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Articles 1 - 9 of 9
Full-Text Articles in Population Biology
Forest Disturbance And Occupancy Patterns Of Carnivores: Results Of A Large-Scale Field Study In Maine, Usa, Bryn E. Evans
Forest Disturbance And Occupancy Patterns Of Carnivores: Results Of A Large-Scale Field Study In Maine, Usa, Bryn E. Evans
Electronic Theses and Dissertations
Understanding trends in the abundance and distribution of carnivores is important at global, regional and local scales due to their ecological role, their aesthetic and economic value, and the numerous threats to their populations. Carnivores in Maine range from the American black bear (Ursus americanus), to numerous native mesocarnivore species, such as American marten (Martes americana), fisher (Pekania pennanti), coyote (Canis latrans), red fox (Vulpes vulpes), bobcat (Lynx rufus), Canada lynx (Lynx canadensis) and to two small weasel species (Mustela erminea and Neogale frenata). …
Improving Conservation Of Declining Young Forest Birds Through Adaptive Management, Anna Buckardt Thomas
Improving Conservation Of Declining Young Forest Birds Through Adaptive Management, Anna Buckardt Thomas
Electronic Theses and Dissertations
Early successional forest and shrubland habitats are collectively called young forest. Changes in disturbance regimes and land use conversion resulted in declines of young forest and associated wildlife across eastern North America. Conservation of declining young forest birds relies on the maintenance and creation of young forest habitats used for breeding. American Woodcock (AMWO; Scolopax minor) and Golden-winged Warbler (GWWA; Vermivora chrysoptera) are two declining young forest species. Conservation plans for both species use an adaptive management framework, which is an iterative process of planning, management actions, and monitoring and evaluation, in the context of species conservation goals. Adaptive management …
Spatio-Temporal Dynamics Of Atlantic Cod Bycatch In The Maine Lobster Fishery And Its Impacts On Stock Assessment, Robert E. Boenish
Spatio-Temporal Dynamics Of Atlantic Cod Bycatch In The Maine Lobster Fishery And Its Impacts On Stock Assessment, Robert E. Boenish
Electronic Theses and Dissertations
Of the most iconic fish species in the world, the Atlantic cod (Gadus morhua, hereafter, cod) has been a mainstay in the North Atlantic for centuries. While many global fish stocks have received increased pressure with the advent of new, more efficient fishing technology in the mid-20th century, exceptional pressure has been placed on this prized gadoid. Bycatch, or the unintended catch of organisms, is one of the biggest global fisheries issues. Directly resulting from the failed recovery of cod in the GoM, attention has been placed as to possible sources of unaccounted catch. Among the most …
Polyp To Population: A Tale Of Two Corals, Christopher T. Fountain
Polyp To Population: A Tale Of Two Corals, Christopher T. Fountain
Electronic Theses and Dissertations
Deep-sea corals are of conservation concern in the North Atlantic due to prolonged disturbances associated with the exploitation of natural resources and a changing environment. As a result, the recovery rates of deep-sea coral communities are of heightened interest. These recovery rates are suggested to be on the order of decades to millennia, based on slow growth rates and longevity, of various deep-sea coral species. In 2014 and 2017 two research cruises in the Gulf of Maine, collected samples of two locally dominant species, Primnoa resedaeformis and Paramuricea placomus. These specimen collections were coupled with video surveys, conducted by …
Survival, Harvest, And Drumming Ecology Of Ruffed Grouse In Central Maine, Usa, Samantha Davis
Survival, Harvest, And Drumming Ecology Of Ruffed Grouse In Central Maine, Usa, Samantha Davis
Electronic Theses and Dissertations
Understanding population dynamics and how species interact with their environment are important components for conservation and management. Ruffed grouse (Bonasa umbellus) are a widely distributed and common game bird in North America and are a considered an important economic and cultural icon in Maine. Although they are a well-studied species, there has been little research focused on ruffed grouse population dynamics and habitat relationships in Maine. My thesis aims to improve this knowledge gap by focusing on research related to survival and harvest of ruffed grouse, as well as male ruffed grouse resource selection at breeding display sites. Ruffed grouse …
Assessment Of A Hatchery Based Rainbow Smelt Supplementation Effort, Andrew O'Malley
Assessment Of A Hatchery Based Rainbow Smelt Supplementation Effort, Andrew O'Malley
Electronic Theses and Dissertations
Rainbow Smelt (Osmerus mordax) are an important fish distributed throughout northeastern North America with both anadromous and landlocked populations. Abundance, size at age, and maximum size vary widely among populations and life histories. In order to compare anadromous and landlocked populations, we collected spawning adults in 2014 from four anadromous and three landlocked populations. Scales and otoliths from the anadromous fish were examined and compared for estimates of bias and precision in ageing. Analysis of both scales and otoliths provided age estimates that were acceptable, but estimates from scales were more precise and had less bias. Otoliths were …
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 …
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: 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 …