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The Adaptive Capacity Of Thermal Tolerance In Chinook Salmon, Nicolas Muñoz
The Adaptive Capacity Of Thermal Tolerance In Chinook Salmon, Nicolas Muñoz
Electronic Thesis and Dissertation Repository
With global temperatures projected to surpass the limits of thermal tolerance for many species, evaluating the capacity for evolutionary and phenotypically plastic changes in thermal tolerance is key to our understanding of the biological consequences of climate change. Within quantitative genetic breeding designs and multiple rearing environments, I measured the thermal performance of cardiac function among families of two populations of chinook salmon (Oncorhynchus tshawytscha). I found significant indirect genetic, plastic, and additive genetic effects contributing to cardiac performance and thermal tolerance, representing a variety of adaptive mechanisms available to salmon populations faced with climate change. These results …
When Faces "Feel" Familiar: The Role Of Affective Signals In Face Recognition, Lauren E. Dunphy
When Faces "Feel" Familiar: The Role Of Affective Signals In Face Recognition, Lauren E. Dunphy
Electronic Thesis and Dissertation Repository
Previous research has suggested that there may be an increase in positive affect and autonomic arousal in response to seeing a familiar face. These studies rarely distinguish between faces for which there is only a “feeling” of familiarity, and faces for which this feeling is accompanied by the retrieval of semantic knowledge about the individual. In the current study we aimed to make that distinction. Participants made recognition judgments on famous and non-famous faces while galvanic skin responses (GSR), zygomatic muscle activity, and heart rate (HR) were recorded. We found increases in GSR (autonomic arousal), and zygomatic muscle activity (positive …