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 70 for “"chemical cues"”.
-
Daphnia Diel Vertical Migration and Chemical Cues from Fish Predators
… Daphnia behavioral responses to light and fish chemical cues were examined through experiments in an apparatus containing four acrylic tubes (100cm x 4.5cm). Passing ice-water through coils wrapped around the tubes created a distinct thermocline (6.3-20.5°;C) in the tubes. There was no …
-
Experience With Chemical Cues Influences Subsequent Behavior of Rainbow Darters, Etheostoma Caeruleum
… to red predator models and to either an alarm chemical (unconditioned fright stimulus) or blank water (control), and then subsequently tested the responses of the darters (number of hops) to the models (either red or blue) alone. The results of the study are ambiguous with respect to learning …
-
Sexual Dimorphism and Behavioral Responses to Conspecific Chemical Cues in Pagurus samuelis
… to display meral spread when sensing conspecific cues. Both sexes displayed no difference in the amount of time spent stationary with head-extended across all cue treatment waters. Both sexes tended to walk more in the presence of agonistic cue waters.
-
Identification of Sex and Parasitism via Chemical Cues by the Ozark Zigzag Salamander
Chemical communication is the primary mode of information transfer among woodland salamanders of the genus Plethodon. These cues have been shown to convey a wide variety of information, and are used to establish territorial boundaries. Responses to chemical cues can include changes in both behavior …
-
Environmental sensing and response of conserved RNA-processing machines to specific external chemical cues
… recognition and/or the ability for other chemical substrates to influence their activity. The research presented herein describes features of two highly relevant models to investigate substrate specificity and/or interactions with regulatory molecules: polynucleotide phosphorylase and the …
-
Effect of Physical and Chemical Cues on Candida albicans Morphological Expression and Biofilm Formation
… estimated to be $35-45 billion. Physical and chemical surface modification techniques are thought to be critical in the fight against biofilm formation within medical settings. Nanoscale structural features have been found to have significant effects on bacterial adhesion and biofilm …
-
Effects of Prior Exposure to Predatory Chemical Cues on Territorial and Foraging Behaviors of the Ozark Zigzag Salamander, Plethodon Angusticlavius
Detection of chemical cues is important for avoidance of predation for many prey animals. Previous experiments have shown that Ozark zigzag salamanders (Plethodon angusticlavius) make behavioral changes when in direct contact with predatory chemical cues. I predicted that prior exposure to a …
-
The utilization of chemical communication by three species of ghost shrimp, Callichirus islagrande, Callichirus major, and Lepidophthalmus louisianensis, and the transport of chemical cues within and between burrows
… of the factors affecting the potential use of chemical cues by three species of infaunal shrimp was performed in three parts. A set of modified y-maze choice experiments were performed to establish the ability of three species of ghost shrimp, Callichirus islangrande, Callichirus major, and …
-
The Influence of Tail Autotomy on Avoidance of Chemical Alarm Cues in Northern Zigzag Salamanders, Plethodon dorsalis
… may use predator avoidance. Salamanders detect chemical alarm cues via the vomeronasal organ and their avoidance of the chemical cues is based upon the apparent associated risk. The objective of this study was to better understand predator avoidance by means of chemical alarm cues in northern …
-
The vomeronasal organ of the skink, Scincella lateralis: the morphology and role in predation
… Scincella lateralis responds to both visual and chemical cues of prey. A visual stimulus is associated with an increased rate of tongue flicking, orientation to the prey, and attack behavior. Chemical cues are unimportant when the visual cue (movement) is present. When prey are non-moving or …
-
Behavioral Responses By Cottonmouths (Agkistrodon Piscivorus) To Chemical And Visual Predator Cues
… threats can vary with different stimuli. Chemical cues are important for predator recognition but visual cues may elicit defensive responses. Cottonmouths (Agkistrodon piscivorus) exhibit an array of antipredatory behaviors that have been thoroughly characterized in response to human …
-
Chemical and Behavioral Ecology of the Coastal Giant Salamander (Dicamptodon tenebrosus)
… study, I observed the first evidence for the use chemical cues by terrestrial <em>D. tenerosus</em> in regards to shelter selection. I also observed the first accounts of agonistic and display behavior of terrestrial <em>D. tenebrosus</em>. These results suggest that terrestrial <em>D. tenebrosus …
-
Nest Emergence and Chemosensory Mediated Predator Avoidance: Two Studies of Behavior in the Red-Eared Slider (Trachemys Scripta Elegans)
… of naïve hatchling red-eared sliders to the chemical cues of predator (Macroclemmys temminckii) and a non-predatory heterospecfic (Sternotherus oderatus) was tested. The hatchlings showed preferential avoidance of areas with the predatory scent and indifference to areas with the non-predatory …
-
Piezo1-dependent mechanical regulation of chemical signalling in the developing Xenopus laevis brain
… by various chemo-mechanical signals. Major chemical signals include semaphorins, slits, netrins and ephrins/Eph, whereas mechanical signals include tissue stiffness, viscosity and cellular forces. In the developing embryo, chemical and mechanical signals are not isolated. However, how cells …
-
Quantifying Metagonimoides oregonensis infection distribution and effects among stream salamander hosts
… I examined both parasite response to host chemical cues and host response to parasite presence and chemical cues. I did not see a behavioral response by either the parasite or the host, indicating behavior is probably less important in determining variable infection among hosts in this …
-
Impacts of the Spotted Spiny Lobster (<i>Panulirus guttatus</i>) on the Long-Spined Sea Urchin (<i>Diadema antillarum</i>) and Patch Reef Communities in the Florida Keys
… predator. <em>Panulirus guttatus </em>cues also mitigated the importance of intra-specific competition for shelter by <em>Diadema</em>, with <em>Diadema</em> selecting shelters with conspecific chemical cues over those with<em> P. guttatus </em>chemical cues. Through its negative impact …
-
Rapid 3-D laser microprinting of bioscaffolds and patterning of proteins
… contain both exquisite microarchitectures and chemical cues to support cell migration, proliferation and differentiation. The majority of tissue engineering strategies use porous scaffolds containing chemical cues for culturing cells. However, these methods are unable to truly recapitulate the …
-
Biogeographic Patterns, Predator Identity, and Chemical Signals Influence the Occurrence and Magnitude of Non-lethal Predator Effects
… conditions that influence the transmission of cues indicative of predation risk. In this dissertation I investigate factors that influence how a single prey species evaluates and responds to predation risk. Here, I examined: 1) the type and nature of cues prey use to evaluate predator risk; 2) …
-
Behavioral and Metabolic Responses of Juvenile Spotted Salamanders (Ambystoma Maculatum) to Alarm Cues from Damaged Skin and Predator Diet
… maculatum, to assess predation risk via chemical alarm cues and substrate markings from predators fed different diets. In the alarm-cue experiment, salamanders avoided substrates marked with alarm cues but not from noninjured conspecifics or alarm stimuli from heterospecifics. Snakes that …
Page 1 of 4