Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"Northern leopard frog"”.
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Chemical communication in a declining North American anuran amphibian, the northern leopard frog (lithobates pipiens)
… chemical signaling in anuran groups (frogs and toads), particularly adult anurans. Previous work has focused primarily on salamander and larval anuran behavioral responses. Additionally, chemoreceptor (CR) genes have only been identified for Xenopus species with no previous …
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Sub-lethal and lethal effects of a neonicotinoid pesticide on the development of Northern leopard frog tadpoles.
… lethal and sub-lethal, developmental effects in Northern leopard frog tadpoles exposed to three concentration levels (250 ng/L, 8.5 mg/L, and 85 mg/L) of imidacloprid in a laboratory setting. Survivorship was 0% by day 23 of exposure to imidacloprid at the previously lowest known LC50 value for …
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Identification and bioactivity assessment of an antimicrobial peptide from the defensive skin secretion of the northern leopard frog, Rana pipiens
In response to the growing threat of bacterial resistance, antimicrobial peptides (AMPs) have emerged due to their broad-spectrum activity and low probability of resistance generation. In many ways, antimicrobial peptides have advantages that are difficult to match with antibiotics, and so research …
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The discovery and functional study of a bioactive peptide, QUB-3000, from the defensive skin secretion of the northern leopard frog, Rana pipiens
… from the lyophilised skin secretion of the northern leopard frog, Rana pipiens, by “shotgun” cloning. According to its molecular mass, the mature peptide was named QUB-3000. Then, QUB-3000 was synthesised by solid phase peptide synthesis (SPPS), purified by RP-HPLC. The purified synthetic …
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State-wide assessment of status, predicted distribution, and landscape-level habitat suitability of amphibians and reptiles in Montana
… in Western Toad (<i>Bufo boreas</i>) and Northern Leopard Frog (<i>Rana pipiens</i>) populations in western Montana, and identified a variety of conservation issues of concern that can be addressed through management actions (e.g., clear evidence for negative impacts of fish and importance …
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State-wide assessment of status, predicted distribution, and landscape-level habitat suitability of amphibians and reptiles in Montana
… in Western Toad (<i>Bufo boreas</i>) and Northern Leopard Frog (<i>Rana pipiens</i>) populations in western Montana, and identified a variety of conservation issues of concern that can be addressed through management actions (e.g., clear evidence for negative impacts of fish and importance …
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Anura of Eastern South Dakota: Their Distribution and Characteristics of Their Wetland Habitats, 1997-1998
… within eastern South Dakota. The chorus frog (Pseudacris triseriata triseriata and P. t. maculata), northern leopard frog (Rana pipiens) and great plains toad (Bufo cognatus) were cosmopolitan in distribution occurring in all 44 counties of eastern South Dakota. The American toad (Bufo …
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Assessing sources of variation in amphibian skin thickness: ecological and evolutionary implications
… dimorphism. Specimens of the white-lipped treefrog, Litoria infrafrenata, that display sexual dimorphism in body size and skin thickness were used to test if body size was the main determinate of sexually dimorphic skin thickness. Size corrected values did not significantly differ between males …
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Effects of Sublethal Copper Exposure on Escape Behavior and Growth of Rana pipiens Tadpoles
This research is designed to test how sublethal exposure to copper affects tadpole predator-escape behavior and how quickly tadpoles recover. After exposure, tadpoles were separated. Escape behavior was recorded for two-thirds of exposed tadpoles while one-third of the exposed population was …
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Exposure to Synthetic Antioxidants Disrupt Early Development in the Frogs Silurana Tropicalis and Lithobates Pipiens
… with TH-dependent developmental processes on the frogs Silurana tropicalis and Lithobates pipiens and affect their early stage development. To test this hypothesis, S. tropicalis embryos and L. pipiens tadpoles were exposed at the Nieuwkoop-Faber (NF) stage 9-10 and Gosner (G) stage 24-25, …