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 20 of 23 for “"Caudal fin"”.
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Morphology and evolution of caudal fin in lamniform sharks
Sharks have a distinct asymmetrical caudal fin referred to as heterocercal tail that is a key characteristic of the group and has diversified within sharks in ways that are correlated with lifestyle. However, practically no study examining the evolutionary trend and history of the caudal fin …
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Effect of Kinematics and Caudal Fin Properties on Performance of a Freely-Swimming Fin
… on comparing the performance of a free swimming fin over tethered fin both experimentally and numerically. Experimentally, we focus on the oscillatory form of locomotion where the caudal fin pitches to generate necessary thrust as seen in boxfish. We intend to investigate the Caudal fin …
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Hydrodynamics of magnet-coil actuated robotic fish
… magnet-coil actuation method in order to create caudal fin motion. A velocity imaging technique,, Particle Image Velocimetry (PIV), was used in order to characterize the wake structure created by the tail beat. Both robotic fish were towed through water as a high speed camera recorded the …
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Analysis of Multiple Degree-of-freedom Oscillatory Aquatic Propulsion
… was designed and constructed based on the yellowfin tuna (\textit{Thunnus albacares}) that is known to be both fast and efficient. This work extends the current understanding of oscillatory aquatic propulsion to a three-dimensional fish platform with full volume flow field data and propulsive …
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Toward Efficient Bio-Inspired Propulsion: The Effect of Propulsor Shape and Kinematics on System Performance and Efficiency during Bio-inspired Locomotion
… performance and the second was on the effect of caudal fin shape on the performance of thunniform swimmers. For the first study on flight performance, flapping, folding, and twist were the wing motions of interest. The second study on swimming performance observed how caudal fin sweep angle …
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Two races of Etheostoma flabellare flabellare Rafinesque from the Roanoke River of Virginia and the Neuse River of North Carolina
… races of Etheostoma flabellare flabellare Rafinesque, one from the Roanoke River of Virginia and the other from the Neuse River of North Carolina. They are compared in twenty-three characters (scalation, ray counts, and color marks). For eight characters, the Roanoke sample has been divided …
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Genetic and molecular factors regulating growth and morphology in Senegalese sole (Solea senegalensis)
… that affected main body regions (head, body, and caudal fin) and were modulated by sex, the evaluation batch, and amoeba lesions. Symmetric components, that explained 68.8% of total variation and were related to the body's adjustment to an ellipse and caudal fin positioning, showed moderate to …
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Ectoparasites of the southern mullet Liza Richardsonii in the Berg Estuary, South Africa
… a Brachiella species and an unidentified caudal fin parasite. Two representatives of the Monogenea were found, one from the family Microcotylidae and another that was not identified.
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The maintenance of variation in Cyprinodontiformes
… are the guppy (Poecilia reticulata) and the bluefin killifish (Lucania goodei), two freshwater species in the order Cyprinodontiformes with extensive within-population color pattern variation found among males. I use these two species as case studies to examine the evolution and maintenance of …
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Danio rerio (Hamilton, 1822) širdies ir kraujagyslių sistemos vystymosi ir regeneracinių mechanizmų tyrimai /
… blood at 7 days after partial amputation of the caudal fin. This suggested that fli1b might be important for regeneration of vascular system, but it’s role is most likely being compensated by it’s paralog fli1a.
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Studying the mechanisms of cardiovascular development and regeneration in Danio rerio (Hamilton, 1822) /
… blood at 7 days after partial amputation of the caudal fin. This suggested that fli1b might be important for regeneration of vascular system, but it’s role is most likely being compensated by it’s paralog fli1a.
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ELUCIDATING THE ROLE OF MIR-10A/B IN THE WOUND HEALING PROCESS IN LARVAL ZEBRAFISH
… role of microRNA-10 (miR-10) in larval zebrafish caudal fin regeneration, a model with broad implications for the future of regenerative medicine. Building on prior research from the lab, which indicated that miR-10 knockdown impairs regeneration, we verified this finding through rescue …
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Locomotor biomechanics and behaviour in the ocellate river stingray
… long thin tails that have an absent or reduced caudal fin, and anterior to the pelvic girdle the longitudinal body axis is relatively rigid. These characteristics would appear to constrain or preclude many of the locomotor behaviours that are employed by fishes that typically swim via …
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Design and Characterization of Sectored (Patterned) IPMC Actuators for Propulsion and Maneuvering in Bio-Inspired Underwater Systems
… flapping, and complex motions of real fish fins. Not only can the sectored IPMCs be used for actuation, but sections of the composite material can be employed as a sensor, for sensing fin deformation and responses to external stimulation. The result is a compact monolithic control surface …
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Revisão taxonômica e filogenia do gênero Micropoecilia Hubbs (Cyprinodontiformes: Poeciliidae)
… reduced supracleithrum; narrow bones of caudal skeleton; anterior portion of first gonapophisys gently curved ventrally; retrose claw at the tip of ray 5 absent; lanceolated caudal fin of males; males, with more dorsal-fin rays than females and post-umeral mark present. Seven species are …
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Discovering bioactive compounds for bone growth: the osteogenicity of marine organism-derived extracts
… operculum bone growth in juveniles and the other caudal fin regeneration in adults. The operculum system was particularly effective, showing a large number of extracts to significantly increase the degree of bone growth relative to control. Of those extracts tested, red algae were particularly …
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Behaviour and morphology of the zebrafish, danio rerio
… longitudinal melanophore stripes and symmetry of caudal fin pattern may have behavioural roles in this species. Investigations into the shoaling behaviour of the zebrafish revealed no evidence for association preferences for familiar individuals or kin. The ubiquity of a preference for familiars …
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The roles of FGF and Wnt signaling during maxillary barbel regeneration in the Zebrafish (Danio rerio).
… are required for the control of zebrafish caudal fin regeneration; due to the similarities between the fin and the maxillary barbel, these regulatory networks may play a role in barbel regeneration as well. In this study, I explored the roles of FGF and Wnt signaling during barbel …
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Towards an understanding of synthetic glucocorticoid hazards in aquatic systems.
… of cross-species susceptibility, and define mechanisms associated with apical outcomes following exposure in aquatic matrices. First, I performed a critical review of existing literature to characterize the global occurrence of synthetic glucocorticoids in freshwater matrices detected by …
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