Download or read book Reproductive Ecology of the Eastern Massasauga Rattlesnake Sistrurus C Catenatus at Carlyle Lake Illinois written by Benjamin Christopher Jellen and published by . This book was released on 2005 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Population Structure by Microsatellite DNA Analysis of the Eastern Massasauga Rattlesnake Sistrurus Catenatus Catenatus at Carlyle Lake written by Michael A. Andre and published by . This book was released on 2003 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wisconsin Department of Natural Resources and U S Fish and Wildlife Service Internship Program 2011 written by Jessica. E. Kitchell and published by . This book was released on 2011 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NHS Factivities written by Illinois. Natural History Survey Division and published by . This book was released on 2002 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Life History and Reproductive Ecology of Sistrurus Miliarius Barbouri written by Teresa C. DeFrancesco and published by . This book was released on 1987 with total page 134 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 Eastern Massasauga Sistrurus Catenatus Catenatus in West Central Illinois written by Brian Jay Bielema and published by . This book was released on 1973 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling Habitat Ecology and Population Viability of the Eastern Massasauga Rattlesnake in Southwestern Lower Michigan written by Kristin Marie Bissell and published by . This book was released on 2006 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Conservation Genetics and Ecological Niche Modeling of Kirtland s Snake Clonophis Kirtlandii and the Eastern Massasauga Rattlesnake Sistrurus Catenatus Catenatus written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Conservation genetics and ecological niche modeling of Kirtland's snake, Clonophis kirtlandii, and the Eastern Massasauga rattlesnake, Sistrurus catenatus catenatus.
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 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.
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 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:
Download or read book Filling in the Gaps in Demography Phenology and Life History of the Eastern Massasauga Rattlesnake Sistrurus Catenatus written by Eric T. Hileman and published by . This book was released on 2016 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Eastern Massasauga (Sistrurus catenatus) is a small, cryptic North American rattlesnake with a distribution centered on the Great Lakes. It is listed as threatened and endangered in Canada. In the United States, ongoing population declines due to habitat loss, habitat fragmentation, and harvest led to the species being listed as threatened under the U.S. Endangered Species Act in 2016. Estimates of population parameters are essential for modeling population dynamics, assessing population viability, and elucidating the effects of land management practices on population persistence. However, conservation of Eastern Massasauga populations has been hampered by information gaps related to life history and hibernation phenology. In addition, key demographic parameter estimates are lacking for populations near the range center of the species where the largest number of Eastern Massasauga populations may still persist. Consequently, biologically realistic population viability analyses and management guidelines related to the timing of habitat management activities have been difficult to develop. In this study, I address these data gaps by providing 1) a range-wide synthesis to evaluate geographic variation in life history traits, 2) critically needed demographic estimates, population viability analysis, and prescribed burn simulations from a centrally located population, and 3) a predictive hibernation ingress/egress model to assist managers in minimizing mortality during ground-disturbing land management activities. To address life history data gaps, I compiled data from 47 study sites representing 38 counties across the range. I used multimodel inference and general linear models with geographic coordinates and annual climate normals as explanatory variables to clarify patterns of variation in life history traits. I found strong evidence for geographic variation in six of nine life history variables. Adult female snout-vent length and neonate mass increased with increasing mean annual precipitation. Litter size decreased with increasing mean temperature, and the size--fecundity relationship and age zero growth both increased with increasing latitude. The proportion of gravid females also increased with increasing latitude, but this relationship may be the result of geographically varying detection bias. Next, I used eight years of data and contemporary capture-recapture and matrix model methods to estimate population parameters for an Eastern Massasauga population near the range center of the species in Cass County, Michigan. From 2009--2016, 826 Eastern Massasaugas were captured 1,776 times. On average, sexual maturity occurred at age three in both sexes. Mean litter size was 7.6. Annual survival increased with increasing age (age zero=0.38, age 1=0.65, age 2=0.76, age ≥3 females=0.71), but declined slightly in age ≥3 males (0.66). Abundance estimates ranged from 84--140 adults and annual reproductive frequency was 0.44. Using these estimates, I developed a baseline population projection model to evaluate population persistence in Cass County and the degree to which increased mortality during spring, fall, and late fall prescribed burns might affect population growth 50 and 100 years into the future if current conditions persist. The baseline model, which incorporated current prescribed fire practices, indicated a stable population with only a 1% probability of extinction over 100 years, suggesting that management practices at this site are sustainable if they remain unchanged. Simulations of conservative increases in mortality due to fire changed the probability of extinction little over 50 years (0.000--0.003), but increased probability of extinction up to 14% over 100 years in the most pessimistic prescribed burn scenario. Last, I installed on-site weather stations at seven Eastern Massasauga study sites in Iowa, Illinois, Ohio (2 sites), and Michigan (3 sites). I identified dates of spring emergence using a combination of intensive visual searches, radio telemetry, and camera traps. I used observation data and soil temperature data from logging stations to validate a predictive egress phenology model and clarify geographic patterns of variation in the timing of Eastern Massasauga emergence. Emergence from hibernation was clearly associated with a reversal in soil temperature gradients although there were sometimes multiple reversals with hibernation egress lagging the first reversal by a week or more. Based on these patterns, I provide recommendations that minimize the risk for Eastern Massasauga mortality and avoid unnecessary curtailment of the burn season. This model has the potential to predict when prescribed fire or ground-disturbing management activities are least likely to cause direct snake mortality.
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 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 Endangered and Threatened Species of Illinois Animals written by and published by . This book was released on 2002 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
