Spatial And Temporal Patterns In Short-Term Surface Sediment Deposition And Accretion At The Guana Tolomato Matanzas National Estuarine Research Reserve: Implications For Resilience Of Coastal Wetlands To Sea-Level Rise,
2025
University of North Florida
Spatial And Temporal Patterns In Short-Term Surface Sediment Deposition And Accretion At The Guana Tolomato Matanzas National Estuarine Research Reserve: Implications For Resilience Of Coastal Wetlands To Sea-Level Rise, Jacob Michael Berna
UNF Graduate Theses and Dissertations
Coastal wetlands are at risk of drowning due to the increasing threat of rising sea levels. Wetlands will have to build in elevation vertically or migrate horizontally to survive. Previous research has demonstrated that some wetlands have the potential to naturally build in elevation over time if deposition and accretion rates from allochthonous sediment delivery are substantial, but work in this area has been limited, and many coastal wetlands remain understudied. Portions of Northeast Florida are especially lacking in short-term surface deposition and accretion data. Without surface rates it is difficult to determine the vulnerability of different wetlands to rising …
The Presence Of Mercury (Hg) And Perfluoroalkyl Substances (Pfas) In The Guana And Tolomato Rivers,
2025
University of North Florida
The Presence Of Mercury (Hg) And Perfluoroalkyl Substances (Pfas) In The Guana And Tolomato Rivers, Morgan E. Lattomus
UNF Graduate Theses and Dissertations
The Guana and Tolomato Rivers provide essential habitat for several ecologically and economically important species and is a well-loved and recreated area. Spanning the northeastern Florida coast, the rivers are home to over 50 endangered or threatened species and host several habitat restoration projects due to their ecological significance and proximity to development along the coast. The effects of human influence and pollution, and specifically toxic metal mercury (Hg) and perfluoroalkyl substances (PFAS), are not well known within the system. Hg is known to biomagnify within food webs, and there is a considerable lack of literature concerning PFAS behavior within …
Evaluation Of The Maneuverability Of An 85m Fishing Trawler (Focusing On Dynamic Stability),
2025
Division of Navigation Convergence Studies, Korea Maritime and Ocean University, Busan 49112, Republic of Korea
Evaluation Of The Maneuverability Of An 85m Fishing Trawler (Focusing On Dynamic Stability), Chun-Ki Lee, Su-Hyung Kim
Journal of Marine Science and Technology–Taiwan
Most fishing vessels are less than 100 meters in length, so IMO maneuverability standards do not apply. As a result, studies on the maneuverability of fishing vessels are considerably fewer compared to those on merchant ships. However, with technological advancements, the size of fishing vessels continues to grow, and as more fishermen are on board, accidents could lead to fatal casualties. In response, the authors determined that research on the maneuverability of fishing vessels is urgently needed. Thus, the authors conducted a maneuverability evaluation on a fisheries training vessel with the hull shape of a fishing trawler, 85 meters in …
A Hybrid Image Filtering Approach For Improving Edge Detection Of Riverbed Particles With Complex Textures,
2025
Department of Soil and Water Conservation, National Chung Hsing University, Taichung, Taiwan ROC
A Hybrid Image Filtering Approach For Improving Edge Detection Of Riverbed Particles With Complex Textures, Po-Wei Lin, Hsun-Chuan Chan
Journal of Marine Science and Technology–Taiwan
The distribution of particle size in gravel-bed rivers affects the flow condition, sediment transport, and river morphology. However, conventional particle size analysis is laborious and time-consuming. To enhance the efficiency of particle size analysis, image-based methods have been widely explored, but complex particle textures increase the difficulty in identifying particle edges during image analysis. This study develops a filtering approach based on the rolling guidance filter and leverages the differences in grayscale gradients between particle edges and textures to design a guidance image tailored for the rolling guidance filter. This design enables the filter to preserve particle edges while smoothing …
Comparison Of Canopy Materials To Improve The Performance Of Sea Anchors Used For Fishing Operations,
2025
Oceanpolytech Team, Korea Institute of Maritime and Fisheries Technology, Busan 49111, Republic of Korea
Comparison Of Canopy Materials To Improve The Performance Of Sea Anchors Used For Fishing Operations, Namgu Kim, Su-Hyung Kim, Yoo-Won Lee, Kyung-Jin Ryu
Journal of Marine Science and Technology–Taiwan
Sea anchors used for fishing operations help improve catch rates by stabilizing vessel drift speeds to match tidal or ocean currents. The underwater resistance experienced by a sea anchor's canopy significantly impacts its performance, yet there has been limited research on canopy materials. This study investigates how different canopy materials can enhance sea anchor performance. Specifically, we tested sea anchors made from three fabrics: the currently used polyamide (PA) material, PA material with increased yarn density in the weft direction, and polyester (PES). Using Korean national standards, we compared the yarn density, weight, water absorption capacity, drying rate, air permeability, …
Research On Ship Track Prediction Based On Ipso-Cnn,
2025
Merchant Marine College, Shanghai Maritime University, Shanghai 201306, China
Research On Ship Track Prediction Based On Ipso-Cnn, Xiangen Bai, Nuo Chen, Xiaofeng Xu
Journal of Marine Science and Technology–Taiwan
With the rapid development of the global economy, international imports and exports have become increasingly important. Timely and effective tracking and prediction of ship trajectories are important in the face of complex maritime traffic. Based on AIS data, this study establishes a ship trajectory prediction model combining improved particle swarm optimization (IPSO) and a convolutional neural network (CNN) that uses the ship's historical navigation trajectory data to predict the future navigation trajectory. The historical ship trajectory data of the Port of Ningbo-Zhoushan were selected for the experiment, and the IPSO-CNN model experiment results were compared with those of other models. …
Automated Sponge Segmentation With Mask R-Cnn On Arms Plate Images For Reef Monitoring,
2025
San Jose State University
Automated Sponge Segmentation With Mask R-Cnn On Arms Plate Images For Reef Monitoring, Mrunali Abhijit Thokadiwala
Master's Projects
Climate change-driven ocean warming and acidification are disrupting the ecological balance of coral reefs. Notably, these oceanic conditions are undermining coral health and accelerating their decline which is favoring some sponge species in outcompeting them for dominance. Although functional, these altered reefs destabilize the reef architecture, hinder nutrient cycling, and support fewer marine species. Thus, monitoring the growth and abundance of various sponges and understanding their roles at different stages of ecological succession in coral reefs is vital. Autonomous reef monitoring structures (ARMS) are often used for this purpose, but manual taxonomic analysis using their images is time-consuming, inconsistent and …
Use Of Light Traps To Assess The Taxonomy And Seasonality Of Early Life Stages Of Fishes Recruiting To Upper Matagorda Bay In Texas,
2025
Texas Parks and Wildlife Department
Use Of Light Traps To Assess The Taxonomy And Seasonality Of Early Life Stages Of Fishes Recruiting To Upper Matagorda Bay In Texas, Polly Hajovsky, Joel Anderson, Damon Williford
Gulf and Caribbean Research
Detecting the ingress of larval and early juvenile fishes into estuaries is crucial for understanding the early life stages and population dynamics of species—specific recruitment seasonality. However, monitoring these early life stages presents challenges due to their small size, seasonal variability, spatial patchiness, and their use of structurally complex habitats. Although plankton nets have been widely used to sample larval fishes, light traps have been found to have more flexibility, durability, and cost—effective. This study aimed to assess the effectiveness of light traps for sampling larval and early juvenile fishes in a Texas estuary. The objectives of this study were …
Use Of Coelomic Fluid As A Noninvasive Indicator Of Reproductive Status In Elasmobranchs,
2025
University of North Florida
Use Of Coelomic Fluid As A Noninvasive Indicator Of Reproductive Status In Elasmobranchs, Emily Sapp
UNF Graduate Theses and Dissertations
Information on reproduction in elasmobranchs is important for the management and conservation of populations. However, the ability to obtain reliable data on elasmobranch reproduction without animal euthanasia is extremely limited. Therefore, there has been a call for nonlethal approaches for identifying reproductive status of elasmobranchs. Although useful, current techniques can be limited with respect to access to equipment and reliability of blood analyses. This study investigates whether a new noninvasive approach, the examination of coelomic fluid (CF), can provide a reliable indicator of reproductive status. CF is fluid that bathes the internal organs of the abdominal cavity, including ovaries, and …
Evaluation Of The Corrosion Of Metallic Fastener Joints In Composite Materials Immersed In Seawater,
2025
Florida Atlantic University
Evaluation Of The Corrosion Of Metallic Fastener Joints In Composite Materials Immersed In Seawater, Chloe Derrico
Electronic Theses and Dissertations
The corrosion behavior of metallic fasteners in contact with composite materials in marine environments remains a critical concern for structural integrity and long-term performance. This study evaluates the corrosion of marine fasteners of various materials in contact with glass fiber, carbon fiber, hybrid glass-carbon fiber, and G10/FR-4 Garolite composite plates. The research focuses on localized corrosion mechanisms, include crevice and pitting corrosion, as well as the influence of composite interactions. Samples were exposed to three environmental conditions: full immersion tanks, tidal tanks simulating the high and low tides, and deployment on a barge on Florida’s intracoastal waterway, with antifouling paint …
Squid Paralarvae Turn With High Agility Using Jets Near The Reynolds Number Threshold For Viscous Domination,
2025
Old Dominion University
Squid Paralarvae Turn With High Agility Using Jets Near The Reynolds Number Threshold For Viscous Domination, Ian K. Bartol, Alissa M. Ganley, Paul S. Krueger, Joseph T. Thompson
Biological Sciences Faculty Publications
Turning is critical for survival in the ocean, as marine animals need to maneuver to capture prey, elude predators, and navigate complex environments. While prior research has focused on turning performance of adult swimmers, less is known about early ontogenetic stages that locomote within lower Reynolds number (Re) regimes, especially young jetters. To evaluate squid paralarval turning proficiency and the role of the pulsed jet in maneuvers, recently hatched longfin squid Doryteuthis pealeii swimming in a viewing chamber were studied using digital particle image velocimetry and kinematic motion analyses. Paralarvae exhibited a wide repertoire of turning behaviors, including those performed …
Seasonal Variability Of Surface Ocean Carbon Uptake And Chlorophyll-A Concentration In The West Antarctic Peninsula Over Two Decades,
2025
Old Dominion University
Seasonal Variability Of Surface Ocean Carbon Uptake And Chlorophyll-A Concentration In The West Antarctic Peninsula Over Two Decades, Jessica S. Turner, David R. Munro, Amanda Fay, Sharon Stammerjohn, Heather Kim, Oscar Schofield, Heidi Dierssen
OES Faculty Publications
The Southern Ocean plays a vital role in global CO₂ uptake, but the magnitude and even the sign of the flux remain uncertain, and the influence of phytoplankton phenology is underexplored. This study focuses on the West Antarctic Peninsula, a region experiencing rapid climate change, to examine shifts in seasonal carbon uptake. Using 20 years of in situ air-sea CO₂ flux and satellite-derived Chlorophyll-a, we observe that the seasonal cycles of both air-sea CO₂ flux and Chlorophyll-a intensify poleward. The amplitude of the seasonal cycle of the non-thermal component of surface ocean pCO₂ increases with increasing latitude, while the amplitude …
Long-Term Abundance Estimates Of A Northeast Florida Estuarine Dolphin Community: Evaluating The Impacts Of The 2013–2015 Cetacean Morbillivirus Unusual Mortality Event,
2025
University of North Florida
Long-Term Abundance Estimates Of A Northeast Florida Estuarine Dolphin Community: Evaluating The Impacts Of The 2013–2015 Cetacean Morbillivirus Unusual Mortality Event, Allison L. Wilkins
UNF Graduate Theses and Dissertations
Tamanend's bottlenose dolphins (Tursiops erebennus) in the St. Johns River (SJR), Jacksonville, FL, are subjected to substantial anthropogenic stressors (e.g., vessel traffic, dredging, fisheries interactions) and were heavily impacted by the 2013-2015 Mid-Atlantic cetacean morbillivirus unusual mortality event (UME). High prevalence of skin lesions and frequent sightings of emaciated dolphins suggest declining health and viability of the SJR dolphin community. Sighting data from Jul. 2011 to Oct. 2019 provided the rare opportunity to investigate long-term changes in dolphin abundance surrounding the UME. This study produced the first dolphin abundance estimate within the Jacksonville Estuarine System stock since 1997, …
More Than One Way To Be A Planktivore: The Vast Morphospace Of Plankton-Feeding Reef Fishes,
2025
Edith Cowan University
More Than One Way To Be A Planktivore: The Vast Morphospace Of Plankton-Feeding Reef Fishes, Isabelle Ng, David R. Bellwood, Jan M. Strugnell, Sergio R. Floeter, Alexandre C. Siqueira
Research outputs 2022 to 2026
Planktivorous reef fishes are thought to possess unique morphological traits to feed on small, evasive prey. Despite the multitude of family-level studies addressing this hypothesis, results remain inconclusive. Our goal, therefore, was to determine whether specialised traits and patterns of morphological convergence are congruent across a comprehensive phylogeny of reef-associated fishes. We measured 15 morphological traits from 815 images of 299 species in 12 globally distributed families. Using phylogenetic comparative methods, we mapped the evolution of plankton-feeding across lineages; assessed the effect of planktivory on body shape; and tested for the presence of morphological convergence among planktivores. We demonstrate that …
Dr. Eric Angel Ramos - A Shooting Star That Inspired Marine Mammalogists And Beyond (1987 – 2024),
2025
The University of Vermont
Dr. Eric Angel Ramos - A Shooting Star That Inspired Marine Mammalogists And Beyond (1987 – 2024), Laura J. May-Collado, Jeremy J. Kiszka, Nataly Castelblanco-Martínez, Beth Brady, G. Rieucau, Daniel Gonzalez-Socoloske, Renata Sousa-Lima, Diana Reiss, Macelo Magnasco, Roderic Mast, Wayne Sentman, Joy S. Reidenberg
Faculty Publications
No abstract provided.
Predation Of A Sperm Whale (Physeter Macrocephalus) By Killer Whales (Orcinus Orca) In Guanaja, Honduras,
2025
Florida International University
Predation Of A Sperm Whale (Physeter Macrocephalus) By Killer Whales (Orcinus Orca) In Guanaja, Honduras, Gaby M. Ochoa, Eric Angel Ramos, Daniel Gonzalez-Socoloske
Faculty Publications
No abstract provided.
Using Algal Turf Scrubber Biomass As A Feed Source For Juvenile Eastern Oysters,
2025
Georgia Southern University
Using Algal Turf Scrubber Biomass As A Feed Source For Juvenile Eastern Oysters, Taofeek Saka Jimoh
College of Graduate Studies: Theses & Dissertations
Algal turf scrubber (ATS) is an engineered system that promotes natural wastewater treatment processes and improves water quality by passing a shallow stream of nutrient rich water over the surface of a gently sloped flow-way. Algae turf scrubber biomass is a combination of micro and macroalgae, as well as micro-invertebrates, ciliates, bacteria, and more. The overall aim of the study was to reduce the feeding cost of juvenile eastern oysters by replacing the commercial microalgae diet with ATS biomass. The experiment was designed to assess the viability of replacing commercial microalgal diet with ATS biomass at different substitution levels (0, …
Bioresource Management Via Least Cost Feed Formulation For Red Tilapia (Oreochromis Sp.): Application Of Linear Programming Technique,
2024
National Centre for Research and Development of Fisheries and Aquaculture (NCRDFA), Bou-Ismaïl, Algeria
Bioresource Management Via Least Cost Feed Formulation For Red Tilapia (Oreochromis Sp.): Application Of Linear Programming Technique, Boudjema Kamel, Redhouane Benfares, Affaf Kord, Toufik Milla, Belkacem Guenachi, Lynda Frai, Rachida Itcher, Hocine Kherzane
Journal of Bioresource Management
The method of linear programming (LP) was utilized to determine the relationship between the composition of nutrients of each ingredients, specifications for raw materials, cost and requirements for nutrients of the red tilapia (Oreochromis sp.), in order to define: (1) least cost ration formulation, (2) least cost diet, (3) minimum price of producing a particular diet after meeting a number of requirements. The resulting LP models were solved using the simplex algorithm. Therefore, our results show that, formulated feed had high protein content (31.92 %), Lipid (2.53), Moisture (9.10 %) and Ash (9.00 %). The utilization of diet …
From The Ocean To Our Kitchen Table: Anthropogenic Particles In The Edible Tissue Of U.S.. West Coast Seafood Species,
2024
Portland State University
From The Ocean To Our Kitchen Table: Anthropogenic Particles In The Edible Tissue Of U.S.. West Coast Seafood Species, Summer D. Traylor, Elise F. Granek, Marilyn Duncan, Susanne Brander
Environmental Science and Management Faculty Publications and Presentations
Microplastics (MPs) and other anthropogenic particles (APs) are pervasive environmental contaminants found throughout marine and aquatic environments. We quantified APs in the edible tissue of black rockfish, lingcod, Chinook salmon, Pacific herring, Pacific lamprey, and pink shrimp, comparing AP burdens across trophic levels and between vessel-retrieved and retail-purchased individuals. Edible tissue was digested and analyzed under a microscope, and a subset of suspected APs was identified using spectroscopy (μFTIR). Anthropogenic particles were found in 180 of 182 individuals. Finfish contained 0.02–1.08 AP/g of muscle tissue. In pink shrimp (Pandalus jordani), the average AP/g was 10.68 for vessel-retrieved and …
Highway Crossing Rates Of Wild Felids Before, During, And After Wildlife Crossing Structure Installation,
2024
United States Fish and Wildlife Service
Highway Crossing Rates Of Wild Felids Before, During, And After Wildlife Crossing Structure Installation, Sarah E. Lehnen, Mitch Sternberg, Hilary M. Swarts, John H. Young Jr., Victoria Hanley, Richard J. Kline
School of Earth, Environmental, & Marine Sciences Faculty Publications
In an environment increasingly dominated by roads, wildlife crossing structures (WCS) have been installed to decrease wildlife mortality and improve habitat linkages. In South Texas, vehicle collisions have been a major mortality source for the endangered ocelot ( Leopardus pardalis ). To mitigate threats to this species, eight WCS, along with associated fencing, were strategically placed along Farm‐to‐Market Road 106 (FM106), which passes through ocelot habitat. We assessed the rate of on‐roadway crossings and WCS use by GPS‐collared animals before, during, and after WCS installation using camera traps to verify WCS use. Because of the rarity of ocelots in this …
