Characterizing The Response Of The Coastal Rio Grande To Upstream Damming,
2023
The University of Texas Rio Grande Valley
Characterizing The Response Of The Coastal Rio Grande To Upstream Damming, Timothy A. Goudge, John M. Swartz, Tian Y. Dong, David Mohrig
School of Earth, Environmental, & Marine Sciences Faculty Publications
Dams are major obstructions to the flow of water and the transport of sediment in rivers. Much work has shown the construction of dams, and storage of sediment in reservoirs, can lead to significant changes in the morphodynamic behavior of alluvial rivers; however, in most cases, the effect of damming has a finite downstream limit as sediment is supplied back to the river through channel bed/bank erosion and/or tributary inputs. Here we present a study of a natural experiment that isolates one source of sediment downstream of a dam – the lower Rio Grande, which has no major tributary inputs …
Effects Of Various Dietary Carbohydrate Sources On The Growth Performance And Body Composition Of The Dog Conch, Laevistrombus Canarium,
2023
Department of Aquatic Biosciences, National Chiayi University, Chiayi, 600, Taiwan
Effects Of Various Dietary Carbohydrate Sources On The Growth Performance And Body Composition Of The Dog Conch, Laevistrombus Canarium, Jen-Hong Chu
Journal of Marine Science and Technology–Taiwan
This study investigates the effects of dietary supplementation with various carbohydrate sources on the growth and dietary nutrient utilization efficiency of a 0.72-g dog conch, Laevistrombus canarium. Five treatment diets had supplementation with alpha-starch (Sta), dextrin (Dex), pullulan gum (Pg), xanthan gum (Xg), and carboxymethyl cellulose (CMC). At the end of the feeding trial, the best growth performance (weight gain, 442.23%) and diet efficiency (protein efficiency ratio, 1.25, and feed conversion ratio [FCR], 2.04) were exhibited by the dog conch fed the Sta diet, whereas the lowest growth performance was observed in the dog conch fed the Xg and CMC …
Cost Advantages Of Far East/Europe Trunk Route Deployment With Port Selection In East Asia,
2023
Department of Shipping and Transportation Management, Dean of Marine Science and Technology, National Kaohsiung University of Science and Technology, Taiwan
Cost Advantages Of Far East/Europe Trunk Route Deployment With Port Selection In East Asia, Tai Hui-Huang, Chang Chin-Wei
Journal of Marine Science and Technology–Taiwan
To cater to the gradually increasing sizes of ships, several traditional container ports in East Asia built deep-water wharves to attract shipping carriers to berth, a decision that is considered highly reasonable because it allows for shipping carriers to gain a cost advantage. For traditional Far East/Europe (F/E) trunk routes, shipping carriers must deploy vessels that are large enough at hub ports to maintain low transshipment costs. However, for a port to attract shipping carriers, it should be able to first meet the cargo demand of these carriers. The port would also need to improve the loading ratio to enjoy …
Influence Of Vacuum Condition On Rapid Chloride Migration (Rcm) Test For Chloride Penetration Resistance Of Concrete,
2023
Department of Harbor and River Engineering, National Taiwan Ocean University, 2 Pei-Ning Road, Keelung 20224, Taiwan
Influence Of Vacuum Condition On Rapid Chloride Migration (Rcm) Test For Chloride Penetration Resistance Of Concrete, Chih-Yen Lin, Chun-Fu Chang, Chung-Chia Yang
Journal of Marine Science and Technology–Taiwan
NT Build 492 regulates that the pressure be set at 7.5–37.5 torr and be maintained for 3 h for vacuum processing. This large range of acceptable vacuum pressure is awkward for research, and 3 h of pump-down time may be excessive. In this study, vacuum conditions were divided into vacuum pressure and pump-down time groups: various vacuum pressures and pump-down times were used to preprocess specimens to explore the effect of vacuum conditions on the RCM test. The salt ponding test was also conducted to identify the optimal vacuum conditions. It is shown that the relationship between vacuum pressure and …
Exhaust Noise Elimination Using Silencers Fortified With Perforated Tubes, Extended Tubes, Penetrable Resin Inlet And Orifice Plate,
2023
Department of Mechanical and Materials Engineering, Tatung University, ROC
Exhaust Noise Elimination Using Silencers Fortified With Perforated Tubes, Extended Tubes, Penetrable Resin Inlet And Orifice Plate, Min-Chie Chiu, Ho-Chih Cheng
Journal of Marine Science and Technology–Taiwan
Pneumatic equipment in marine diesel engine and associated piping system often emit extremely high level of noises when releasing pressure. Concerning the crew’s hearing health, discovering an efficient noise silencing device becomes essential. A silencer fortified with extended tubes, perforated tubes, orifice plate, and penetrable resin inlet is presented in order to competently dampen the blown-up noises. A simplified objective function by means of FEM, Artificial Neural Networks (ANNs), and a Genetic Algorithm (GA) is established to enable the numerical calculation when using a finite element method. Three silencer designs, silencer A (with element A, a penetrable resin inlet), B …
Deep Learning–Based, Oceantdlx Sea Ice Detection Model For Sar Image,
2023
Shandong University of Science and Technology, Qingdao, China.
Deep Learning–Based, Oceantdlx Sea Ice Detection Model For Sar Image, Liu Lin, Li Wanwu, Li Hang, Sun Yi
Journal of Marine Science and Technology–Taiwan
This study constructs four deep-learning OceanTDLx series models and uses a WinR-AdaGrad gradient descent algorithm to train and optimize the constructed models. Through an analysis of the loss, accuracy, and time consumption of the four models (i.e., OceanTDL2, OceanTDL3, OceanTDL5 and OceanTDL8), we reveal that the models’ performance does not improve when the number of layers is increased and that OceanTDL5 provides the optimal performance. OceanTDL5 is compared with OceanTDA9 (a model that we previously constructed), and the curves for training loss_batch and training accuracy_batch indicate that OceanTDL5 is more suitable than OceanTDA9 for detecting distributed targets, particularly semi-melted sea …
Application Of Unmanned Aerial Vehicle–Based Infrared Images In Determining Characteristics Of Sea Surface Temperature Distribution,
2023
Assistant Professor, Department of Shipping Technology, College of Maritime, National Kaohsiung University of Science and Technology
Application Of Unmanned Aerial Vehicle–Based Infrared Images In Determining Characteristics Of Sea Surface Temperature Distribution, Hsing-Yu Wang, Hui-Ming Fang, Yun-Chih Chiang
Journal of Marine Science and Technology–Taiwan
This study investigated the temperature field of a body of water by using rotary-wing unmanned aerial vehicles (DJI Mavic 2 Enterprise Dual) comprising visible light and infrared cameras to determine sea temperature distribution. With a flight height of 150 m, image overlap of 80%, and image resolution of 4.75 cm/pixel, the proposed method was more effective than the conventional portable conductivity–temperature–depth device in rapidly measuring sea surface temperature and determining sea temperature distribution. The discharged heated water of the Hoping Power Plant traveled 100–330 m from the wastewater outfall and then gradually diffused in the range of 100–490 m before …
Kerstetter Et Al. Supplemental Materials,
2023
Nova Southeastern University
Kerstetter Et Al. Supplemental Materials, David Kerstetter, Garrett A. Hardy, L. John
Marine & Environmental Sciences Faculty Datasets
This document provides additional photographs to the Kerstetter et al. main text from baited game camera placements in West Lake Park, Broward County, Florida (USA) from January 2019 through January 2020.
Air Pollution In South Texas: A Short Communication Of Health Risks And Implications,
2023
The University of Texas Rio Grande Valley
Air Pollution In South Texas: A Short Communication Of Health Risks And Implications, Sai Deepak Pinakana, Esmeralda Mendez, Ismaila Ibrahim, Md. Salahuddin Majumder, Amit U. Raysoni
School of Earth, Environmental, & Marine Sciences Faculty Publications
Air pollution is a major public health concern. The region of South Texas in the United States has experienced high levels of air pollution in recent years due to an increase in population, cross-border trade between the U.S.A. and Mexico, and high vehicular activity. This review assesses the relationships between human health and air pollution in South Texas. A thorough scientific search was performed using PubMed, Science Direct, and ProQuest, with most of the literature focusing on the source apportionment of particulate matter that is 2.5 microns or less in width (PM2.5), Carbon Dioxide (CO2), carbon monoxide (CO), Black Carbon …
Habitat Use Of Gulf Sturgeon (Acipenser Oxyrinchus Desotoi) In Pascagoula River Holding Areas And In Estuarine And Marine Environments Including Ship Island, Mississippi And Mobile Bay, Alabama,
2023
The University of Southern Mississippi
Habitat Use Of Gulf Sturgeon (Acipenser Oxyrinchus Desotoi) In Pascagoula River Holding Areas And In Estuarine And Marine Environments Including Ship Island, Mississippi And Mobile Bay, Alabama, Elizabeth M. Greenheck
Master's Theses
Gulf Sturgeon (GS) are a federally threatened, anadromous species that inhabit coastal rivers in the northern Gulf of Mexico and make annual migrations between riverine and marine habitats. They are divided into western or an eastern river systems based on the location of their natal river relative to Mobile Bay. Tracking of GS movements using acoustic telemetry has occurred since the late 1990s but has increased in use since 2015 for monitoring important habitats that GS rely on throughout their lifetime. For this study, tagged GS were monitored in three areas throughout the central Gulf of Mexico: the Mobile Bay …
Margalefidinium Polykrikoides Cyst Resuspension In The Lafayette River, A Sub-Tributary Of The Chesapeake Bay,
2023
Old Dominion University
Margalefidinium Polykrikoides Cyst Resuspension In The Lafayette River, A Sub-Tributary Of The Chesapeake Bay, Gabrielle Greaney, Eduardo Perez Vega, Katherine Crider, Dreux Chappell, Kimberly Powell, Richard Hale, Peter Bernhardt, Margaret Mulholland
Undergraduate Research Symposium
Harmful Algal Blooms are a collection of algae in a body of water that can cause serious environmental issues and health problems in both people and aquatic organisms. Dinoflagellates are microscopic, unicellular, and eukaryotic organisms that are well known for forming harmful algal blooms because of eutrophication. Coastal Virginia suffers from HABs in the Chesapeake Bay and its tributaries. A common species of dinoflagellate, known as Margalefidinium polykrikoides exists in the Chesapeake Bay. The purpose of this study is to determine if sediment resuspension produced by wind generated surface gravity waves cause cysts (dinoflagellate resting stages) to be suspended into …
Using California Harmful Algae Risk Mapping To Predict Sea Lion Strandings,
2023
Pepperdine University
Using California Harmful Algae Risk Mapping To Predict Sea Lion Strandings, Florybeth La Valle, Sydney Socquet
Seaver College Research And Scholarly Achievement Symposium
Domoic acid (DA) is a toxin produced by marine diatoms of the genus Pseudo-nitzschia (Pn) and bioaccumulates in California sea lions (Zalophus californianus). DA toxicosis can cause neurological issues and death, and the rate at which Z. californianus become stranded due to this condition has been increasing since it was first diagnosed in a marine mammal in 1998. We compared geotemporal data of sea lion strandings with data from the California Harmful Algae Risk Mapping (C-HARM) Model to analyze patterns that may indicate when and where a sea lion stranding due to DA toxicosis will occur. C-HARM geographically visualizes the …
Health And Safety Effects Of Airborne Soil Dust In The Americas And Beyond,
2023
The University of Texas Rio Grande Valley
Health And Safety Effects Of Airborne Soil Dust In The Americas And Beyond, Daniel Q. Tong, Thomas E. Gill, William A. Sprigg, Robert Scott Van Pelt, Alexander Baklanov, Bridget Marie Barker, Jesse E. Bell, Juan Castillo, Santiago Gassó, Cassandra Gaston, Amit U. Raysoni
School of Earth, Environmental, & Marine Sciences Faculty Publications
Risks associated with dust hazards are often underappreciated, a gap between the knowledge pool and public awareness that can be costly for impacted communities. This study reviews the emission sources and chemical, physical, and biological characteristics of airborne soil particles (dust) and their effects on human and environmental health and safety in the Pan-American region. American dust originates from both local sources (western United States, northern Mexico, Peru, Bolivia, Chile, and Argentina) and long-range transport from Africa and Asia. Dust properties, as well as the trends and interactions with criteria air pollutants, are summarized. Human exposure to dust is associated …
Movement, Behavior, And Trophic Ecology Of A Pelagic Predator Guild In The Eastern Tropical Pacific Ocean,
2023
Guy Harvey Research Institute
Movement, Behavior, And Trophic Ecology Of A Pelagic Predator Guild In The Eastern Tropical Pacific Ocean, Ryan Keith Logan
All HCAS Student Capstones, Theses, and Dissertations
Pelagic apex predators exert strong influences on ecological communities, and often support valuable commercial or recreational fisheries worldwide. Yet, due to their rarity and pelagic lifestyle, many species, such as billfishes, have proven particularly difficult to study at resolutions necessary to define dynamics of recovery from fishery interaction, physical interaction with environmental features and prey exploitation, and competitive interactions among other billfish predators. This leads to a paucity of knowledge on billfish ecology and habitat use, and hinders management efforts. With the ever-improving and miniaturization of technology and oceanographic datasets, the ability to define and quantify these interactions of fish …
Epidermal Threads Reveal The Origin Of Hagfish Slime,
2023
Chapman University
Epidermal Threads Reveal The Origin Of Hagfish Slime, Yu Zeng, David C. Plachetzki, Kristen Nieders, Hannah Campbell, Marissa Cartee, M. Sabrina Pankey, Kennedy Guillen, Douglas Fudge
Biology, Chemistry, and Environmental Sciences Faculty Articles and Research
When attacked, hagfishes produce a soft, fibrous defensive slime within a fraction of a second by ejecting mucus and threads into seawater. The rapid setup and remarkable expansion of the slime make it a highly effective and unique form of defense. How this biomaterial evolved is unknown, although circumstantial evidence points to the epidermis as the origin of the thread- and mucus-producing cells in the slime glands. Here, we describe large intracellular threads within a putatively homologous cell type from hagfish epidermis. These epidermal threads averaged ~2 mm in length and ~0.5 μm in diameter. The entire hagfish body is …
Age, Growth And Maturity Of The Yellow Stingray (Urobatis Jamaicensis), A Biannually Reproductive Tropical Batoid.,
2023
Nova Southeastern University
Age, Growth And Maturity Of The Yellow Stingray (Urobatis Jamaicensis), A Biannually Reproductive Tropical Batoid., Jessica Schieber, Daniel P. Fahy, John K. Carlson, David W. Kerstetter
Marine & Environmental Sciences Faculty Articles
Urobatis jamaicensis is a coastal batoid species affected by habitat loss and small-scale exploitation from fisheries and the aquarium trade, yet the life-history information available is limited. This is the first study to assess the vertebral centra from 195 stingrays to estimate age and growth patterns and compare them with the biannual reproductive pattern previously reported for this species. Age-at-size data were compared using five different growth models and found a two-parameter von Bertalanffy growth function (VBGF), the Gompertz model, and a modified VBGF fit best for males, females and sexes combined, respectively. Maturity was achieved before one year. However, …
Black Crowned Night Heron,
2023
Nova Southeastern University
Black Crowned Night Heron, Kevin Rafferty, Briana K. Zaffiro, David Kerstetter
All Scans: Kerstetter Fisheries and Avian Ecology 3D Scan Series
No abstract provided.
Ycnh 3d Skull,
2023
Nova Southeastern University
Ycnh 3d Skull, Kevin Rafferty, Briana K. Zaffiro, David Kerstetter
All Scans: Kerstetter Fisheries and Avian Ecology 3D Scan Series
No abstract provided.
Mafr 3d Skull,
2023
Nova Southeastern University
Mafr 3d Skull, Kevin Rafferty, Briana K. Zaffiro, David W. Kerstetter
All Scans: Kerstetter Fisheries and Avian Ecology 3D Scan Series
3D Scan of a Magnificent Frigatebird
Rosp 3d Skull (Roseate Spoonbill),
2023
Nova Southeastern University
Rosp 3d Skull (Roseate Spoonbill), Kevin Rafferty, Briana K. Zaffiro, David Kerstetter
All Scans: Kerstetter Fisheries and Avian Ecology 3D Scan Series
3D skull of a roseate spoonbill
