, an additional translocation of CWTD to supplement Ridgefield NWR’s subpopulation, and habitat enhancement. Furthermore, now that a setback dike has been constructed at JBH, the Service is committed to supporting the JBH Mainland Unit subpopulation to ensure its return to its previous status as a viable and secure subpopulation (USFWS 2013a). The JBH Mainland Unit will require significant habitat work to compensate for the 70 acres of land lost to the setback levee. In addition, predator control will be required to increase fawn recruitment and grow the population to former, stable levels above 80 to 100 deer. 2 One of the key limiting factors to recovery has been the lack of contiguous land that provides adequate protection (i.e., secure) and is large enough to support a viable subpopulation. The establishment of additional viable and secure subpopulations has been a long-term goal of the recovery team since the initial listing. The Service had early success at Tenasillahe Island, but subsequent translocation efforts to smaller parcels resulted in subpopulations of less than 50 animals. Ridgefield NWR is the largest tract of secure habitat that has been available for translocation since listing, and additional translocations will quite likely bring Ridgefield NWR’s current nascent population to a self-sustaining level. Should that take place in parallel with regrowth of the JBH Mainland Unit subpopulation, the establishment of two additional viable and secure subpopulations would occur (in addition to the currently viable and secure subpopulations on Puget Island and JBH Tenasillahe Island Unit). This result would allow us to not only meet, but to exceed the delisting criteria, providing CWTD with the best chance for a robust recovery. In support of this assertion, the Minimum Viable Population (MVP) analysis for this DPS (Skalski 2013) suggests nearly a four-fold decrease in extinction probability over 60 years with 4 secure subpopulations of 50 rather than 3 (0.5 percent vs. 1.9 percent, respectively). In addition, a fourth subpopulation of 80 animals (which the Ridgefield NWR subpopulation is expected to reach) reduces the 100-year extinction probability of the viable and secure subpopulations alone from 3.4 percent to 1.8 percent (i.e., roughly half). Extinction probabilities in this range would put the DPS on track for a robust recovery. If the Columbian White-tailed Deer Cooperative Recovery Initiative proposal is not funded, full recovery would likely be delayed. The minimum criteria for delisting would eventually be met; however without habitat enhancement, the JBH Mainland Unit subpopulation may take longer to stabilize, and the direction of the Ridgefield NWR subpopulation would remain uncertain (successful establishment of a subpopulation normally takes several translocation efforts). As such, a longer period of monitoring would probably have to occur before delisting discussions could be initiated. In addition, the existing recovery criteria do not contain a temporal element specifying how long the minimum populations are to be maintained prior to delisting. The presence of four viable and secure