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File Movement and habitat use of Eastern hellbenders (Cryptobranchus alleganiensis alleganiensis) following population augmentation
by Morgan Harris — published Aug 10, 2020 — last modified Jul 26, 2023 01:33 PM — filed under: , , , , ,
With amphibian declines at crisis levels, translocations, including population augmentations, are commonly used for amphibian conservation. Eastern Hellbenders (Cryptobranchus alleganiensis alleganiensis) have declined to low densities in many areas of their range, making them ideal candidates for population augmentation. Both wild adults and captive-reared juveniles have been used for augmentations, but their suitability has never been directly compared. Herein, we use radio telemetry with Eastern Hellbenders to examine patterns of site fidelity, movement, and habitat use over a 2-yr period for adult residents, wild adult translocates, and captive-reared juvenile translocates. We used generalized linear models and generalized linear mixed models to identify temporal trends and explore the effects of residential status (resident vs. translocate) and origin/age (captive-reared juveniles vs. wild adults) on various ecological and behavioral traits relating to habitat. Site fidelity was high in adult residents and wild adult translocates, but lower in captive-reared juvenile translocates. Both adult and juvenile translocates had greater mean movement distances than residents, leading to larger home range sizes, but these differences decreased over time. Wild adult translocates had a higher probability of using artificial nest rocks than adult residents or captive-reared juvenile translocates. This pattern was most prevalent early in the study, indicating these shelters are particularly useful during the transition to release sites. Captive-reared juvenile translocates had lower site fidelity and utilized suboptimal habitat (smaller and fewer shelter rocks) compared to wild adults. Compared to previous studies, translocations had fewer negative effects on site residents or wild translocates and might be effective at promoting growth of Hellbender populations. However, translocations of captive-reared juveniles were less successful. As we are uncertain whether captive-rearing or ontogeny led to these differences, both longer head-starting times and conditioning should be explored to improve outcomes in captive-reared juvenile cohorts.
Located in Information Materials / Research / Artificial Nest Box Research
National Plant Disease Recovery System
by Tab Manager — published May 18, 2021 — filed under: , , ,
The National Plant Disease Recovery System (NPDRS) is called for in Homeland Security Presidential Directive Number 9 (HSPD-9) which was issued in February of 2004. The purpose of the NPDRS is to ensure that the tools, infrastructure, communication networks, and capacity required to mitigate the impact of high consequence plant disease outbreaks are such that a reasonable level of crop production is maintained in the U.S.
Located in Resources / General Resources Holdings
Project Nebraska Northwest Landscape Restoration
by Rhishja Cota — published Oct 27, 2022 — filed under: , ,
USFS, NRCS, and partners have conducted prescribed burns or mechanically removed cedar on approximately 40,000 acres in the Sandhills grasslands.
Located in Resources / … / Projects / Fire-Community & Infrastructure
Noninvasive Method for a Statewide Survey of Eastern Hellbenders Cryptobranchus alleganiensis Using Environmental DNA
by Amy J. Santas, Tyler Persaud, Barbara A. Wolfe, and Jenise M. Bauman — published Feb 10, 2023 — last modified Jul 26, 2023 01:40 PM — filed under: , , , , ,
Traditional survey methods of aquatic organisms may be difficult, lengthy, and destructive to the habitat. Some methods are invasive and can be harmful to the target species. The use of environmental DNA (eDNA) has proven to be effective at detecting low population density aquatic macroorganisms. This study refined the technique to support statewide surveys. Hellbender presence was identified by using hellbender specific primers (cytochrome b gene) to detect eDNA in water samples collected at rivers, streams and creeks in Ohio and Kentucky with historical accounts of the imperiled eastern hellbender (Cryptobranchus a. alleganiensis). Two sampling protocols are described; both significantly reduced the amount of water required for collection from the previously described 6 L collection. Two-liter samples were adequate to detect hellbender presence in natural waterways where hellbenders have been previously surveyed in both Ohio and Kentucky—1 L samples were not reliable. DNA extracted from 3 L of water collected onto multiple filters (1 L/filter) could be combined and concentrated through ethanol precipitation, supporting amplification of hellbender DNA and dramatically reducing the filtration time. This method improves the efficiency and welfare implications of sampling methods for reclusive aquatic species of low population density for statewide surveys that involve collecting from multiple watersheds.
Located in Information Materials / Research / Peer-reviewed Science
Project C header North Warner Multi-Ownership Forest Health
by Rhishja Cota — published Oct 27, 2022 — filed under: , ,
More than 15,000 acres were treated for hazardous fuels and to improve wildlife habitat using JCLRP funding.
Located in Resources / … / Projects / Prescribed Burn
Project Northern Arizona Habitat Restoration and Wildfire Risk Reduction
by Rhishja Cota — published Oct 27, 2022 — filed under: ,
The Northern Arizona Habitat Restoration and Wildfire Risk Reduction Partnership Project would mechanically treat woody species, implement prescribed burning, develop new wildlife watering facilities, and develop education and outreach to improve habitat for large game and grassland obligate species, reduce fire risk to rural communities and Grand Canyon National Park, promote groundwater recharge, and build community understanding of and support for grassland restoration activities.
Located in Resources / … / Projects / Wildfire
File NRCS WLFW Outcomes Assessment 2012-2018 (released 2021)
by Bridgett Costanzo — published Oct 28, 2022 — last modified Jul 24, 2023 11:26 AM — filed under: , , , , , , , , , ,
An outcomes assessment report completed under a contract to Dr. JJ Apodaca from NRCS-WLFW. This document is being shared with conservation partners but broad or public sharing is not approved.
Located in Information Materials / Research / WLFW Outcomes: Funded Research
NUOnet (Nutrient Use and Outcome Network) database
by Tab Manager — published Mar 26, 2021 — filed under: , , , ,
NUOnet Vision: Efficient use of nutrients to optimize production and product quality of food for animals and humans, fuel and fiber in a sustainable manner that contributes to ecosystem services.
Located in Resources / General Resources Holdings
Organization Oak Ridge National Laboratory
by Matthew Cimitile — published Dec 12, 2012 — last modified May 31, 2024 02:41 PM — filed under: , , ,
ORNL is a multiprogram science and technology laboratory managed for the U.S. Department of Energy by UT-Battelle, LLC. ORNL's mission is to deliver scientific discoveries and technical breakthroughs that will accelerate the development and deployment of solutions in clean energy and global security, and in doing so create economic opportunity for the nation.
Located in LP Members / Organizations Search
Organization Oregon State University
by Rosanne Hessmiller — last modified May 31, 2024 03:10 PM — filed under: , , , ,
Oregon State is an international public research university that draws people from all 50 states and more than 100 countries. We go wherever the challenges are, push ourselves to the very edge of what’s known and keep going. We are determined to forge solutions. We are diverse and welcoming. We embrace our responsibility to Oregon and the world, building a future that’s smarter, healthier, more prosperous and more just. We see what could be and have worked relentlessly for 150 years to make it so.
Located in LP Members / Organizations Search