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Full-Text Articles in Life Sciences
Effects Of An Increasing Harbor Seal Population On Changes In Sites Used For Pupping, Nikolina Guldager
Effects Of An Increasing Harbor Seal Population On Changes In Sites Used For Pupping, Nikolina Guldager
Electronic Theses and Dissertations
Aerial survey data from 198 1 to 1997 of an increasing harbor seal (Phoca vitulina concolor) population in Penobscot and Blue Hill bays, Maine, were used to evaluate spatial and temporal patterns of use of pupping sites by mother-pup pairs. Pupping sites refer to haul-out sites where pups were observed during surveys, and are assumed to be used consistently from birth to weaning. Sites with pups were spatially clustered to remove spatial auto-correlation, reduce temporal variability and provide biologically cohesive and independent sample units. Spatial, temporal and habitat analyses were completed for 2 spatial scales: individual sites and …
Thermal Adaptation Of Polar Macroalgae, Ian R. Davison
Thermal Adaptation Of Polar Macroalgae, Ian R. Davison
University of Maine Office of Research Administration: Grant Reports
Davison 9418033 The genetic adaptations that enable certain plant species to survive and grow in polar environments where temperatures are near or below 0oC year-round are poorly understood. Low- temperature adaptation is complicated in terrestrial plants by freezing, desiccation and stomatal conductance, and in marine phytoplankton by a variable and unpredictable physical environment. Polar macroalgae provide an experimental system that is not subject to these complications and that is well- suited to the study of cold-adaptation in plants. Cold- adaptation is particularly well developed in Antarctic macroalgae, in which rates of photosynthesis and growth at OoC are comparable to rates …
Emersion Stress In Intertidal Seaweeds: Role Of Active Oxygen, Ian R. Davison
Emersion Stress In Intertidal Seaweeds: Role Of Active Oxygen, Ian R. Davison
University of Maine Office of Research Administration: Grant Reports
The study will examine stress-tolerance in two major groups of perennial intertidal macroalgae, the red and brown seaweeds. The research will test the hypothesis that active oxygen is involved in emersion stress of intertidal seaweeds. Damage due to active oxygen will be determined in stress-tolerant and stress- susceptible species exposed to emersion stress by measuring the peroxidation of membrane lipids. Plants will be grown in laboratory culture under conditions that increase their ability to withstand emersion stress. If the research hypothesis is correct, increases in stress tolerance should be associated with increased levels of antioxidants and/or protective enzymes. The proposed …
School Of Marine Sciences / Darling Marine Center, Kevin J. Eckelbarger
School Of Marine Sciences / Darling Marine Center, Kevin J. Eckelbarger
University of Maine Office of Research Administration: Grant Reports
Over the last six years, the University of Maine has made an unprecedented investment in its marine laboratory, the Darling Marine Center to benefit both University faculty and visiting researchers and their students. Facility improvements include many new laboratory and offices spaces, more research instrumentation, and basic support facilities such as a dining hall and new classrooms. The inauguration of a Visiting Investigation Program in 1991, the expansion of educational offerings, and the growth of a large undergraduate internship program, have resulted in a population explosion that shows no sign of abating. To set priorities for improvements, the University has …