A Preliminary Assessment Of The Spawning Potential Ratio Of Five Target Species Of The Coastal Gillnet Fishery In Guyana And Suriname,
2023
World Wildlife Fund Guianas
A Preliminary Assessment Of The Spawning Potential Ratio Of Five Target Species Of The Coastal Gillnet Fishery In Guyana And Suriname, Tomas Willems, Elford Liverpool, Michael Hiwat
Gulf and Caribbean Research
Data—limited stock assessment methods have the potential to positively impact livelihoods of fishermen around the world by providing management recommendations that aim to optimize sustainable yields from fisheries. Some years ago, a novel length— based (LB) method was developed for the assessment of spawning potential ratio (SPR), a measure of the reproductive capacity of fish stocks. We applied the LB—SPR method to 5 important target species of the coastal gillnet fishery in Guyana and Suriname. Nebris microps (Smalleye Croaker; 32% SPR) and Macrodon ancylodon (King Weakfish; 34% SPR) had the highest spawning potential, but remained below the 40% target level …
Pond-Breeding Amphibian Responses To Wetland Creation And Reforestation On A Legacy Surface Mine In The Monongahela National Forest,
2023
University of Kentucky
Pond-Breeding Amphibian Responses To Wetland Creation And Reforestation On A Legacy Surface Mine In The Monongahela National Forest, Lauren Breanna Sherman
Theses and Dissertations--Forestry and Natural Resources
Surface mine reclamation has been an evolving practice since the Surface Mining Control and Reclamation Act was passed in 1977, holding mining companies accountable for returning ecological function to areas directly impacted by mining activities. One recent method of reclamation, the Forestry Reclamation Approach (FRA), aims to enhance reforestation and ecosystem function through the creation of wetlands, as opposed to traditional methods that often revert land to grasslands. However, wildlife response to FRA has rarely been investigated. The goal of this project was to analyze the effects of the four treatment types, FRA in two chronosequences, natural regeneration, and unmined …
Activity Patterns Of The Critically Endangered Central American River Turtle (Dermatemys Mawii),
2023
Missouri State University
Activity Patterns Of The Critically Endangered Central American River Turtle (Dermatemys Mawii), Cora Dyslin
Graduate Theses/Dissertations
The Central American River Turtle (Dermatemys mawii) is native to southern Mexico, eastern Guatemala, and Belize and is primarily restricted to watersheds that drain into the Gulf of Mexico and Caribbean Sea. Hunting, both for personal consumption and market meat, has been the primary driver of declines, and the species is now classified as critically endangered. Results from past studies that have used netting and visual surveys to detect D. mawii suggest that the species is chiefly nocturnal. However, it is unclear to what extent the perception of nocturnality has been biased by the timing of survey efforts …
Abundance-Habitat Relationships And Aquatic-Terrestrial Habitat Selection Patterns For Wood Turtles (Glyptemys Insculpta) In The Upper Midwest,
2023
West Virginia University
Abundance-Habitat Relationships And Aquatic-Terrestrial Habitat Selection Patterns For Wood Turtles (Glyptemys Insculpta) In The Upper Midwest, Jena Marie Staggs
Graduate Theses, Dissertations, and Problem Reports (ETD)
Due to range-wide population declines, wood turtles (Glyptemys insculpta) are under review for federal listing under the United States Endangered Species Act. Understanding how habitat associations and environmental conditions influence population dynamics and spatiotemporal activity patterns is fundamental for designing effective management strategies. Previous work on wood turtle abundance-habitat relationships focused on broad-scale habitat relationships in northeastern North America. However, regional differences in climate, habitat conditions, and land use patterns limit their applicability to much of the wood turtle’s Upper Midwest distribution. Much of our understanding of wood turtle activity patterns is based on radiotelemetry studies, which are biased towards …
The Links To Cancer: How Golf Became Dangerous And What We Can Do To Save The Game,
2023
University of Montana, Missoula
The Links To Cancer: How Golf Became Dangerous And What We Can Do To Save The Game, Meredith Boos
Undergraduate Theses, Professional Papers, and Capstone Artifacts
This study is a comprehensive meta-analysis on health claims linked to exposure to golf courses, more specifically the chemicals used to maintain their appearance. It provides a brief history of the golf industry and how its growth exacerbated the environmental impact as well as an explanation of the legal landscape that will affect golf course management. Golf courses can disrupt local ecologies, contaminate ground water, rivers, lakes and streams with run-off, and be responsible for the bioaccumulation of chemicals which remain dangerous for decades. Despite the adverse effects of golf courses on the environment, there remains an opportunity to transform …
Integrating Human Dimensions In Decadal-Scale Prediction For Marine Social Ecological Systems: Lighting The Grey Zone,
2023
Old Dominion University
Integrating Human Dimensions In Decadal-Scale Prediction For Marine Social Ecological Systems: Lighting The Grey Zone, Jess Melbourne-Thomas, Desiree Tommasi, Marion Gehlen, Eugene J. Murphy, Jennifer Beckensteiner, Francisco Bravo, Tyler D. Eddy, Mibu Fischer, Elizabeth Fulton, Mayya Gogina, Eileen Hofmann, Maya Ito, Sara Mynott, Kelly Ortega-Cisneros, Anna N. Osiecka, Mark R. Payne, Romeo Saldívar-Lucio, Kim J.N. Scherrer
CCPO Publications
The dynamics of marine systems at decadal scales are notoriously hard to predict-hence references to this timescale as the "grey zone" for ocean prediction. Nevertheless, decadal-scale prediction is a rapidly developing field with an increasing number of applications to help guide ocean stewardship and sustainable use of marine environments. Such predictions can provide industry and managers with information more suited to support planning and management over strategic timeframes, as compared to seasonal forecasts or long-term (century-scale) predictions. The most significant advances in capability for decadal-scale prediction over recent years have been for ocean physics and biogeochemistry, with some notable advances …
Seasonal Habitat Preference And Foraging Behaviour Of Post-Moult Weddell Seals In The Western Ross Sea,
2023
Old Dominion University
Seasonal Habitat Preference And Foraging Behaviour Of Post-Moult Weddell Seals In The Western Ross Sea, Kimberly T. Goetz, Michael S. Dinniman, Luis A. Hückstädt, Patrick W. Robinson, Michelle R. Shero, Jennifer M. Burns, Eileen E. Hofmann, Sharon E. Stammerjohn, Elliott L. Hazen, David G. Ainley, Daniel P. Costa
CCPO Publications
Weddell seals (Leptonychotes weddellii) are important predators in the Southern Ocean and are among the best-studied pinnipeds on Earth, yet much still needs to be learned about their year-round movements and foraging behaviour. Using biologgers, we tagged 62 post-moult Weddell seals in McMurdo Sound and vicinity between 2010 and 2012. Generalized additive mixed models were used to (i) explain and predict the probability of seal presence and foraging behaviour from eight environmental variables, and (ii) examine foraging behaviour in relation to dive metrics. Foraging probability was highest in winter and lowest in summer, and foraging occurred mostly in …
Hide And Seek: An Exploration Of Antipredator And Predator Avoidance Mechanisms In Orthopodomyia Signifera In Response To Predation From Toxorhynchites Rutilus,
2023
The University of Southern Mississippi
Hide And Seek: An Exploration Of Antipredator And Predator Avoidance Mechanisms In Orthopodomyia Signifera In Response To Predation From Toxorhynchites Rutilus, Nathaniel Dahlberg
Master's Theses
There have been many observations of larval Orthopodomyia signifera coexisting with the predator Toxorhynchites rutilus. There are three hypotheses that could explain how Or. signifera resists predation from Tx. rutilus. The first hypothesis states that larvae adapt behavioral changes that limit predation. The second hypothesis states thoracic setae serve as a physical defense that prevents Tx. rutilus from grasping Or. signifera. The third hypothesis states Or. signifera possess a chemical defense indicated by aposematic coloration. To test the first hypothesis larval Or. signifera were exposed to conspecific and heterospecific predation cues and their behavior was observed. Both cues …
Teaching Agroecology: Preparing Students For Navigating Uncharted Territory,
2023
University of Nebraska-Lincoln
Teaching Agroecology: Preparing Students For Navigating Uncharted Territory, Charles A. Francis, Steve Gliessman
Department of Agronomy and Horticulture: Faculty Publications
Agroecologists understand that farming and food systems are more complex than the aggregation of their components. This realization drives our choices of learning strategies and activities that will prepare students for complexity and uncertainty. Our quest for a just, sustainable, and nutritious food system adequate to equitably serve everyone on the planet today and into the future is an enormous challenge. An undertaking of this magnitude will be met only with major adjustments informed by thoughtful teaching and practicing problem solving skills through a new educational lens. The principles of agroecology help us focus this lens on the wicked problems …
Wetland Walk Vr: Field Ecology In Northeast Florida,
2023
University of North Florida
Wetland Walk Vr: Field Ecology In Northeast Florida, Kailan Sindelar
UNF Faculty Research and Scholarship
Join Field Ecologists of the University of North Florida as they begin to monitor the water in swamps and marshes. In this virtual reality experience you will walk through places that are normally too dangerous or harmful to visit, learning about life in these places, how we study it, and how you may connect to it.
Host-Microbe Interactions In Non-Native Estuarine Anemones: Biogeography And Temperature,
2023
Cal Poly Humboldt
Host-Microbe Interactions In Non-Native Estuarine Anemones: Biogeography And Temperature, Parker K. Lund
Cal Poly Humboldt theses and projects
Non-native species are increasing in prevalence around the world, resulting in negative economic and ecological impacts. However, the broad distributions of non-native species also offer a system for investigating the response of host-associated microbial communities to environmental factors across a range of ecological scales. At the broadest scale, I investigated the geography of microbial communities in the non-native estuarine anemone Diadumene lineata on the west coast of the United States of America. Across latitudes, microbial community composition was very similar and displayed a high percentage of Klebsiella spp. at all sites. However, the communities in California tended to exhibit higher …
Carnivore And Ungulate Occurrence In A Fire-Prone Region,
2023
California State Polytechnic University Humboldt
Carnivore And Ungulate Occurrence In A Fire-Prone Region, Sara J. Moriarty-Graves
Cal Poly Humboldt theses and projects
Increasing fire size and severity in the western United States causes changes to ecosystems, species’ habitat use, and interspecific interactions. Wide-ranging carnivore and ungulate mammalian species and their interactions may be influenced by an increase in fire activity in northern California. Depending on the fire characteristics, ungulates may benefit from burned habitat due to an increase in forage availability, while carnivore species may be differentially impacted, but ultimately driven by bottom-up processes from a shift in prey availability. I used a three-step approach to estimate the single-species occupancy of four large mammal species: mountain lion (Puma concolor), coyote …
Using Multiscale Ensemble Habitat Models To Identify Wildfire Risk To Habitat For An Iconic Forest Species,
2023
California State Polytechnic University, Humboldt
Using Multiscale Ensemble Habitat Models To Identify Wildfire Risk To Habitat For An Iconic Forest Species, Logan Baker Hysen
Cal Poly Humboldt theses and projects
Large and severe wildfires, exacerbated by climate change and human behavior, are occurring more frequently in many forests across the western United States. While wildfire is a natural part of most terrestrial ecosystems, rapidly changing fire regimes have the potential to alter habitat beyond the adaptive capabilities of species. Spatial assessments of wildfire risks to species habitat may allow managers to pinpoint locations for management activities. To illustrate this, I spatially assessed wildfire risk within habitat that supports the nesting activity of the federally threatened northern spotted owl (Strix occidentalis caurina) in the California redwood coast ecoregion. To …
Relationships Between Watershed Factors And Community Size Spectra Of The Fish And Macroinvertebrate Communities Of Mid-Appalachian Streams,
2023
West Virginia University
Relationships Between Watershed Factors And Community Size Spectra Of The Fish And Macroinvertebrate Communities Of Mid-Appalachian Streams, Jarrett Hunter Landreth
Graduate Theses, Dissertations, and Problem Reports (ETD)
Freshwater lotic communities are complex, dynamic, and quick to respond to changes to their environment. However, some of the specific mechanisms driving those changes are yet to be fully understood. Here, I will use the community size spectrum (CSS) approach to assess how the CSS slope, elevation, and food chain length of the fish and macroinvertebrate assemblages as well as the combined CSS of 15 mid-sized (2nd-4th order) streams in north-central West Virginia respond across gradients of watershed factors (drainage area, mean drainage slope, mean drainage elevation, drainage % forest, and stream specific conductance). Field sampling was carried out in …
Artistic Engagement With Monadnock: A Hermeneutic Phenomenological Study,
2023
Antioch University of New England
Artistic Engagement With Monadnock: A Hermeneutic Phenomenological Study, Jonathan W. Coffin
Antioch University Dissertations & Theses
This hermeneutic phenomenological study discloses the lived experience of creating art in association with New Hampshire’s Mount Monadnock. This study reveals the potential for artistic invention in association with place gradually to undermine an established sense of separation from environment and to prompt conscious awareness of continuity with environment. A series of interviews with four artists who create art of or in the presence of Monadnock revealed in the lived experience of creating Monadnock art a process that consists of five phases: first encounter, abstract appreciation, existential understanding, sustained attention, and continuity. A hermeneutic circular method of interpretation based upon …
A Diet Comparison Of Bluegill And Bluegill X Pumpkinseed Hybrids,
2023
Bemidji State University
A Diet Comparison Of Bluegill And Bluegill X Pumpkinseed Hybrids, Russell D. Zwiers
Journal of Earth and Life Science
Bluegill Lepomis macrochirus and pumpkinseed Lepomis gibbosus commonly prey upon macroinvertebrates but have been found to show different preferences to what type of macroinvertebrates. Hybrids of the two species have been found to display physical characteristics of both parents but prey selection of the hybrids compared to the parents is unknown. Therefore, the objective of this study was to analyze the diets of bluegill and bluegill x pumpkinseed hybrids to understand what each species’ preference is when it comes to food as well as finding how a hybrid’s diet compares to the pure breed of one of the two crossed …
Effects Of Velocity And Substrate Size On The Formation Of Zebra Mussel Druses,
2023
Bemidji State University
Effects Of Velocity And Substrate Size On The Formation Of Zebra Mussel Druses, Ian Mott
Journal of Earth and Life Science
Zebra Mussels Dreissena polymorpha are an invasive bivalve species that are highly successful at dominating new environments. These invaders have been known to colonize substrate so thoroughly that all they have to attach to are members of their own species. When large mats of interconnected mussels completely cover a riverbed, it can have a drastic effect on the surrounding environment. This study serves to create a better understanding of the hydrologic parameters needed for Zebra Mussels to create these ecosystem-transforming colonies known as druses. Data was collected on a small stretch of the Upper Mississippi River in Northern Minnesota, previously …
Estimate Of Long-Term Phytoplankton Biomass In Lake Bemidji,
2023
Bemidji State University
Estimate Of Long-Term Phytoplankton Biomass In Lake Bemidji, William J. Peterson
Journal of Earth and Life Science
Phytoplankton are photosynthetic organisms that are the base of aquatic food webs. In a dimictic temperate lake such as Lake Bemidji, the environment adjusts with the changing water temperatures and sunlight levels. The phytoplankton in a dimictic lake are adapted to subsist in long term seasonal changes but the exact change to the number of phytoplankton in unknown. The focus of this study was to estimate the biomass of phytoplankton in a long term period including winter stratification and summer peak. From a period between March 2023 and October 2023 water samples were collected from the lake in the south …
Tekëne (Woodland),
2023
Delaware Tribe of Indians, Bartlesville, OK
Tekëne (Woodland), Jeremy Johnson, Heather A. Wholey, Stephanie Thompson
Gordon Natural Area History & Strategic Plan Documents
Tèkëne are highly biodiverse ecosystems comprised of plants and wildlife that thrive within four layers: tree canopy; understory; field; and forest floor. Temperate deciduous forests are naturally among the most bio-diverse habitats worldwide. The Lenape are among several indigenous cultures with deep ancestral ties to the Eastern Woodlands.
Straight From The Coyote’S Mouth: Genetic Identification Of Prey Through Oral Swabs Of Predators,
2023
USDA National Wildlife Research Center
Straight From The Coyote’S Mouth: Genetic Identification Of Prey Through Oral Swabs Of Predators, Julie K. Young, Amanda M. Mast, James A. Walton, Torrey Rodgers, Antionette J. Piaggio, Daniel R. Taylor, Karen E. Mock
United States Department of Agriculture Wildlife Services: Staff Publications
Human-carnivore conflicts often involve the depredation of domestic livestock. These depredation events are rarely observed, yet mitigation typically involves identifying the species or individual involved for removal or relocation. We tested a molecular method to identify individuals involved in depredation events using mouth swabs to determine if prey DNA could be detected, and for how long. We fed mule deer Odocoileus hemionus meat to captive coyotes Canis latrans and swabbed their mouths at five predetermined intervals between 2–72 h after consumption of the deer meat. We assessed two different molecular forensic methods to analyze the saliva swabs: qPCR for species …
