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.
Results
Showing 1 to 20 of 22 for “"Agkistrodon"”.
-
Behavioral Responses By Cottonmouths (Agkistrodon Piscivorus) To Chemical And Visual Predator Cues
… may elicit defensive responses. Cottonmouths (Agkistrodon piscivorus) exhibit an array of antipredatory behaviors that have been thoroughly characterized in response to human aggressors, but their responses to cues from other predators are poorly known. I conducted three experiments to evaluate …
-
Genetic Structure of the Copperhead (Viperidae: Agkistrodon Contortrix Mokasen) at its Most Northern Distribution
… the molecular ecology of the Copperhead (<em>Agkistrodon contortrix</em>), other than to evaluate male reproduction in a laboratory setting and phylogenetic history. Thus, employing DNA-based molecular techniques to study the natural history of <em>A. contortrix</em> will broaden our knowledge …
-
Morphology and Cranial Kinesis of the Jaw Apparatus in the Cottonmouth Snake, Agkistrodon Piscivorus
Made available in DSpace on 2014-12-12T01:27:39Z (GMT). No. of bitstreams: 1 7309964.pdf: 3951918 bytes, checksum: 7500313c5c5deeb927164dd021507a34 (MD5) Previous issue date: 1972
-
Effects of Temperature on Foraging, Endurance, and Sprint Speed in Agkistrodon Piscivorus and Nerodia Sipedon
… water snake (Nerodia sipedon) and Cottonmouth (Agkistrodon piscivorus). Dietary data for both species from a cold Ozarks stream habitat revealed that A. piscivorus does not consume aquatic prey at this site while N. sipedon is primarily piscivorous. I examined foraging success at water …
-
Food Habits, Growth, Conversion Efficiency and Response to Prey Odors of the Copperhead, Agkistrodon Contortrix
Food habits, conversion efficiency, and tongue flick rate (TFR) during exposure to food odors were investigated during this study. Sixty-one adult copperheads were examined for prey remains and yielded 31 prey items of which 50% were small mammals. Captive neonates were observed to feed only on …
-
Evidence of Non-Strike Induced Chemosensory Searching by Eastern Copperheads (Agkistrodon Contortrix) During Cicada Predation
… active foraging by eastern copperheads, <italic>Agkistrodon contortrix</italic>, contradicts its description as an envenomation-reliant ambush predator. Evidence of active foraging through non-strike induced chemosensory searching (NSICS) was previously found in cottonmouths (<italic>A. …
-
Venom Expelled by Cottonmouths (Agkistrodon Piscivorus) Across Different Prey Sizes, Prey Taxa, and Snake Body Temperatures
<p>Pit vipers possess a sophisticated venom delivery system enabling them to efficiently disable prey. To avoid retaliatory countermeasures, pit vipers typically release envenomated prey which are then trailed and consumed after succumbing to venom effects. Successful retrieval of released prey …
-
Factors Influencing Venom Expenditure During Defensive Bites by Cottonmouths (AGKISTRODON PISCIVORUS) and Rattlesnakes (CROTALUS VIRIDIS, CROTALUS ATROX)
… during defensive bites by cottonmouths <em>(Agkistrodon piscivorus)</em>, western rattlesnakes <em>(Crotalus viridis)</em> and western diamondbacks <em>(C. atrox)</em>. Defensive bites were elicited by models of human limbs (warm saline-filled gloves) and by voluntary venom extractions into a …
-
Population Demographics And Active Foraging Behavior Of Copperheads (Agkistrodon Contortrix) At A Recreational Site In Eastern Kentucky
… site in Kentucky where copperhead snakes (Agkistrodon contortrix) are known to aggregate and forage. Capture-recapture data were used to 1) describe the demographic structure of the population and 2) construct models that quantify the probability of apparent survival (S) and recapture (p) …
-
Behavioral and Physiological Evidence for Musk Gland Secretions as a Chemical Alarm Cue in the Cottonmouth, Agkistrodon Piscivorus
… function as an alarm signal in the cottonmouth (Agkistrodon piscivorus), using behavioral and physiological response variables. In a repeated-measures experiment snakes were exposed to solutions of musk gland secretions, integumentary chemicals from conspecifics, and distilled water as a blank …
-
The Ontogeny of Spatial Ecology and Habitat Use in a Population of Cottonmouths (Agkistrodon Piscivorus) in Southwest Missouri
… I tracked eight juvenile cottonmouths (Agkistrodon piscivorus) during the summer and fall of 2008 to determine how their home ranges, rates and magnitudes of movement, and microhabitat use compared to adults previously tracked at the same site. When gravid females were excluded from the …
-
Comparative Phylogenetic Analysis in Populations of the Western Cottonmouth (Agkistrodon Piscivorus Leucostoma) Distributed in Three North American Drainage Basins
The western cottonmouth is distributed in three major North American drainage basins. Using a molecular phylogenetic analysis, Knights et al. (1992) observed that western cottonmouths were highly divergent from both eastern and Florida cottonmouths yet the degree of divergence among populations of …
-
Variation in Defensive Behaviors of the Western Cottonmouth (Agkistrodon Piscivorus) as a Result of Temperature, Size, and Reproductive Condition
… response to human antagonists, the cottonmouth (Agkistrodon piscivorus) exhibits a flight response followed by a range of defensive displays which increase with the level of predatory threat. I utilized field and laboratory trials using a three-stage simulated predatory sequence where snakes were …
-
Habituation, Scent-Trailing, and Effects of Temperature Upon the Strike-Induced Chemosensory Searching (SICS) in the Cottonmouth (Agkistrodon Piscivorus)
The effects of ecologically-relevant temperature variation on SICS in the cottonmouth was tested using feeding trials at 14-16°;C, 20-22°;C, and 28-30°;C. At warmer temperatures cottonmouths relocated struck prey sooner, swallowed prey sooner, and tended to release prey more often than snakes at …
-
Impacts of Driving Factors on Annual Cicada Emergence in Relation to the Seasonal Abundance of Eastern Copperheads (Agkistrodon contortrix)
… such predator is the Eastern Copperhead (<italic>Agkistrodon contortrix</italic>) that has been noted feeding on emerging cicadas throughout their range. In eastern Kentucky, observations of copperheads congregating to feed on cicadas has been documented in recreational areas. This creates an …
-
Habitat Use and Spatial Patterns of a Cottonmouth Snake (Agkistrodon Piscivorus Leucostoma) Population and Thermoregulation of Male Cottonmouth Snakes in Southwestern Missouri
Adult male Agkistrodon piscivorus leucostoma were captured and implanted with radio transmitters and Thermochron® i-Buttons as part of a larger radio telemetry study on home range analysis, spatial patterns, habitat use and thermoregulation of cottonmouths in southwestern Missouri. There were …
-
The effects of snake venoms as cytotoxins on selected prostate cancer cell lines
… snake venoms obtained from Naja pallida, Agkistrodon piscivorus conanti and Agkistrodon contortrix laticinctus were evaluated for cytotoxicity and selectivity in vitro against a panel of prostate cancer cell lines (DU145, PC3, LNCaP) and a non-malignant prostate epithelial cell line …
-
Ecology of the Eastern Cottonmouth (<i>Agkistrodon p. piscivorus</i>) at Back Bay National Wildlife Refuge: A Comparative Study of Natural and Anthropogenic Marsh Habitats
… populations of the eastern cottonmouth, <em>Agkistrodon p. piscivorus</em>, in both natural and anthropogenic marsh habitats at Back Bay National Wildlife Refuge (BBNWR), Virginia Beach, Virginia from autumn 1995 to late spring 1998. Mark-recapture subjects were captured, marked by ventral …
-
Food Habits of Snakes in an East Texas State Fish Hatchery
… snake species were Natrix fasciata confluens and Agkistrodon piscivorous leucostorna. From this study it was concluded that snakes did not pose a major fish predation problem. Thus, snake control in this hatchery is not necessary at the present time.</p>
-
Ecology of Upland Snake Communities in Managed Montane Longleaf Pine Habitats of Georgia
… (<em>Coluber constrictor</em>), copperheads (<em>Agkistrodon contortrix</em>), corn snakes (<em>Pantherophis guttatus</em>), Eastern hognose (<em>Heterodon platirhinos</em>), and timber rattlesnakes (<em>Crotalus horridus</em>). Northern pine snake (<em>Pituophis melanoleucus melanoleucus</em>), a …
Page 1 of 2