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Full-Text Articles in Life Sciences
Effect Of Social Status On The Behavior And Neurophysiology Of Crayfish, Fadi Aziz Issa
Effect Of Social Status On The Behavior And Neurophysiology Of Crayfish, Fadi Aziz Issa
Biology Dissertations
Adaptation to changing social conditions is important for many social animals. Here, the effects of social experience on the behavior and neurophysiology of the red swamp crayfish, Procambarus clarkii, were studied. Evidence is presented that shows juvenile crayfish interact and form social order, and their behavior patterns shift in accordance to social status. Dominant animals maintain a high level of aggressive behavior, while subordinates shift their behavior pattern from aggressive to submissive behavior. Adult male crayfish show similar behavior pattern during dominance formation. However, this work demonstrates that male crayfish adopt a unique strategy to signify the formation of a …
Assessment Of A Non-Invasive High-Throughput Classifier For Behaviours Associated With Sleep And Wake In Mice, Kevin D. Donohue, Dharshan C. Medonza, Eli R. Crane, Bruce F. O'Hara
Assessment Of A Non-Invasive High-Throughput Classifier For Behaviours Associated With Sleep And Wake In Mice, Kevin D. Donohue, Dharshan C. Medonza, Eli R. Crane, Bruce F. O'Hara
Biology Faculty Publications
This work presents a non-invasive high-throughput system for automatically detecting characteristic behaviours in mice over extended periods of time, useful for phenotyping experiments. The system classifies time intervals on the order of 2 to 4 seconds as corresponding to motions consistent with either active wake or inactivity associated with sleep. A single Polyvinylidine Difluoride (PVDF) sensor on the cage floor generates signals from motion resulting in pressure. This paper develops a linear classifier based on robust features extracted from normalized power spectra and autocorrelation functions, as well as novel features from the collapsed average (autocorrelation of complex spectrum), which characterize …
Use Of Phylogenetic Stains To Determine The Feeding Preferences Of Microbivorous Soil Nematodes, E. Harlan Michelle
Use Of Phylogenetic Stains To Determine The Feeding Preferences Of Microbivorous Soil Nematodes, E. Harlan Michelle
Honors Theses
Due to their numerous and diverse roles in soil ecological processes – most notably decomposition and nutrient mineralization – nematodes have long been recognized as important biotic indicators of soil health (Ekschmitt et al., 2001; Ritz and Trudgill, 1999). The predominate means of assessing the information that these organisms might contain has been through nematode community analyses, a methodology that seeks to convert the vast amount of data regarding features such as diversity, maturity and richness into a series of indices which can be used to evaluate soil health and make comparisons across samples. Performance of these analyses typically involves …
Movement Patterns And Feeding Behavior Of The Limpet Tectura Testudinalis (Müller) Along The Mid-Maine Coast, Joshua Lord
Movement Patterns And Feeding Behavior Of The Limpet Tectura Testudinalis (Müller) Along The Mid-Maine Coast, Joshua Lord
Honors Theses
Tectura testudinalis is a limpet that lives in the mid-intertidal zone along the coast of Maine and grazes on a variety of encrusting algae. A previous study asserted that T. testudinalis preferred to feed and rest on the encrusting alga Clathromorphum circumscriptum and that this species of limpet displayed homing behavior. However, I show that T. testudinalis does not home or return to any specific substrate while resting. Conclusive evidence was found for nocturnal movement. I show that C. circumscriptum was the preferred food source for this limpet, closely followed by Hildenbrandia rubra, another encrusting alga. Field and lab experiments …