Red Drum And Spotted Seatrout Live-Release Tournament Mortality And Dispersal,
2021
University of South Alabama
Red Drum And Spotted Seatrout Live-Release Tournament Mortality And Dispersal, T. Reid Nelson, Crystal Hightower, Sean P. Powers
University Faculty and Staff Publications
Although catch-and-release fishing tournaments undoubtedly reduce mortality of target species, postrelease mortality and fish stockpiling at release sites remain common concerns related to these tournaments. The impacts of liverelease tournaments on freshwater species have been widely studied. However, research on estuarine sport fishes is lacking even though catch-and-release tournaments targeting these species are prevalent and popular recreational fisheries exist. Therefore, we estimated the post-weigh-in mortality and dispersal of Red Drum Sciaenops ocellatus and Spotted Seatrout Cynoscion nebulosus released from the 2016–2018 Alabama Deep Sea Fishing Rodeo live-weigh-in categories using acoustic telemetry. To concurrently estimate overall post-weigh-in mortality and dispersal, we …
Impacts Of Extreme Environmental Disturbances On Piping Plover Survival Are Partially Moderated By Migratory Connectivity,
2021
USGS Northern Prairie Wildlife Research Center
Impacts Of Extreme Environmental Disturbances On Piping Plover Survival Are Partially Moderated By Migratory Connectivity, Kristen S. Ellis, Michael J. Anteau, Francesca J. Cuthbert, Cheri L. Gratto-Trevor, Joel G. Jorgensen, David J. Newstead, Larkin Powell, Megan M. Ring, Mark H. Sherfy, Rose J. Swift, Dustin L. Toy, David N. Koons
Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications
Effective conservation for listed migratory species requires an understanding of how drivers of population decline vary spatially and temporally, as well as knowledge of range-wide connectivity between breeding and nonbreeding areas. Environmental conditions distant from breeding areas can have lasting effects on the demography of migratory species, yet these consequences are often the least understood. Our objectives were to 1) evaluate associations between survival and extreme environmental disturbances at nonbreeding areas, including hurricanes, harmful algal blooms, and oil spills, and 2) estimate migratory connectivity between breeding and nonbreeding areas of midcontinental piping plovers (Charadrius melodus). We used capture …
Cooperative Feeding In Common Dolphins As Suggested By
Ontogenetic Patterns In Δ15N Bulk And Amino Acids,
2021
Centro de Investigación Científica y de Educación Superior de Ensenada,
Cooperative Feeding In Common Dolphins As Suggested By Ontogenetic Patterns In Δ15N Bulk And Amino Acids, Rocio I. Ruiz-Cooley, Tim Gerrodette, Susan Chivers, Kerri Danil
United States Department of Commerce: Staff Publications
1. Understanding the effect of stage-specific traits on species feeding habits can reveal how natural selection shapes life strategies. Amino acid (AA) nitrogen stable isotopes (δ15N) provide multiple proxies of habitat baseline values and diet that can improve our understanding of species feeding strategies relative to their animal metabolism. We evaluated the effect of body length as a proxy for life stage and sex on the feeding habits of the common dolphin Delphinus delphis delphis using δ13C and δ15N in bulk tissue and AAs δ15N from skin samples collected for almost two …
Modelling Climatic And Temporal Influences On Boating Traffic With Relevance To Digital Camera Monitoring Of Recreational Fisheries,
2021
Edith Cowan University
Modelling Climatic And Temporal Influences On Boating Traffic With Relevance To Digital Camera Monitoring Of Recreational Fisheries, Ebenezer Afrifa-Yamoah, Stephen M. Taylor, Ute A. Mueller
Research outputs 2014 to 2021
Digital camera monitoring data on recreational boating traffic are often manually interpreted and the reading cost can be expensive. Typically, these data are used along with other periodic survey information and camera data between these surveys may not be read, creating gaps in the time series. We predicted recreational boating traffic during these ‘gap’ periods using historical camera data and covariates to complete the time series data. Predictive models were built in a Bayesian regression modelling framework to determine the daily distribution of recreational boating traffic at two ramps in Western Australia based on climatic variables (temperature, humidity, wind speed, …
Environmental Controls On The Spatial Distribution Of Greenfin Darters And Biodiversity In The Blue Ridge Mountains,
2021
Claremont Colleges
Environmental Controls On The Spatial Distribution Of Greenfin Darters And Biodiversity In The Blue Ridge Mountains, Dri Tattersfield
CMC Senior Theses
Disproportionate concentrations of biodiversity in mountains worldwide suggest linkages between geologic processes and biodiversity that are not yet well understood. The Tennessee River Basin in the Blue Ridge Mountains of the southeastern U.S. is a global hotspot for freshwater fish biodiversity. To investigate drivers of biodiversity in the Tennessee River Basin, and explore links to geologic processes, I study the Greenfin Darter (Nothonotus chlorobranchius), a small fish endemic to the upper Tennessee River Basin. I use generalized linear models (GLMs) to evaluate the influence of topography, lithology, climate and land use on the distribution of the Greenfin Darter, …
Modeling Energy Flows In Floating In-Pond Raceways Utilizing Solar Power Back-Up,
2021
University of Kentucky
Modeling Energy Flows In Floating In-Pond Raceways Utilizing Solar Power Back-Up, Bo Smith
Theses and Dissertations--Biosystems and Agricultural Engineering
The In-pond Raceway (IPR) is a novel option for production aquaculture, depending on water moving devices to provide constant flow. Device failure may result in catastrophic fish loss, requiring power backup systems to mitigate risk in case of power outages. Because these systems must be dependable and many suitable locations are remote, off-grid solar photovoltaic (PV) systems with battery storage have been considered since they eliminate need for utility power. Such systems can be hard to size and expensive. This study modeled system requirements using an energy balance to determine whether systems could withstand varying loads based on climatological conditions. …
Global Connectivity Of Southern Ocean Ecosystems,
2021
Old Dominion University
Global Connectivity Of Southern Ocean Ecosystems, Eugene J. Murphy, Nadine M. Johnston, Eileen E. Hofmann, Richard A. Phillips, Jennifer A. Jackson, Andrew J. Constable, Sian F. Henley, Jessica Melbourne-Thomas, Rowan Trebilco, Rachel D. Cavanagh, Geraint A. Tarling, Ryan A. Saunders, David K.A. Barnes, Daniel P. Costa, Stuart P. Corney, Ceridwen I. Fraser, Juan Höfer, Kevin A. Hughes, Chester J. Sands, Sally E. Thorpe, Philip N. Trathan, José C. Xavier
CCPO Publications
Southern Ocean ecosystems are globally important. Processes in the Antarctic atmosphere, cryosphere, and the Southern Ocean directly influence global atmospheric and oceanic systems. Southern Ocean biogeochemistry has also been shown to have global importance. In contrast, ocean ecological processes are often seen as largely separate from the rest of the global system. In this paper, we consider the degree of ecological connectivity at different trophic levels, linking Southern Ocean ecosystems with the global ocean, and their importance not only for the regional ecosystem but also the wider Earth system. We also consider the human system connections, including the role of …
Factors Influencing Aquatic Invertebrate Diversity In Mine Pit Lakes Along The Mesabi Iron Range,
2021
Bemidji State University
Factors Influencing Aquatic Invertebrate Diversity In Mine Pit Lakes Along The Mesabi Iron Range, Jeremy Laurich
Journal of Earth and Life Science
Restoration of mine pit lakes for recreation is going to be very important for the future of Minnesota’s Mesabi Iron Range area. As many as 250 lakes will need to be restored in the future along this 100-kilometer-long swath of mining country. Information regarding the organisms that currently inhabit these lakes is important for future restorations to be a success. The focus of this study was to identify the types of aquatic invertebrates present in pit lakes and to identify some of the factors that influence their abundance and diversity. During this study, invertebrate samples were taken along the shore …
Is There A Relationship Between Aquatic Vegetation And Amphipod Stocking Mortality?,
2021
Bemidji State University
Is There A Relationship Between Aquatic Vegetation And Amphipod Stocking Mortality?, Alaina Taylor
Journal of Earth and Life Science
Amphipod occurrence and abundance has declined in the Prairie Pothole Region (PPR). Wildlife managers have stocked prairie pothole wetlands with Gammarus lacustris since 2018 to establish self-sustaining populations. G. lacustris have been detected in only 2 of 22 stocked basins, suggesting that they have died or failed to reproduce in most stocking attempts. Aquatic plant surveys were conducted in stocked wetlands and compared to data from surveys of wetlands with naturally occurring populations to understand if G. lacustris would be expected to survive in stocked wetlands based on characteristics of the aquatic vegetation communities. SAV coverage was significantly higher in …
Predicting Total Length Of Fish In Minnesota Lakes Using Bony Structure Dimensions,
2021
Bemidji State University
Predicting Total Length Of Fish In Minnesota Lakes Using Bony Structure Dimensions, Jay Holland
Journal of Earth and Life Science
This study seeks to establish a relationship between a fish’s total length to the size of various bony structures of prey fishes. Three important prey fish species in Minnesota were selected for examination in this study, including Black Crappie Pomoxis nigromaculatus, Bluegill Lepomis macrochirus, and Yellow Perch Perca flavescens. Length and weight dimensions of each fish’s otoliths, cleithra, and vertebrae were associated to total lengths of the fish they came from. In many dietary studies, the need for these relationships is strongly related to the disfigurement or degradation of prey fish in stomach samples. With accurate enough regression equations, researchers …
Abiotic Factors Effect On Summertime Fish Sampling,
2021
Bemidji State University
Abiotic Factors Effect On Summertime Fish Sampling, Kyle Oxley
Journal of Earth and Life Science
Fish surveys are vital in understanding various information about a fishery. Surveys lay the groundwork to how an agency views the status of the fishery, are used to set appropriate regulations, and manage stocking. Understanding which areas of a fishery holds the greatest density of fish is key to achieving the most accurate sample that reflects the fishery. The objective of this study was to track fish densities throughout the summer of 2021 and establish if there is a relationship between high fish density locations and specific water column characteristics. Fish density, temperature, and dissolved oxygen were measured bimonthly at …
Burbot Post-Spawn Diet,
2021
Bemidji State University
Burbot Post-Spawn Diet, Madison Gibson
Journal of Earth and Life Science
Burbots have become an increasingly popular game fish among anglers and have become a strong predator within the systems, consuming a wide variety of organisms. Therefore, the objective of this study was to compare male and female burbots diets post-spawn in a system. Burbots angled from Bad Medicine Lake were sacrificed and the stomach contents were observed, categorized by the lowest taxonomic key, and then weighed in grams. Percent by weight was calculated for each category of organisms and presented in a pie charts. In all three analyses, crustaceans were the main source of the diet structure at more than …
Exploring The Genetic Variability Of Zebra Mussels Dreisenna Polymoprha,
2021
Bemidji State University
Exploring The Genetic Variability Of Zebra Mussels Dreisenna Polymoprha, Maxwell Carr
Journal of Earth and Life Science
Zebra Mussels Dreisenna polymorpha are one of the most well-known invasive species here in the United States. This species can take over watersheds very quickly, causing damage to both the ecosystem and man-made structures. The basic physical behavior of this species has been well documented, but the invasive North American Zebra Mussel is much more aggressive and therefore causes more damage in the Great Lakes region compared to its native waters. Genetic variation may be playing a very large role in how and why D. polymorpha is causing such large problems for stakeholders in the United States. This review cites …
Effectiveness Of Endothall Treatment In Reducing Potamogeton Crispus In Lake Julia,
2021
Bemidji State University
Effectiveness Of Endothall Treatment In Reducing Potamogeton Crispus In Lake Julia, Jake Sorensen
Journal of Earth and Life Science
Curly leaf pondweed Potamogeton crispus, is a submerged aquatic plant non-native to North America. It was most likely introduced when common carp Cyprinus carpio were intentionally brought to the Midwest. Endothall is an aquatic herbicide commonly used to control curlyleaf pondweed in lakes. This study focused on collecting data from Lake Julia in Sherburne County, MN. Lake Julia is treated annually in the spring to control curlyleaf pondweed. The results show treatment areas saw a significant increase in vegetation density compared to control areas (P < 0.01). Changes in percent vegetation coverage by date were insignificant (P = 0.24). No significant signs of fish kills were observed. Because this study looked at overall vegetation coverage instead of specifically curlyleaf pondweed, we cannot conclude the increase in vegetation coverage was from curlyleaf pondweed alone. Based on the results from Poovey et al. (2002) we would expect lower vegetation coverage in treatment areas instead of the increased vegetation coverage observed in our study. This suggests the possibility that the endothall treatment successfully killed curlyleaf pondweed in treated areas, which allowed for new growth of submerged aquatic plants to take place as water temperatures increased.
Soil Response Of Helicopter Liming In The Monongahela National Forest,
2021
West Virginia University
Soil Response Of Helicopter Liming In The Monongahela National Forest, Jarrett Douglas Fowler
Graduate Theses, Dissertations, and Problem Reports (ETD)
Soils in the Monongahela National Forest (MNF) are acidic due to sandstone parent material, acid deposition, uptake of base cations by vegetation, and release of organic acids by organic matter (OM) decomposition. Increases in soil acidity have caused declines in forest health and changed species composition and nutrient status. Liming can neutralize soil acidity, but no large-scale liming projects have been done on acid forest soils in the USA. In anticipation of acquiring funding for a proposed liming project in the MNF, in 2007 and 2009 10 sites were selected to sample and analyze soils before lime was applied. In …
Changes In The Philippine Coastal Environment,
2021
Ateneo de Manila University
Changes In The Philippine Coastal Environment, Karl H. Szekielda, Ma. Aileen Leah G. Guzman
Environmental Science Faculty Publications
Global warming is progressing at a faster speed than has been estimated earlier in climate forecasting, and the ocean responds rather quickly to global temperature increase. This study uses remotely sensed data that were accessed from the System for Multidisciplinary Research and Applications (NASA Giovanni) to study environmental change in the Philippines’ coast. Monthly averaged sea surface temperature series from around the Philippines indicate that the Philippines follow the global trend in ocean temperature increase and show the increase of about 0.50C within two decades. Despite the high variability in temperature, the linear regressions displayed for all seasons show an …
Effects Of Harvest Regulations And Post-Release Hooking Mortality On Walleye Populations In South Dakota,
2021
South Dakota State University
Effects Of Harvest Regulations And Post-Release Hooking Mortality On Walleye Populations In South Dakota, Cade Lyon
Electronic Theses and Dissertations
Harvest regulations are commonly implemented to manipulate fisheries stocks. By regulating the size and number of fish that are harvested by anglers, managers are able to meet the goals and needs of regions. However, these management actions come with the potential for negative consequences. Overexploitation due to less restrictive harvest regulations can cause collapses in fisheries populations. In addition, indirect consequences such as hooking mortality brought on by length-based regulations can also be detrimental to populations. In this study, I investigated the effects of various harvest regulations on Walleye populations in three western South Dakota irrigation reservoirs: Angostura, Belle Fourche, …
Evaluation Of Population Structure, Age, Growth, And Mortality Of Blue Catfish And Flathead Catfish Within The Robert C. Byrd Pool Of The Ohio And Kanawha Rivers,
2021
West Virginia University
Evaluation Of Population Structure, Age, Growth, And Mortality Of Blue Catfish And Flathead Catfish Within The Robert C. Byrd Pool Of The Ohio And Kanawha Rivers, Joseph Vincent Siegel
Graduate Theses, Dissertations, and Problem Reports (ETD)
The Ohio River is continuing to recover from a long history of anthropogenic impacts. Blue Catfish were considered locally extirpated from the West Virginia sections and have been reintroduced through fingerling stockings beginning in 2002. Flathead Catfish are naturally sustaining in the pool and combined with Blue Catfish provide two popular recreational fisheries. The Blue Catfish and Flathead Catfish studies shared similar objectives: (1) evaluating size structure, (2) estimating growth rates, and (3) estimating annual mortality. From 2017 to 2020, we collected catfish annually through low frequency electrofishing and trotline surveys at 10 fixed locations. Electrofishing catch rates for Blue …
Potential Solar Replacement Of Hydroelectricity To Reopen Rivers: Maine As A Case Example,
2021
New York State Department of Environmental Conservation
Potential Solar Replacement Of Hydroelectricity To Reopen Rivers: Maine As A Case Example, Shailesh Sharma, John Waldman
Publications and Research
Hydroelectricity provides 6% of U.S. electrical power needs, but hydro-dams also cause environmental harm, including the retardation or complete blockage of spawning runs of anadromous fishes. To facilitate fish movements, engineered-fishways have long been used but many have performed poorly. Dam-removal is the most effective way of restoring dwindling migratory fish populations by allowing unrestricted pathways to their spawning areas and for the downstream migrations of post-spawning adults and juveniles. However, removals of hydro-dams result in a loss of electricity production. For the replacement of energy foregone from hydro-dam removals, various alternative energy installations are now feasible. We present one-to-one …
24andmore: Using Genome-Wide Snps To Investigate The Genetic Diversity Of Iowa Walleye (Sander Vitreous) Broodstock,
2021
University of Northern Iowa
24andmore: Using Genome-Wide Snps To Investigate The Genetic Diversity Of Iowa Walleye (Sander Vitreous) Broodstock, Rachel Ann Mcdonnell
Dissertations and Theses @ UNI
The stocking of Sander vitreus in Iowa waterbodies is one of the primary tools used by the Iowa Department of Natural Resources (DNR) to ensure healthy populations for enjoyable fishing experiences. A substantial amount of time and money goes into this effort, so stocking efficiency is vital. Knowledge of genetic diversity contained in the broodstock increases this efficiency by having a better understanding of which strain will survive and contribute to the fishery in certain environments. The objective of this study is to investigate the genetic diversity of Iowa S. vitreus broodstock to identify genetic ancestry and quantify the genetic …
