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Book COSEWIC Assessment and Update Status Report on the Massasauga Sistrurus Catenatus in Canada

Download or read book COSEWIC Assessment and Update Status Report on the Massasauga Sistrurus Catenatus in Canada written by and published by . This book was released on 2002 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: Committee on the Status of Endangered Wildlife in Canada (COSEWIC) status reports are working documents used in assigning the status of wildlife species suspected of being at risk. This document includes both an assessment and status report on the massasauga (Sistrurus catenatus) in Canada. It includes species information, distribution, habitat, and biology information, as well as population sizes and trends, limiting factors and threats, special significance of the species, and existing protection or other status.--Includes text from document.

Book Modeling Habitat Suitability and Population Demographics of the Eastern Massasauga Rattlesnake in Managed Lands in Southwestern Michigan

Download or read book Modeling Habitat Suitability and Population Demographics of the Eastern Massasauga Rattlesnake in Managed Lands in Southwestern Michigan written by Robyn Leah Bailey and published by . This book was released on 2010 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Draft Status Report on the Eastern Massasauga Rattlesnake Sistrurus C Catenatus in Canada

Download or read book Draft Status Report on the Eastern Massasauga Rattlesnake Sistrurus C Catenatus in Canada written by Wayne Frederick Weller and published by . This book was released on 1991 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Second International Symposium and Workshop on the Conservation of the Eastern Massasauga Rattlesnake Sistrurus Catenatus Catenatus

Download or read book Second International Symposium and Workshop on the Conservation of the Eastern Massasauga Rattlesnake Sistrurus Catenatus Catenatus written by Bob Johnson and published by Scarborough, Ont. : Toronto Zoo. This book was released on 1999 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Final Report on the Status and Distribution of the Eastern Massasauga Sistrurus Catenatus Catenatus Rafinesque 1818 in Illinois

Download or read book Final Report on the Status and Distribution of the Eastern Massasauga Sistrurus Catenatus Catenatus Rafinesque 1818 in Illinois written by Ellin Beltz and published by . This book was released on 1992 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Cuyahoga Valley National Park N P Rural Landscape Management Program

Download or read book Cuyahoga Valley National Park N P Rural Landscape Management Program written by and published by . This book was released on 2003 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book U S 24 Napoleon to Toledo Lucas and Henry Counties

Download or read book U S 24 Napoleon to Toledo Lucas and Henry Counties written by and published by . This book was released on 2006 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Endangered and Threatened Species Eastern Massasauga Rattlesnake Status Us Fish and Wildlife Service Regulation Fws 2018 Edition

Download or read book Endangered and Threatened Species Eastern Massasauga Rattlesnake Status Us Fish and Wildlife Service Regulation Fws 2018 Edition written by The Law The Law Library and published by Createspace Independent Publishing Platform. This book was released on 2018-10-24 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Endangered and Threatened Species - Eastern Massasauga Rattlesnake - Status (US Fish and Wildlife Service Regulation) (FWS) (2018 Edition) The Law Library presents the complete text of the Endangered and Threatened Species - Eastern Massasauga Rattlesnake - Status (US Fish and Wildlife Service Regulation) (FWS) (2018 Edition). Updated as of May 29, 2018 We, the U.S. Fish and Wildlife Service (Service), determine threatened species status under the Endangered Species Act of 1973 (Act), as amended, for the eastern massasauga rattlesnake (Sistrurus catenatus), a rattlesnake species found in 10 States and 1 Canadian Province. The rule adds this species to the Federal List of Endangered and Threatened Wildlife. We have also determined that the designation of critical habitat for the eastern massasauga rattlesnake is not prudent due to an increased risk of collection and persecution. This book contains: - The complete text of the Endangered and Threatened Species - Eastern Massasauga Rattlesnake - Status (US Fish and Wildlife Service Regulation) (FWS) (2018 Edition) - A table of contents with the page number of each section

Book Landscape Ecology Approaches to Eastern Massasauga Rattlesnake Conservation

Download or read book Landscape Ecology Approaches to Eastern Massasauga Rattlesnake Conservation written by Eric Mitchell McCluskey and published by . This book was released on 2016 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Eastern Massasauga Rattlesnake (Sistrurus catenatus catenatus) is a rare species across its range and is thought to be experiencing widespread population declines. Application of conservation-oriented management practices to this species is hindered by incomplete knowledge of the spatial distribution of populations and suitable habitat. To address this obstacle to conservation efforts I developed species distribution models (SDMs) for northeastern Ohio and Michigan and incorporated the resulting habitat suitability maps (HSMs) in a range of landscape ecology applications. These models were generated using the software program Maxent and a series of environmental variables that represent different elements of Eastern Massasauga habitat association, including vegetation attributes (Landsat derived vegetation indices; LiDAR) and relative elevation (topographic position index). The Maxent model with the best predictive capacity to identify extant northeastern Ohio populations used location data from across the state. The model selected LiDAR data as the top contributing variable. Northeastern Ohio is a priority for Eastern Massasauga conservation in the state so I also conducted an analysis of historical land use and land cover change to better understand the distribution of populations and habitat in this region. I used object-based classification techniques to analyze historical aerial photographs (covering ~75 years) and found that present day populations and suitable habitat largely coincided with abandoned agricultural fields. In the absence of natural disturbance agents, agricultural fields that were allowed to go fallow represented an important source of early successional habitats that are vital to Massasauga. The early successional, open canopy habitats that Eastern Massasauga rely on are not permanent fixtures in this landscape making habitat management a necessity. The Michigan SDM was on a much broader scale than the Ohio modeling effort incorporating 60 populations distributed across the lower third of Michigan. The Michigan SDM selected the topographic position index at a 1 km scale as the best predictor variable. This index uses a digital elevation model to provide information on relative peaks or valleys depending the scale of analysis. Importantly, this variable identified the low lying areas more prone to accumulate water and exhibit the moist conditions Massasauga prefer. The widespread distribution of Massasauga populations in Michigan also presented the opportunity to assess habitat availability and connectivity. Using the HSM from the Michigan SDM, I quantified the number of large, contiguous habitat patches and their protected status. Most were located on private land holdings. I compared least cost path (LCP) distances and distance-weighted metrics using three different resistance layers. I found LCPs based on raw HSM values were shorter than class-weighted HSM or land cover based resistance layers. Therefore conservation planners need to carefully consider the underlying resistance layers they use for connectivity based decisions. I also generated a range-wide SDM under different climate change scenarios to provide a future perspective on Massasauga conservation and evaluate potential shifts in habitat suitability and identify at-risk populations. The climate SDM indicated that southern Massasauga populations appear more at risk to changing conditions that may be unfavorable to the species.

Book Landscape Genetics Demographic Models and Conservation of the Eastern Massasauga Rattlesnake Sistrurus Catenatus

Download or read book Landscape Genetics Demographic Models and Conservation of the Eastern Massasauga Rattlesnake Sistrurus Catenatus written by Scott Anthony Martin and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Successful conservation actions require a detailed understanding of how individuals interact with their environment. For many threatened and endangered species, anthropogenic changes to their landscape have created barriers separating formerly connected populations. This isolation can have profound impacts on the long-term viability of these populations and ultimately the conservation status of the species. For example, as populations become more isolated, they may enter the “extinction vortex” where small populations experience high levels of inbreeding and genetic drift depressing demographic rates, driving the population into a positive feedback loop that can lead to a decline in numbers and eventual extinction. However, if barriers to movement are not complete, even infrequent dispersal between populations can counter potential vortex effects by bolstering local population sizes and introducing new genetic material. Determining if populations are connected via dispersal or if they are isolated is a difficult question with no single best approach. For the Federally threatened Eastern Massasauga Rattlesnakes, Sistrurus catenatus, their reclusive, sedentary lifestyle make many field-based methods for generating this information difficult and unreliable without unrealistic investments of time and resources. In my thesis, I used information from DNA single nucleotide polymorphisms (SNPs) from neutral genetic markers to address the following three fundamental questions regarding how S. catenatus move through their landscape in Ohio and how this information can be used to evaluate proposed activities for their conservation: (1) Do snakes in scattered habitat patches across Northeastern Ohio belong to a single connected population, a metapopulation with infrequent dispersal, or isolated populations? I used 1000s of DNA SNPs to reconstruct a pedigree across 86 individuals and showed that no individuals have moved between habitat patches separated by more than a few meters in the last three generations. This is despite known movements of over 2 km by individual snakes in other populations of this species found in more continuous habitat. From these results, I concluded that S. catenatus in NE Ohio is split into five genetically distinct populations in an area smaller than 15 km2 with no recent connectivity. (2) What landscape features drive the observed lack of connectivity? I next used the same SNP dataset with a second SNP dataset collected from 103 S. catenatus from a large population in Central Ohio to model landcover features that potentially impact resistance to movement between local habitat patches. I found that an inherent landscape feature, elevation, and contemporary landcover, specifically roads, were the main barriers to connectivity. I then used the resistance maps and pedigrees for S. catenatus populations in NE Ohio and Central Ohio to estimate the resistance values between all pairs of closely related individuals and used those to estimate dispersal kernels around each population. The kernels results reinforced our previous finding of no contemporary connectivity between S. catenatus populations in this region. (3) How would proposed management actions impact the demographic viability of S. catenatus in NE Ohio? The habitat occupied by populations of S. catenatus in NE Ohio has been targets of active management to prevent vegetation succession, and there has been increased interest in additional habitat management. Suggested management actions for individual S. catenatus populations have focused on increasing habitat sizes, increasing the frequency of woody vegetation removal, creating habitat between populations, and translocating snakes between populations. I built forward-in-time simulations of population trends under current management and five alternative management activities using resistance maps that I previously developed in Population Viability Analysis (PVA) models. I found that connectivity improvements via the formation of new habitats (and ideally new populations) between the current populations or a hybrid connectivity/translocation strategy offered the greatest improvement towards both overall population size and the number of occupied patches. These connectivity models were superior to the base scenario representing no changes to management. Overall, my research has generated novel tools and approaches based on landscape genetics and demographic modeling for conservation of endangered and threatened species in fragmented landscapes. When applied to S. catenatus population is in NE Ohio, these approaches have provided new and significant insights on contemporary population structure in S. catenatus in NE Ohio, how the landscape created the observed patterns, and how this information can be used to generate management recommendations to promote the long-term persistence of this threatened reptile.