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Articles 1 - 14 of 14
Full-Text Articles in Population Biology
Dataset For: “Shifts In Habitat, Habitat Use, And Demography Of American Lobsters In Coastal Maine Over The Past Quarter Century.”, Robert Jarrett Ii, Damian Brady, Richard Wahle, Robert Steneck
Dataset For: “Shifts In Habitat, Habitat Use, And Demography Of American Lobsters In Coastal Maine Over The Past Quarter Century.”, Robert Jarrett Ii, Damian Brady, Richard Wahle, Robert Steneck
Non-Thesis Student Work
This is the dataset for the manuscript "Shifts in habitat, habitat use, and demography of American lobsters in coastal Maine over the past quarter century." Our study revisited 20 long-term monitored sites at 10 m depth along more than 320 km of the Gulf of Maine. Sampling used quadrat sampling via scuba divers. We recorded fundamental changes in lobster habitat use and distribution. The data include count, size, sex, number of claws, and shelter use of lobster in addition to substrate type, percent cover of kelp and other macroalgae. The data are included in six .csv format files: (1) data …
Confirmed Presence Of Parahepatospora Carcini In Carcinus Maenas Population Of Maine, Brittany Torchia
Confirmed Presence Of Parahepatospora Carcini In Carcinus Maenas Population Of Maine, Brittany Torchia
Honors College
Carcinus maenas (European green crab) is an invasive species that made its way to North American waters in the 1800s on European trading ships. As an invasive species they cause problems by competing with native species for the resources within their shared ecosystem. They can also introduce pathogens that can infect and wreak havoc on native populations. In Nova Scotia, Bojko et al. (2017) found the pathogen Parahepatospora carcini, a clade IV microsporidian parasite found in the hepatopancreas of aquatic arthropods, in C. maenas. Because this case was located within close range of Maine waters, the objective of this study …
Land Cover Composition, But Not Weather, Affects Female Wild Turkey Roost Site Selection, Kaj Overturf
Land Cover Composition, But Not Weather, Affects Female Wild Turkey Roost Site Selection, Kaj Overturf
Honors College
Populations at a species’ northern range extent are often presented with more challenges than those in more southern regions, given that winters are generally harsher, and the reproductive season is shorter in these northern regions. Wild turkeys (Meleagris gallopavo) are near their northern range limit in Maine, and there have been no studies that have researched turkey roosting here. Wild turkeys roost in trees at night, and we predicted that roost selection would be affected by changing weather conditions, particularly during winter when temperatures are expected to be coldest. We also predicted that land cover composition would affect …
Rapid: Ecological Resistance Of Multiply Stressed Populations: The Response Of Tidal Marsh Birds And Plants To Hurricane Sandy, Brian J. Olsen, Chris S. Elphick, Greg Shriver
Rapid: Ecological Resistance Of Multiply Stressed Populations: The Response Of Tidal Marsh Birds And Plants To Hurricane Sandy, Brian J. Olsen, Chris S. Elphick, Greg Shriver
University of Maine Office of Research Administration: Grant Reports
All animal and plant populations can weather change. However, the amount of environmental change a population can absorb is likely to depend upon other, past and ongoing stresses that the population experiences. This project will test whether the ability of populations of native plants and animals in coastal marshes to withstand the recent, extreme storm Hurricane Sandy was greater or less in marshes more subject to past stresses. Researchers will compare the abundances of marsh plants and animals before and after the storm and test whether vulnerability was greater in more specialized species or in marshes surrounded by development, invaded …
Population Ecology And Epidemiology Of Sea Lice In Canadian Waters, Sonja M. Saksida, Ian Bricknell, Shawn M. C. Robinson, Simon Jones
Population Ecology And Epidemiology Of Sea Lice In Canadian Waters, Sonja M. Saksida, Ian Bricknell, Shawn M. C. Robinson, Simon Jones
Maine Sea Grant Publications
Sea lice are found on farmed and wild fish on both the west coast and east coast of Canada. The predominant species on both coasts is referred to as Lepeophtheirus salmonis but indications are that the two groups are genetically different. Caligus species are also found on both coasts, these too are different species: Caligus clemensi and C. elongatus, respectively. There has been extensive work on sea lice on both wild and farmed fish over the last decade. Research indicates that L. salmonis, commonly referred to as the salmon louse; may have a broader host range than commonly …
The American Lobster Settlement Index: An Early Warning System?, Maine Sea Grant College Program
The American Lobster Settlement Index: An Early Warning System?, Maine Sea Grant College Program
Maine Sea Grant Publications
The harvest of American lobsters is the Gulf of Maine’s largest, most valuable, and most iconic fishery. The catch has never been higher, but how long will it last? Fishing communities in eastern Maine and southern Nova Scotia are seeing historically high landings, some five times higher than the 1980s. At the same time, the lobster fishery south of Cape Cod has all but collapsed, plagued by shell disease and stressfully warm summers. It has never been more important to monitor this vital fishery. The American Lobster Settlement Index measures the annual pulse of baby lobsters to rocky nurseries some …
Collaborative Research: Land-Use Practices And Persistence Of Amphibian Populations, Malcolm L. Hunter Jr.
Collaborative Research: Land-Use Practices And Persistence Of Amphibian Populations, Malcolm L. Hunter Jr.
University of Maine Office of Research Administration: Grant Reports
Over the past 200 years, conversion of land for agricultural use, industrial development, and urban sprawl has drastically reduced natural habitat for many species and is considered the most serious threat to biological diversity. Fragmentation divides once continuous natural habitats into smaller pieces that are often separated by areas unsuitable to sustain viable populations. The goal of the proposed research is to understand how important local population and metapopulation processes are altered by fragmentation of natural habitats in a model system of pond-breeding amphibians. The primary objectives of the proposed study are to experimentally compare demographic and behavioral responses of …
Collaborative Research: Land-Use Practices And Persistence Of Amphibian Populations., Malcolm L. Hunter Jr.
Collaborative Research: Land-Use Practices And Persistence Of Amphibian Populations., Malcolm L. Hunter Jr.
University of Maine Office of Research Administration: Grant Reports
Over the past 200 years, conversion of land for agricultural use, industrial development, and urban sprawl has drastically reduced natural habitat for many species and is considered the most serious threat to biological diversity. Fragmentation divides once continuous natural habitats into smaller pieces that are often separated by areas unsuitable to sustain viable populations. The goal of the proposed research is to understand how important local population and metapopulation processes are altered by fragmentation of natural habitats in a model system of pond-breeding amphibians. The primary objectives of the proposed study are to experimentally compare demographic and behavioral responses of …
Diet And Prey Availability Of Sturgeons In The Penobscot River, Maine, Matthew Dzaugis
Diet And Prey Availability Of Sturgeons In The Penobscot River, Maine, Matthew Dzaugis
Honors College
Although vital to the protection and conservation of species listed under the U.S. Endangered Species Act, critical habitat of shortnose sturgeon and Atlantic sturgeon in the Penobscot River, Maine have not yet been described. Critical habitat includes food availability as well as the physical characteristics of foraging habitat. To characterize seasonal availability of benthic prey, a ponar grab was used to collect over 125 benthic samples between 21 May and 8 October 2012. Samples were stratified throughout the river and broadly categorized by sediment type. All organisms within samples were identified to the family level. To characterize diet, stomach contents …
Dissertation Research: Eco-Evolutionary Effects Of An Aquatic Consumer: Linking Phenotypic Diversity To Community And Ecosystem Responses, Kevin S. Simon, Quenton Tuckett, Michael T. Kinnison
Dissertation Research: Eco-Evolutionary Effects Of An Aquatic Consumer: Linking Phenotypic Diversity To Community And Ecosystem Responses, Kevin S. Simon, Quenton Tuckett, Michael T. Kinnison
University of Maine Office of Research Administration: Grant Reports
This research addresses the interaction between ecological and evolutionary processes by examining the recent evolution of a common invasive fish species, the white perch, in lakes and the consequences of this evolution for community and ecosystem dynamics. White perch have successfully invaded lakes spanning a productivity gradient, which provides diverse selective pressures that may result in altered fish morphology, physiology and ecological role. Adaptation by these fish may, in turn, feed back to affect lake productivity and community structure through several ecological and chemical pathways. This project tests the hypothesis that this rapid evolutionary divergence within a single species has …
Collaborative Research: Extreme Discordance Between Allozyme And Non-Allozyme Introgression In Baltic Mussels. Selection On Allozymes?, Paul D. Rawson
Collaborative Research: Extreme Discordance Between Allozyme And Non-Allozyme Introgression In Baltic Mussels. Selection On Allozymes?, Paul D. Rawson
University of Maine Office of Research Administration: Grant Reports
A major challenge for evolutionary biologists is to determine the degree to which natural selection shapes genetic variation in natural populations. Hybridization is common between two species of blue mussel found in the North and Baltic Seas. The differential exchange of genes between the two mussel species, particularly genes encoding enzymes involved in central metabolic pathways, suggests those genes may be under selection and involved in adaptation to low salinity conditions in the Baltic Sea. Tests for selection will be conducted by comparing levels of genetic exchange for these metabolic genes against nonmetabolic and presumably neutral (i.e., not under selection) …
Collaborative Research: Toward Environmental Genomics: Can We Estimate Bacterial Diversity In The Ocean?, Daniel L. Distel
Collaborative Research: Toward Environmental Genomics: Can We Estimate Bacterial Diversity In The Ocean?, Daniel L. Distel
University of Maine Office of Research Administration: Grant Reports
Environmental genomics, wherein the total genomic diversity of a natural community may be sampled and analyzed in an ecological context, remains an elusive goal. This is due, at least in part, to (I) a lack of reliable estimates of total community diversity and (II) a lack of information regarding the exact phylogenetic, genomic and ecological units measured by commonly used diversity estimators. Although ribosomal RNA approaches have provided the first steps towards diversity estimation, and are widely used as a proxy for unique bacterial types in natural populations, the genomic unit a ribotype measures remains largely unexplored. It is generally …
1976 Deer Wintering Survey Of The St. John River-Dickey-Lincoln Project Area, Alan Hutchinson
1976 Deer Wintering Survey Of The St. John River-Dickey-Lincoln Project Area, Alan Hutchinson
Dickey-Lincoln School Lakes Project
As a result of renewed interest and funding for the Dickey-Lincoln Hydro-electric project, this study was initiated to update information on deer wintering habitat in the section of the St. John River Valley affected by the proposed impoundment. In particular, this project was aimed at determining the acreage of deer wintering habitat that would be directly lost due to the impoundment. In addition, the distribution of deer wintering habitat in the surrounding area was evaluated to give a regional perspective.
Logbook, U.S.S. Gannet, 1912-1913, George W. Greenleaf, United States Bureau Of Fisheries
Logbook, U.S.S. Gannet, 1912-1913, George W. Greenleaf, United States Bureau Of Fisheries
History of Maine Fisheries
Logbook of the U.S.S. Gannet, a research steam vessel commanded by Captain George W. Greenleaf for the United States Bureau of Fisheries hatchery located on McKown Point in Boothbay Harbor (Me.). The vessel was used by the hatchery in its efforts to preserve and increase fish stocks, including cod, haddock, polluck, flounder and lobsters. Records daily activities along the coast, including the number of seeders and eggs harvested and/or released, water temperatures, weather, and general maintenance of the vessel.