283 research outputs found

    MP763: Without Benefit of Insects: The Story of Edith M. Patch of the University of Maine

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    A biography of noted entomologist Edith M. Patch, focusing on her time and research at the University of Mainehttps://digitalcommons.library.umaine.edu/aes_miscpubs/1037/thumbnail.jp

    TB142: Mayflies of Maine: An Annotated Faunal List

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    The purpose of this study is to determine the composition and distribution of the mayfly fauna and to reference all pertinent taxonomic, ecologic, and biologic data.https://digitalcommons.library.umaine.edu/aes_techbulletin/1200/thumbnail.jp

    TB100: The Aquatic Insects of the Narraguagus River, Hancock and Washington Counties, Maine

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    This technical bulletin presents an inventory of the aquatic insects of the Narraguagus River in Hancock and Washington counties, Maine. The list is arranged phylogenetically by order and alphabetically within each orderhttps://digitalcommons.library.umaine.edu/aes_techbulletin/1084/thumbnail.jp

    TB92: The Aquatic Insects of the St. John River Drainage of Aroostook County, Maine

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    In September, 1977, an aquatic insect survey of the St. John River drainage was conducted. The objectives were to provide information on the existing fauna in the area of the proposed Dickey-Lincoln School Lakes hydro-electric project and to form the basis for predicting changes in the fauna should implementation of the proposed project take place. The results of that survey form the basis for this bulletin. The only additional information on the fauna of this river comes from a survey of organisms in the gut content of brook trout taken from the St. John River drainage between the Little Black River and Fort Kent during 1975-1976.https://digitalcommons.library.umaine.edu/aes_techbulletin/1099/thumbnail.jp

    TB123: Experimental Application of B.t.i. for Larval Black Fly Control: Persistance and Downstream Carry, Efficacy, Impact on Non-target Invertebrates and Fish Feeding

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    In the summer of 1985 a field experiment was conducted in the Sugarloaf area of Maine on the use of B.t.i. to reduce the numbers of black fly larvae in the Carrabassett River and a tributary stream. The objectives were to determine the rate of application necessary to produce an acceptable reduction in black fly larvae, to study the fate and persistence of B.t.i. in a stream following application, to determine the impact of B.t.i. on the abundance and drift of non-target stream insects and on the feeding success and diet composition of fishes in the treated streams.https://digitalcommons.library.umaine.edu/aes_techbulletin/1083/thumbnail.jp

    TB133: Experimental Stream Application of B.t.i. for Human Nuisance Black Fly Management in a Recreational Area

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    Biting and swarming black flies are abundant in Maine and can cause serious discomfort to humans, especially in recreational areas where their presence may substantially decrease satisfaction in outdoor activities. In 1985, 1986 and 1987 a series of experimental applications of B.t.i. was made on property owned by the Sugarloaf Mountain Corporation. The 198 5 study determined the persistenc e o f B.t.i. in stream and river water and the concentration necessary to achieve \u3e90% mortality in black fly larvae. It also indicated that B.t.i. had no detectable impact on non-target organisms. In 1986 and 1987 the objective was to determine if controlling the black fly larvae in streams within the Sugarloaf property would result in decreasing adult human nuisance flies to an acceptable level.https://digitalcommons.library.umaine.edu/aes_techbulletin/1069/thumbnail.jp

    Effects of Timber Harvest on Amphibian Populations: Understanding Mechanisms from Forest Experiments

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    Accompanying appendix may be accessed at: http://hdl.handle.net/10355/1365Harvesting timber is a common form of land use that has the potential to cause declines in amphibian populations. It is essential to understand the behavior and fate of individuals and the resulting consequences for vital rates (birth, death, immigration, emigration) under different forest management conditions.We report on experimental studies conducted in three regions of the United States to identify mechanisms of responses by pond-breeding amphibians to timber harvest treatments. Our studies demonstrate that life stages related to oviposition and larval performance in the aquatic stage are sometimes affected positively by clearcutting, whereas effects on juvenile and adult terrestrial stages are mostly negative

    Planning for Sustainability in Small Municipalities: The Influence of Interest Groups, Growth Patterns, and Institutional Characteristics

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    How and why small municipalities promote sustainability through planning efforts is poorly understood. We analyzed ordinances in 451 Maine municipalities and tested theories of policy adoption using regression analysis.We found that smaller communities do adopt programs that contribute to sustainability relevant to their scale and context. In line with the political market theory, we found that municipalities with strong environmental interests, higher growth, and more formal governments were more likely to adopt these policies. Consideration of context and capacity in planning for sustainability will help planners better identify and benefit from collaboration, training, and outreach opportunities

    Serotonin and corticosterone rhythms in mice exposed to cigarette smoke and in patients with COPD:implication for COPD-associated neuropathogenesis

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    The circadian timing system controls daily rhythms of physiology and behavior, and disruption of clock function can trigger stressful life events. Daily exposure to cigarette smoke (CS) can lead to alteration in diverse biological and physiological processes. Smoking is associated with mood disorders, including depression and anxiety. Patients with chronic obstructive pulmonary disease (COPD) have abnormal circadian rhythms, reflected by daily changes in respiratory symptoms and lung function. Corticosterone (CORT) is an adrenal steroid that plays a considerable role in stress and anti-inflammatory responses. Serotonin (5-hydroxytryptamine; 5HT) is a neurohormone, which plays a role in sleep/wake regulation and affective disorders. Secretion of stress hormones (CORT and 5HT) is under the control of the circadian clock in the suprachiasmatic nucleus. Since smoking is a contributing factor in the development of COPD, we hypothesize that CS can affect circadian rhythms of CORT and 5HT secretion leading to sleep and mood disorders in smokers and patients with COPD. We measured the daily rhythms of plasma CORT and 5HT in mice following acute (3 d), sub-chronic (10 d) or chronic (6 mo) CS exposure and in plasma from non-smokers, smokers and patients with COPD. Acute and chronic CS exposure affected both the timing (peak phase) and amplitude of the daily rhythm of plasma CORT and 5HT in mice. Acute CS appeared to have subtle time-dependent effects on CORT levels but more pronounced effects on 5HT. As compared with CORT, plasma 5HT was slightly elevated in smokers but was reduced in patients with COPD. Thus, the effects of CS on plasma 5HT were consistent between mice and patients with COPD. Together, these data reveal a significant impact of CS exposure on rhythms of stress hormone secretion and subsequent detrimental effects on cognitive function, depression-like behavior, mood/anxiety and sleep quality in smokers and patients with COPD
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