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Articles 1 - 12 of 12
Full-Text Articles in Life Sciences
Morning Memory, Dennis Damon
Ghostshipping, Margot A. Kelley
Yesterday's Edges: Land, Sea, Sky, Ellen Goldsmith
Editor's Note, Linda Buckmaster
Depth Preferences Of Sturgeon In Critical Habitat, Elizabeth A. Dunbar
Depth Preferences Of Sturgeon In Critical Habitat, Elizabeth A. Dunbar
Honors College
The depth and vertical movements of Atlantic sturgeon (Acipenser oxyrinchus oxyrinchus) and shortnose sturgeon (Acispenser brevirostrum) at Bucks Ledge (river kilometer 21) in the Penobscot River were examined to investigate sturgeon depth preferences and jumping habits. The purpose of this project was to expand knowledge on the endangered and threatened sturgeon populations in Maine waters. Behavior of 20 individual sturgeon (6 Atlantic sturgeon and 14 shortnose sturgeon) was used to characterize fish depth as it varied with water depth, e.g., in relation to tidal periodicity or not (random). The study used depth data collected using acoustic telemetry between 2007 and …
Collaborative Cnic: Us-Argentina Planning Visits For Fungal Biodiversity Investigation, Laurie B. Connell
Collaborative Cnic: Us-Argentina Planning Visits For Fungal Biodiversity Investigation, Laurie B. Connell
University of Maine Office of Research Administration: Grant Reports
This collaborative project aims to catalyze a research collaboration between US and Argentinian researchers. The project will be led by Drs. Russell Rodriguez at Symbiogenics and Regina Redman of the University of Washington, both in Seattle, Washington, and Dr. Laurie Connell at the University of Maine, Orono, for the US side. On the Argentinean side, Drs. Diego Libkind, Martin Molino and Virginia de Garcia of INIBIOMA (Instituto de Investigaciones en Biodiversidad y Medioambiente, an Argentinean National Scientific and Technical Research Council Institute) and the University of Comahue, are the counterparts for the project. The Argentinian researchers bring to the collaboration …
Understanding Social Resilience In The Maine Lobster Industry, Teresa R. Johnson, Anna M. Henry
Understanding Social Resilience In The Maine Lobster Industry, Teresa R. Johnson, Anna M. Henry
Publications
The Maine lobster Homarus americanus fishery is considered one of the most successful fisheries in the world due in part to its unique comanagement system, the conservation ethic of the harvesters, and the ability of the industry to respond to crises and solve collective-action problems. However, recent threats raise the question whether the industry will be able to respond to future threats as successfully as it has to ones in the past or whether it is now less resilient and can no longer adequately respond to threats. Through ethnographic research and oral histories with fishermen, we examined the current level …
The Effect Of Temperature On Paralytic Shellfish Toxin Uptake By Blue Mussels (Mytilus Edulis) And Sea Scallops (Placopecten Magellanicus), Mackenzie Mazur
The Effect Of Temperature On Paralytic Shellfish Toxin Uptake By Blue Mussels (Mytilus Edulis) And Sea Scallops (Placopecten Magellanicus), Mackenzie Mazur
Honors College
Increasing amounts of paralytic shellfish toxins (PSTs) threaten human health, the economy, and marine ecosystems because of paralytic shellfish poisoning (PSP). Therefore, studies about shellfish toxicity can have significant public health and social impact. In this study, the effect of water temperature on PST uptake in blue mussels (Mytilus edulis) and sea scallops (Placopecten magellanicus) was tested. Mytilus edulis and P. magellanicus were acclimated to either 10°C or 15°C for two weeks before being fed with the toxic alga, Alexandrium fundyense, at a concentration of 100 cells/mL and a non-toxic algae source (Shellfish Diet) at a concentration of 2.4 X …
Urbanization Changes The Composition And Bioavailability Of Dissolved Organic Matter In Headwater Streams, Thomas B. Parr, Christopher Cronan, Tsutomu Ohno, Stuart Findlay, Sean Smith, Kevin Simon
Urbanization Changes The Composition And Bioavailability Of Dissolved Organic Matter In Headwater Streams, Thomas B. Parr, Christopher Cronan, Tsutomu Ohno, Stuart Findlay, Sean Smith, Kevin Simon
Publications
Population growth in cities has resulted in the rapid expansion of urbanized land. Most research and management of stream ecosystems affected by urban expansion has focused on the maintenance and restoration of biotic communities rather than their basal resources. We examined the potential for urbanization to induce bottom-up ecosystem effects by looking at its influence on dissolved organic matter (DOM) composition and bioavailability and microbial enzyme activity. We selected 113 headwater streams across a gradient of urbanization in central and southern Maine and used elemental and optical analyses, including parallel factor analysis of excitation-emission matrices, to characterize DOM composition. Results …
The Influence Of Sediment Characteristics On The Burrowing Behavior Of Juvenile Razor Clams, Ensis Directus, Robert Joseph Hallinan
The Influence Of Sediment Characteristics On The Burrowing Behavior Of Juvenile Razor Clams, Ensis Directus, Robert Joseph Hallinan
Honors College
Ensis directus, or the Atlantic razor clam, is an infaunal bivalve species whose geographic range extends along the Atlantic coast of North America, from Canada to South Carolina. In this study, I examined the burrowing behavior of large juvenile razor clams (shell length: 60-78 mm) in two sediment types: fine mud sediment and coarse sand sediment. I categorized the burrowing behavior into four independent phases: recovery, exploration, initiation, and tunneling and recorded the proportion and time of completion of each stage of burrowing. With each clam having been exposed to both sediment types, more razor clams burrowed in the fine …