Download or read book The Massasauga Rattlesnake Sistrurus Catenatus in Colorado written by Justin Peter Hobert and published by . This book was released on 1997 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecology and Natural History of the Desert Massasauga Rattlesnake Sistrurus Catenatus Edwardsii in Southeastern Colorado written by Andrew Richard Wastell and published by . This book was released on 2007 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Using Human Dimensions Insights to Improve Conservation Efforts for the Eastern Massasauga Rattlesnake Sistrurus Catenatus Catenatus in Michigan and the Timber Rattlesnake Crotalus Horridus Horridus in Minnesota written by Rebecca Ann Christoffel and published by . This book was released on 2007 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
Download or read book The Ecology and Morphological Variation of the Massasauga Rattlesnake Sistrurus Catenatus written by Howard Keith Reinert and published by . This book was released on 1978 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Ecology of the Desert Massasauga Rattlesnake in Colorado written by Stephen P. Mackessy and published by . This book was released on 2007 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rattles Fangs written by Lisa W. Kroeber and published by . This book was released on 2003 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Status of the Eastern Massasauga Rattlesnake at Indiana Dunes National Lakeshore written by National Park Service and published by CreateSpace. This book was released on 2013-08-28 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: The eastern massasauga rattlesnake (Sistrurus catenatus catenatus) is a candidate for federal listing as a threatened or endangered Distinct Population Segment (DPS) (U.S. FWS 2003). Although the massasauga rattlesnake is thought to be in decline throughout much of its range, only the eastern subspecies (Sistrurus c. catenatus) is currently under consideration for listing. The eastern subspecies has been described as historically ranging from central New York and southern Ontario, southwest to Iowa and Missouri (Johnson 1995; Minton 2001). This eastern subspecies encompasses all S. catenatus residing north and east of the Missouri River.
Download or read book Using Microsatellite DNA to Genetically Identify a Potential Hybrid Population of Endangered Massasauga Rattlesnakes Sistrurus Catenatus in North Central Missouri written by Michael Joseph Murphy and published by . This book was released on 2009 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: DNA-based genetic techniques can be used to identify individuals in wild populations whose ancestry is uncertain. The massasauga rattlesnake is a small rattlesnake found from central New York to southeastern Arizona. It is currently described as consisting of three subspecies: the eastern massasauga (Sistrurus catenatus catenatus), the western massasauga (Sistrurus c. tergeminus) and the desert massasauga (Sistrurus c. edwardsii). Due to morphological similarities between eastern and western massasaugas in north central Missouri (where the range of S. c. catenatus meets that of S. c. tergeminus), there is debate over the species identity of individuals in this population and the possibility that it is a hybrid population has been suggested. Here, I use microsatellite DNA from western and eastern massasaugas to determine the species identity of a central Missouri population. To do this, I used a combination of clustering analysis and distance-based phylogenetic analysis to determine the relationships among the western, eastern, and central Missouri populations. Cluster-based analysis using the program Structure showed that the central Missouri population clustered strongly with the western (tergeminus) populations. Distance-based phylogenetic analysis of populations also grouped the Missouri population with western populations and analysis of all individuals grouped the central Missouri individuals together with the western individuals. These results show that the western massasauga and central Missouri population are genetically similar, and both are highly differentiated from eastern massasauga populations. Therefore this data strongly suggests that the central Missouri population is Sistrurus c. tergeminus. This has the implications that one of the criteria for special protection status of this population has been removed and that the range of S. c. catenatus does not extend west of the Mississippi River which supports the possibility that the Mississippi River acts as a phylogeographical barrier for massasauga rattlesnakes.
Download or read book Habit and Habitat Studies of the Massasauga Rattlesnake Sistrurus Catenatus Catenatus Raf in Northeastern Illinois written by Bertrand Albert Wright and published by . This book was released on 1939 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Download or read book Spatial Ecology and Natural History of the Western Massasauga Rattlesnake sistrurus Catenatus Tergeminus in Southeastern Nebraska written by Tracy Jean Patten and published by . This book was released on 2006 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Eastern Massasauga Rattlesnake sistrurus Catenatus Catenatus Care Manual written by Andrew M. Lentini and published by . This book was released on 2013 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: ACMs are considered works in progress, since practices continue to evolve through advances in scientific knowledge. The use of information within the manuals should be in accordance with all local, state, and federal laws and regulations concerning the care of animals. The recommendations are not exclusive management approaches, diets, medical treatments, or procedures, and may require adaptation to the specific needs of individual animals and particular circumstances in each institution. Commercial entities and media identified are not necessarily endorsed by AZA. The statements presented throughout the body of the manual do not represent standards of care unless specifically identified as such in clearly marked sidebar boxes.--Publishers website.
Download or read book Responses of the Eastern Massasauga Rattlesnake Sistrurus Catenatus Catenatus to Prescribed Fire in Southwestern Michigan Wetland Prairies written by Matthew David Cross and published by . This book was released on 2009 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Status Report on the Eastern Massasauga Rattlesnake Sistrurus C Catenatus in Canada written by Wayne F. Weller and published by . This book was released on 1991 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigating Population Isolation in Michigan s Massasauga Rattlesnake Sistrurus Catenatus Catenatus written by Rachael Kropiewnicki and published by . This book was released on 2008 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
