A Survey of the Distribution and Abundance of Spotted Salamanders in a Portion of Northern Wisconsin PDF Download
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Author: Dames & Moore
Publisher:
ISBN:
Category : Salamander populations
Languages : en
Pages :
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Author: Dames & Moore
Publisher:
ISBN:
Category : Salamander populations
Languages : en
Pages :
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Author: Dreux J. Watermolen
Publisher:
ISBN:
Category : Amphibians
Languages : en
Pages : 18
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Author:
Publisher:
ISBN:
Category : Environmental impact statements
Languages : en
Pages : 434
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Author: Terry VanDeWalle
Publisher: University of Iowa Press
ISBN: 1609382021
Category : Nature
Languages : en
Pages : 16
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Finding a salamander in the woodlands rates as one of the most enjoyable surprises of an early morning hike. Active mainly at night, these secretive, shiny, lizardlike amphibians often glow like jewels when found under the logs or rocks that many prefer. This colorful addition to Iowa’s popular series of laminated guides—the twenty-fifth in the series—will inform both amateur and professional naturalists about twenty-five species of salamanders found in the Upper Midwest states of Minnesota, Wisconsin, Illinois, Indiana, Michigan, Ohio, South Dakota, North Dakota, Kansas, Nebraska, Iowa, and Missouri. Common mudpuppies and lesser sirens spend their entire lives in water, never losing the gills that they developed as larvae; the lungless four-toed salamander distracts predators by detaching its tail; the eastern newt discourages predators by secreting poisonous chemicals from its skin; the flat-bodied hellbender, which can reach twenty-nine inches in length, breathes by absorbing oxygen through the folds of its skin. These, plus the well-named slimy, zigzag, tiger, and other salamanders in this guide, are now threatened by loss of habitat, pollution, and a deadly fungus. Terry VanDeWalle provides a complete description of each species as well as distinguishing characteristics for twenty-one subspecies, from the striking orange and yellow spots of the spotted salamander to the lichenlike patches of the green salamander to the prominent rounded head of the mole salamander. He also includes information about the salamanders’ range and habitat preferences, from twilight zones of limestone caves and crevices to seepages and spring-fed bogs. His comparisons of similar species and his comprehensive key are most helpful for identifying individuals in the field. Superb photographs by Suzanne Collins make this new guide the perfect companion for outdoor expeditions in all kinds of moist environments.
Author: Ralph A. Pfingsten
Publisher:
ISBN:
Category : Salamanders
Languages : en
Pages : 40
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Author: John H. Larsen
Publisher:
ISBN:
Category : Lungless salamanders
Languages : en
Pages : 70
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Author: Patrick Yamnik
Publisher:
ISBN:
Category :
Languages : en
Pages : 104
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Abstract: Amphibian populations are experiencing rapid declines throughout the world that are apparently driven by habitat loss and fragmentation. Of particular concern is the rapid loss of wetland habitats which serve as critical breeding habitat for many amphibian species. For many species we don't really understand the habitat requirements for reproduction. Many wetlands, especially small isolated wetlands, are being lost and replace with mitigation wetlands that may not provide the same quality habitat as the natural wetlands they replace. The spotted salamander (Ambystoma maculatum) is a key example of an amphibian species that relies on small isolated wetlands for breeding habitat. Although the spotted salamander is not endangered, it can be used as a surrogate to study habitat availability and breeding behavior. The objective of this study is to determine what characteristics of wetlands are determinants of their use by spotted salamanders for breeding. I measured eight variables for 40 ponds at the University of Mississippi Biological Field Station during 2007, including pH, canopy cover, emergent vegetation, submerged vegetation, distance to the nearest forest, hydroperiod, fish abundance, and larval mole salamander (Ambystoma talpodideum) abundance. I then correlated these variables using Spearman rank correlations and non-metric multidimensional scaling with spotted salamander egg mass density and larval survival. Emergent vegetation, hydroperiod, and larval mole salamander abundance all appeared to be positively correlated with spotted salamander egg mass deposition and larval survival. Of these factors, emergent vegetation and hydroperiod are likely to be factors affecting site selection, while the positive correlation with the mole salamander abundance is likely due to similar breeding habitat preference by two species. Because the presence of emerge vegetation appeared to be the most significant factor driving egg mass deposition, I chose to manipulate this variable in 30 ponds for the 2008 breeding season. Ten ponds were placed into each of the following treatments: increased emergement vegetation, decreased emergent vegetation, and no manipulation of emergent vegetation to determine if salamanders would switch ponds to maximize reproductive success. There was no significant difference in the change of egg mass counts between years for the treatments. The lack of change was likely due to fidelity to the breeding pond by adult salamanders. This study suggest that emergent vegetation and hydroperiod are important pond characteristics assessed by spotted salamanders but that adult salamanders may continue to see ponds after the pond characteristics are altered. Censuses of spotted salamanders using egg mass counts may not be the most sensitive measure of environmental change due to strong breeding site fidelity.
Author: Rashid Gerasimov
Publisher: Nova Science Publishers
ISBN: 9781536164701
Category : Salamanders
Languages : en
Pages : 154
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In Waterton Lakes National Park, located in southwest Alberta, Canada, under-road crossing structures were installed in 2008 to protect a population of long-toed salamander (Ambystoma macrodactylum) at Linnet Lake from mortality during breeding migrations that intersected with the park's entrance road. This compilation first investigates orientation and movement patterns of marked individuals at Linnet Lake in 2013 and 2014, and at a smaller, shallower wetland Stable Pond in 2014 to document in detail how long-toed salamanders used the terrestrial landscape around breeding sites during adult migration and juvenile dispersal. Following this, the authors use generalized linear models to model salamander occurrence and abundance in the Beaver Hills region of north-central Alberta as a function of land cover type and pocket gopher density. The authors go on to address whether any ecological barriers exist in the distribution range of the two newt species N. strauchii and N. crocatus. According to the findings of this study, an identity test was found to be significantly different from the null distribution, whereas a background test was not significantly different from the null distribution. The concluding chapter summarizes the processes by which light is converted into neural signals by rods and cones and then transmitted to downstream neurons in the retina, with a focus on salamander photoreceptors. The different types of photoreceptor cells and other light-sensitive cells in salamanders and their role in vision are also discussed.
Author: Mitchell Thomas Bergeson
Publisher:
ISBN:
Category :
Languages : en
Pages : 174
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Author: Bailey Watkins
Publisher:
ISBN:
Category : Climbing salamanders
Languages : en
Pages : 0
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