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Articles 31 - 60 of 210
Full-Text Articles in Marine Biology
Beyond Better Conditions: Seaweed Farming And The Number Of Sentient Animals In Aquaculture, Shrilaxmi Patil, Matthew Unerman, Wasseem Emam
Beyond Better Conditions: Seaweed Farming And The Number Of Sentient Animals In Aquaculture, Shrilaxmi Patil, Matthew Unerman, Wasseem Emam
Animal Sentience
Oldfield & Bonano (2024) (O&B) document how far fish welfare research lags behind welfare research in other animals. We share O&B’s feelings-based concept of welfare and agree that aquaculture seeded this field; but research volume has not scaled with animal numbers: Welfare attention per farmed fish or decapod remains negligible. Along the lines of preceding commentaries (Maia 2024, Mather 2024), we treat farmed aquatic animals as individuals rather than tonnage. We then raise a point so far absent from the commentary on O&B so far: reducing the number of sentient animals entering intensive systems. Coastal seaweed farming, which cultivates non-sentient …
Pathways For Coordinating High-Quality Exploitation Of Marine Resources And High-Level Protection Of Marine Ecosystems, Jianping Yin, Peimin Duan, Si Zhang
Pathways For Coordinating High-Quality Exploitation Of Marine Resources And High-Level Protection Of Marine Ecosystems, Jianping Yin, Peimin Duan, Si Zhang
Bulletin of Chinese Academy of Sciences (Chinese Version)
The ocean serves as a vital strategic space and a reservoir of resources essential for human survival and development, offering robust support for socioeconomic progress. Simultaneously, as a critical component of the Earth’s ecological environment, the ocean plays a pivotal role in regulating climate change, conserving biodiversity, and maintaining ecological balance. In recent years, China has continuously intensified the exploitation and utilization of marine resources, with the growth of the marine economy injecting blue momentum into the nation’s development. Nevertheless, the long-term, high-intensity exploitation of offshore resources, coupled with the ongoing advancement into deep-sea resource development, has led to frequent …
Land-Use Transitions And Carbon Emissions Of Aquaculture Expansion In The Brazilian Amazon, Felipe S. Pacheco, Sebastian A. Heilpern, Rafael M. Almeida, Suresh A. Sethi, Marcela Miranda, Nicholas Ray, Laura Greenstreet, Joshua Fan, Brendan H. Rappazzo, Marcelo Gomes Da Silva
Land-Use Transitions And Carbon Emissions Of Aquaculture Expansion In The Brazilian Amazon, Felipe S. Pacheco, Sebastian A. Heilpern, Rafael M. Almeida, Suresh A. Sethi, Marcela Miranda, Nicholas Ray, Laura Greenstreet, Joshua Fan, Brendan H. Rappazzo, Marcelo Gomes Da Silva
School of Earth, Environmental, & Marine Sciences Faculty Publications
Accounting for land-use change underlying food sector expansion is critical for conserving ecosystem integrity. This challenge is particularly acute in the Amazon, where the conversion of forests for food production is pronounced and has broad implications for global biodiversity and the cycling of water and carbon. Here, we analyze land-use transitions associated with aquaculture development in the Brazilian Amazon. We found that a 450-fold increase in aquaculture pond area from 1985 to 2022 occurred primarily on pasturelands (87%) but also included wetland conversion (4%) and deforestation (5%). Notably, continued growth can be sustained within already altered landscapes: In Rondônia, the …
Changes In Water Quality And Microbiota Over Two Years In Florida Hard Clam (Mercenaria Mercenaria) Hatcheries, Bonnie Getter
Changes In Water Quality And Microbiota Over Two Years In Florida Hard Clam (Mercenaria Mercenaria) Hatcheries, Bonnie Getter
Electronic Theses and Dissertations
This thesis characterized the water quality and bacterial communities in nine hard clam hatcheries over two production years through weekly or biweekly water quality and chemistry monitoring, monthly bacterial plating in the second year of production, and select 16S microbiome sampling at select hatcheries to address production bottlenecks and support the reliable production of high-quality seed for Florida’s growing hard clam aquaculture industry. Logistic regression models showed that water source was distinguished by pH, salinity, alkalinity, and nitrite, whereas geographic location was distinguished by temperature, salinity, nitrate, and calcium; temperature, dissolved oxygen, salinity, and alkalinity distinguished seasons. Vibrio bacteria differed …
Why Technical Readiness Is Not Enough: Institutional Barriers To Full Harvest Strategy Adoption In The International Pacific Halibut Commission, Evelyn Roozee, Owen Temby, Gordon M. Hickey
Why Technical Readiness Is Not Enough: Institutional Barriers To Full Harvest Strategy Adoption In The International Pacific Halibut Commission, Evelyn Roozee, Owen Temby, Gordon M. Hickey
School of Earth, Environmental, & Marine Sciences Faculty Publications
Harvest strategies are increasingly promoted as a mechanism to reduce political discretion and align fisheries management with pre-agreed scientific objectives. While substantial progress has been made in tuna regional fisheries management organizations (RFMOs), non-tuna RFMOs have lagged behind. Existing research has focused primarily on technical modeling challenges, with comparatively limited attention to the governance dynamics shaping adoption. Using the International Pacific Halibut Commission (IPHC) as an instrumental case study, we examine the progress and delays in the development of a harvest strategy policy (HSP) through semi-structured interviews and participant observation. We find that the IPHC successfully addressed commonly cited barriers, …
A Comparison Of Survival, Growth, And Stress Resilience In Three Different Lineages Of The Pacific Oyster (Crassostrea Gigas) Farmed On The California Central Coast, Victoria F. Hanshaw
A Comparison Of Survival, Growth, And Stress Resilience In Three Different Lineages Of The Pacific Oyster (Crassostrea Gigas) Farmed On The California Central Coast, Victoria F. Hanshaw
Master's Theses
Aquaculture of Pacific oysters on the US West Coast is routinely impacted by seasonal unexplained mortality events. To better understand these large-scale mortality events in oyster aquaculture, shellfish growers and scientists in California have partnered together to conduct comparative, multi-estuary farm trials of discrete Pacific oyster (Crassostrea gigas) lineages. In this thesis we investigate how the more recently imported Midori lineage performs compared to the historically used Miyagi lineage, as well as a Hybrid (Midori x Miyagi) lineage. As part of a 7-month long field study from April-November of 2024 in Morro Bay and Tomales Bay, California, we evaluated …
Blue Crab Reproductive Output And Phenology In A Changing Climate, Blaise Rohan
Blue Crab Reproductive Output And Phenology In A Changing Climate, Blaise Rohan
Master's Theses
Globally, ecosystems are experiencing rising temperatures due to climate change, with potential consequences for reproductive investment and timing in many species. Blue crabs, Callinectes sapidus, support valuable commercial fisheries throughout the U.S. Atlantic and Gulf coasts, and understanding variation in reproductive output has important management and conservation implications. This study examined two components of blue crab reproduction: (1) reproductive investment across populations spanning multiple latitudes (New York, New Jersey, North Carolina, Mississippi, and Texas), using a space-for-time substitution to assess the effects of varying thermal regimes on fecundity and egg quality, and (2) spawning phenology in North Carolina from …
Environmental Dna For Endangered Freshwater Mussel Monitoring: A Review On Global Synthesis Of Edna Methods, Challenges, And Innovative Strategies, Mizanur Rahman, Md. Saydur Rahman, Richard J. Kline
Environmental Dna For Endangered Freshwater Mussel Monitoring: A Review On Global Synthesis Of Edna Methods, Challenges, And Innovative Strategies, Mizanur Rahman, Md. Saydur Rahman, Richard J. Kline
School of Earth, Environmental, & Marine Sciences Faculty Publications
Freshwater mussels (family Unionidae) are among the most endangered aquatic species worldwide, making effective monitoring vital for their conservation. Traditional surveys are laborious, time-consuming, and often miss rare or low-density populations. Environmental DNA (eDNA) is a highly sensitive, non-invasive approach for freshwater mussel detection and monitoring; however, uncertainties in ecological interpretation continue to limit its broader application in freshwater biodiversity monitoring. We conducted a systematic review of 49 peer-reviewed studies, identified through an extensive literature search, to assess temporal research trends, methodological advancements, ecological contexts, and regulatory readiness of freshwater mussel eDNA monitoring. Findings show that freshwater mussel eDNA research …
Using A Cell Flux Model To Investigate Phytoplankton Growth And Macromolecular Allocation Under Iron Limitation, Margaret Bernish, Meng Gao, Jongsun Kim, Benoit Pasquier
Using A Cell Flux Model To Investigate Phytoplankton Growth And Macromolecular Allocation Under Iron Limitation, Margaret Bernish, Meng Gao, Jongsun Kim, Benoit Pasquier
School of Earth, Environmental, & Marine Sciences Faculty Publications
Global biogeochemical models are powerful tools used to interpret observations and empirical data, create hypotheses, and make predictions. Many of these models, however, represent marine microbes as static stoichiometric reactions that convert nutrients into biomass. To better constrain the biological processes that control nutrient cycling in the global ocean, we extend the Cell Flux Model of Phytoplankton to explore the impact of dissolved iron concentration on the allocation of macromolecules and elemental ratios within phytoplankton cells. This model is supported by data obtained from a range of incubation experiments conducted with phytoplankton of varying species and size categories. Model output …
Reel Into Fishing!: Providing A Recreational Fishing Education Program For Youth, Amelia Valente, Douglas R. Zemeckis, Lisa Morse, Gene Nigro
Reel Into Fishing!: Providing A Recreational Fishing Education Program For Youth, Amelia Valente, Douglas R. Zemeckis, Lisa Morse, Gene Nigro
Journal of Extension
New Jersey is known as the Garden State, but with over 130 miles of Atlantic coastline, it also has very productive marine ecosystems that offer numerous opportunities for recreational marine fishing. The International Game Fish Association, a nonprofit organization committed to the conservation of game fish and the promotion of responsible, ethical angling practices, collaborated with Rutgers Cooperative Extension to host a youth educational program entitled Reel Into Fishing! The objective is to educate participants through hands-on engagement on ethical fishing practices and marine science to help develop the next generation of responsible anglers.
Exploring Immune Priming In The Species Exaiptasia Diaphana, Torrence Campos
Exploring Immune Priming In The Species Exaiptasia Diaphana, Torrence Campos
Biology Theses
Vibrio coralliilyticus is a pathogen that infects various coral species across several reef ecosystems and causes mortality within a span of a few days. With increasing temperatures, the pathogen becomes more virulent towards coral. Probiotics such as MCH1-7 have previously been used to treat infected corals before and after exposure to V. coralliilyticus. In this study, we will be using a species of sea anemone Exaiptasia diaphana in place of coral to evaluate the effects of two V. coralliilyticus strains ATCC BAA-450 and OFT6-21. It was determined that BAA-450 was more virulent. It led to immediate stress and higher mortality. …
An Emergent Seafood Nationalism Takes Hold In The United States, Owen Temby
An Emergent Seafood Nationalism Takes Hold In The United States, Owen Temby
School of Earth, Environmental, & Marine Sciences Faculty Publications
This paper introduces the concept of ‘seafood nationalism’ to describe how, since 2024–2025, the United States increasingly uses tariffs, trade remedies, food safety enforcement and origin-based rules to favour American seafood over foreign products. Federal actions include Executive Order 14276, Restoring American Seafood Competitiveness, which directs agencies to address unfair trade practices, unsafe imports and to develop a coordinated seafood trade strategy. Additional measures include a tariff package imposing a 10% duty on nearly all seafood imports and 30% on seafood from China, as well as new anti-dumping and countervailing duty orders on warm-water shrimp. This paper presents Gulf …
Essential And Non-Essential Amino Acid Composition Of Hilsa (Tenualosa Ilisha) Fish In Different Fishing Regions Of Bangladesh, Mohajira Begum, Md. Moshfekus Saleh-E-In, Md. Zia Uddin Al Mamun, Umma Fatema Shahjadee, Farha Matin Juliana, Md. Sabir Hossain
Essential And Non-Essential Amino Acid Composition Of Hilsa (Tenualosa Ilisha) Fish In Different Fishing Regions Of Bangladesh, Mohajira Begum, Md. Moshfekus Saleh-E-In, Md. Zia Uddin Al Mamun, Umma Fatema Shahjadee, Farha Matin Juliana, Md. Sabir Hossain
Journal of King Abdulaziz University: Marine Science
Hilsa, Tenualosa ilisha (Hamilton, 1822), is one of the favourite and popular tropical fish in the people of South-East Asia due to its delicious taste and flavour. This study investigates the comprehensive amino acid profiles of various fishing locations of Bangladesh to assess the protein quality and nutritional values. Fourteen free amino acids were identified from the six riverine locations of Bangladesh. The total free amino acid (TAA) contents were ranged from 11.60 g/100 g in Cox's Bazar to 13,40 g/100 g in Kirtonkhola for raw fish. In the case of smoked treated, the TAA ranged from 14.01 g/100 g …
Operational Risk Assessment Of Ship To Shore Petroleum Transfer Using Fuzzy Rule-Based Bayesian Networks, Ayman F. Alghanmi
Operational Risk Assessment Of Ship To Shore Petroleum Transfer Using Fuzzy Rule-Based Bayesian Networks, Ayman F. Alghanmi
Journal of King Abdulaziz University: Marine Science
Petroleum ports represent critical infrastructure in global energy supply chains, where operational risks during ship-to-shore transfer operations can lead to catastrophic consequences including environmental damage and human casualties. Despite rigorous safety protocols, these facilities remain vulnerable to operational hazards in dynamic maritime environments. This research aimed to develop and apply a hybrid Fuzzy Rule-Based Bayesian Reasoning (FRBBR) model to identify, evaluate, and prioritize operational hazards during crude oil transfer operations at petroleum port berths, with a case study conducted in Saudi Arabia, addressing the challenge of risk assessment where historical data is limited.
The research employed a mixed-methods approach combining …
Revolutionizing Coral Research: The Power Of Holo-Omics, Mohammad M. Binsarhan
Revolutionizing Coral Research: The Power Of Holo-Omics, Mohammad M. Binsarhan
Journal of King Abdulaziz University: Marine Science
This mini-review highlights the emerging field of holo-omics and its application in unraveling the complex dynamics of the coral holobiont. Corals exist as meta-organisms, closely interacting with a diverse microbiota including bacteria, archaea, microeukaryotes, viruses, and algal symbionts. Understanding these intricate relationships is critical for assessing coral health, stress responses, and resilience to environmental change. We explore the application of meta-omics approaches such as metabarcoding, metagenomics, meta-transcriptomics, metabolomics, and proteomics in profiling coral-associated microbial communities and their functions. The review sheds light on the methodological advantages and limitations of each approach, as well as some of the technical challenges involved …
Microalgae As Sustainable Biofactories For Bioplastic Production: Challenges And Future Perspectives: A Review, Zahraa Hussein Obaid, Noor S. Naji, Jasim M. Salman, Layla Mustafa A.A. Alkatrani
Microalgae As Sustainable Biofactories For Bioplastic Production: Challenges And Future Perspectives: A Review, Zahraa Hussein Obaid, Noor S. Naji, Jasim M. Salman, Layla Mustafa A.A. Alkatrani
Journal of King Abdulaziz University: Marine Science
The widespread use of traditional plastics, combined with their slow breakdown, has exacerbated environmental and health problems. Therefore, it has become imperative to find alternatives. Due to their simplicity of cultivation, quick growth, tolerance to challenging growing conditions, and low cost, microalgae are being used more frequently as a bio-source for bioplastics lately. Additionally, a variety of biopolymers, including polyhydroxybutyrate, polylactic acid (PLA), starch, polyhydroxyalkanoates (PHA), protein, and cellulose, could be produced by microalgae. These polymers show promising qualities including biodegradability, biocompatibility, and non-toxicity under various cultivation conditions. The purpose of this study is to demonstrate the potential of microalgae …
Magnetically Treated Water: Enhancing Stocking Density, Water Quality, And Growth In Nile Tilapia (Oreochromis Niloticus), Mortada M. A. Hussein, Ayatollah A. H. Abd-El Said, Asmaa N. Mohammed, Fatma M. M. Korni
Magnetically Treated Water: Enhancing Stocking Density, Water Quality, And Growth In Nile Tilapia (Oreochromis Niloticus), Mortada M. A. Hussein, Ayatollah A. H. Abd-El Said, Asmaa N. Mohammed, Fatma M. M. Korni
Journal of King Abdulaziz University: Marine Science
This study aimed to explore the potential of using magnetic treated water (MTW) to increase stocking densities of growing Nile tilapia, Oreochromis niloticus, in storage, productive, and/or rearing holding facilities with limited mortality and water loss. The experimental period was 12 weeks, with 1500 O. niloticus fingerlings acclimated with maintained water parameters. After acclimation, 1350 were randomly selected and used for experiment setting up, including its triplicates. For each replicate, 225 fingerlings were distributed in three experimental tanks of MTW units as group set A, B and C, each received 50, 75, and 100 fingerlings, respectively. Besides, 225 fingerlings …
Environmental Assessment Of The Shatt Al-Basra Canal: Petroleum Hydrocarbons, Heavy Metals And Water Quality, Mohammed A. Jasim Aldoghachi, Bassam A. B. Alabdul Aziz, Shurooq Al-Mosawi
Environmental Assessment Of The Shatt Al-Basra Canal: Petroleum Hydrocarbons, Heavy Metals And Water Quality, Mohammed A. Jasim Aldoghachi, Bassam A. B. Alabdul Aziz, Shurooq Al-Mosawi
Journal of King Abdulaziz University: Marine Science
The environmental assessment of the Shatt al-Basra Canal in the area of the regulatory was studied. Petroleum hydrocarbons and heavy elements (cobalt (Co), zinc (Zn), lead (Pb), cadmium (Cd), and chromium (Cr)) in the waters of this area were analyzed. In addition, some water quality characteristics were evaluated (salinity, total dissolved solids (TDS), pH, oxygen, biological oxygen demand (BOD5), chemical oxygen demand (COD), nitrate (NO3-), nitrite (NO2-), phosphate (PO4 -3), and ammonia (NH3). Petroleum hydrocarbons had been recorded in studied area and dominated with medium-chain alkanes, namely decane …
Impacts Of Coastal Development And Tourism On Fisheries And Aquatic Biodiversity Of The Red Sea: A Review, Lafi S. Al Solami
Impacts Of Coastal Development And Tourism On Fisheries And Aquatic Biodiversity Of The Red Sea: A Review, Lafi S. Al Solami
Journal of King Abdulaziz University: Marine Science
The Red Sea boasts a diverse coastal environment, unique coral reef biodiversity, and fisheries that support rapidly growing marine tourism. Its excellent tourism facilities make it a popular destination. However, intensive tourist activities such as swimming, boating, diving, and fishing have a negative impact on the coastal and marine ecosystem. Additionally, in line with Vision 2030, Saudi Arabia has launched mega projects along the Red Sea coast, increasing tourist activity and leading to human intrusion into critical yet vulnerable marine ecosystems like coral reefs, fish, sea grass beds, and mangrove stands. With the rise in tourism activities and disruptions to …
Coastal Landforms Analysis Of Al-Kharrar Lagoon And Rabigh Coast Using Aster (Ast_L1t) Imagery, Western Saudi Arabia, Omar A. Alharbi
Coastal Landforms Analysis Of Al-Kharrar Lagoon And Rabigh Coast Using Aster (Ast_L1t) Imagery, Western Saudi Arabia, Omar A. Alharbi
Journal of King Abdulaziz University: Marine Science
The current study sought to examine the coastal geomorphology throughout the entire length of the Al-Kharrar Lagoon, in addition to the coastal region of Rabigh City, situated on the western coast of Saudi Arabia. The mechanisms underlying the formation of the wide variety of natural land features were also studied. These include sandy, pebble and rocky beaches and sand dunes; intertidal areas; salt flats (sabkhas) and marshes; elevated, terraced or fringing coral reefs; water inlets; and the deposition of terrigenous or alluvial materials, all reflecting the swift transformation that has impacted the region. Evaluation of the ASTER (AST_L1T) data enabled …
The Influence Of Reef Shape On The Fish Community Structure Around Coral Reefs Off Jeddah Coast, Red Sea, Kingdom Of Saudi Arabia, Safaa Alowaidi, Lara Aljarafi, Lina Aloufi, Zekra Albeishi, Fay Al-Salem, Lama Alnebehi, Mohamed Abu El-Regal
The Influence Of Reef Shape On The Fish Community Structure Around Coral Reefs Off Jeddah Coast, Red Sea, Kingdom Of Saudi Arabia, Safaa Alowaidi, Lara Aljarafi, Lina Aloufi, Zekra Albeishi, Fay Al-Salem, Lama Alnebehi, Mohamed Abu El-Regal
Journal of King Abdulaziz University: Marine Science
The purpose of this study is to investigate the effect of the reef profile on the associated fish community. Two stations with different reef shape and depth, Bayada and Abotair islands located off Jeddah coast on the Saudi Arabian Red Sea were studied. The reef check was used to determine the proportion of hard coral, soft coral, algae, and other benthic components. A 20 m long by 5 m belt was used to determine the number and colonies and genera of hard and soft corals. Fish were counted using the underwater visual census (UVC) technique along a transect that is …
Microplastics Contamination In Marine Environment: Sources And Management Strategies, Aishah Hamdi, Mohammad Oves, Naser Alkenani, Majed Alshaeri
Microplastics Contamination In Marine Environment: Sources And Management Strategies, Aishah Hamdi, Mohammad Oves, Naser Alkenani, Majed Alshaeri
Journal of King Abdulaziz University: Marine Science
Microplastics (MPs) have been identified as emerging global pollutants because of their persistence, mobility, and significant ecological impacts. These particles, which result from the degradation of plastic waste and from various industrial and consumer activities, are now widespread in marine environments. The capacity of MPs to adsorb contaminants and bioaccumulate within food webs increases their ecological and health risks, prompting substantial concern regarding their long-term consequences for marine ecosystems and human health. This review synthesizes current knowledge regarding the composition, sources, transport, mechanisms, and environmental behavior of microplastics (MPs), with particular emphasis on marine systems. In these environments, the persistence …
Multi-Label Seabed Image Classification: A Comparative Study Of Deep Learning And Machine Learning Models, Anis Bel Hadj Hassin, Elyes Omri
Multi-Label Seabed Image Classification: A Comparative Study Of Deep Learning And Machine Learning Models, Anis Bel Hadj Hassin, Elyes Omri
Journal of King Abdulaziz University: Marine Science
This study evaluates the effectiveness of deep learning and machine learning models for classifying seabed images into three ecologically significant categories: algae, rocks, and sand. We investigated five models: ResNet50, VGG16, a custom-designed convolutional neural network (CNN), support vector machines (SVM), and random forests (RF). Deep learning models were fine-tuned on 1259 seabed images, with the custom CNN architecture optimized using depthwise separable convolutions and global average pooling. For SVM and RF, features were extracted using a pre-trained VGG16 network. Class weighting was applied to address potential imbalances in the dataset. The custom CNN achieved the highest validation accuracy (82.01%), …
Microplastic Analysis In Fish Larvae (Family: Gonostomatidae And Myctophidae) From The Banggai Sea, Indonesia, Noer Kholis, Luqman Ilyas Ardito, Luqmanul Hakim, Augy Syahailatua, Agus Saleh Atmadipoera, Rina Zuraida, Tuan Nurul Sabiqah Tuan Anuar, Mufti Petala Patria
Microplastic Analysis In Fish Larvae (Family: Gonostomatidae And Myctophidae) From The Banggai Sea, Indonesia, Noer Kholis, Luqman Ilyas Ardito, Luqmanul Hakim, Augy Syahailatua, Agus Saleh Atmadipoera, Rina Zuraida, Tuan Nurul Sabiqah Tuan Anuar, Mufti Petala Patria
Makara Journal of Science
Microplastic pollution is recognized as a threat to marine ecosystems, yet its impacts on early life stages of mesopelagic fishes remain poorly understood. This study investigated the occurrence and characteristics of microplastic ingestion in fish larvae of the families Myctophidae and Gonostomatidae from the Banggai Sea, Indonesia. Morphometric measurements and microplastic content were analyzed in 40 larvae (20 per family). Gonostomatidae larvae, despite being smaller in total length, exhibited significantly larger mouth widths and ingested more microplastic particles (mean = 3.90 ± 0.72 particles) than Myctophidae (mean = 3.40 ± 0.38 particles). Correlation analysis showed no significant relationships between morphometric …
Ontology-Based Decision Support System For Improving Aquaculture Management, Thuy Thi Thu Pham, Phuong Thi Can, Nga Thi Thanh Ha
Ontology-Based Decision Support System For Improving Aquaculture Management, Thuy Thi Thu Pham, Phuong Thi Can, Nga Thi Thanh Ha
Journal of Marine Science and Technology–Taiwan
Early detection of shrimp diseases is vital for reducing losses and ensuring sustainable aquaculture. In this study, a novel ontology-driven framework for shrimp disease diagnosis that integrates environmental knowledge with machine learning-based image analysis is proposed. An ontology was constructed from a structured dataset of environmental parameters and farm conditions related to shrimp diseases, which formally represents concepts such as farm characteristics, environmental factors, symptoms, and disease types. Two public shrimp image datasets were subsequently used to train convolutional neural networks (ResNet50 and MobileNetV2) for automated disease classification. The predicted disease labels and confidence scores were mapped onto the ontology. …
Case Study On Operational Performance Improvement By Turbocharger Nozzle-Ring Modification In Shipboard Generators, Jong-Hun Im, Mukyeong Kang, Sang-Deuk Lee
Case Study On Operational Performance Improvement By Turbocharger Nozzle-Ring Modification In Shipboard Generators, Jong-Hun Im, Mukyeong Kang, Sang-Deuk Lee
Journal of Marine Science and Technology–Taiwan
Owing to increasingly stringent emission regulations imposed by the International Maritime Organization and rising fuel prices, the demand for enhanced energy efficiency and emission control in marine power systems is increasing. This study presents a case study in which the performance of an aging auxiliary generator is restored by modifying the turbocharger nozzle ring. The vessel, a 12-year-old crude-oil tanker, experienced repeated operational issues with its No. 3 generator. This included elevated exhaust gas temperatures, reduced intake air pressure, and frequent turbocharger surges. To address these challenges, the nozzle-ring blade angle was reduced by approximately 2° using spare components, while …
Towards Sustainable Marine Education: Assessing High School Students’ Understanding Of Conservation Concepts, Cheng-Chieh Chang, Tsuyoshi Sasaki, Ya-Yin Liao, Ling-Ya Hung, Liang-Ting Tsai
Towards Sustainable Marine Education: Assessing High School Students’ Understanding Of Conservation Concepts, Cheng-Chieh Chang, Tsuyoshi Sasaki, Ya-Yin Liao, Ling-Ya Hung, Liang-Ting Tsai
Journal of Marine Science and Technology–Taiwan
This study assesses the concepts of marine resource conservation and sustainability among Taiwanese high school students by developing a Chinese version of the Marine Resources Conservation and Sustainability Scale. Grounded in the cognitive, socio-emotional, and behavioral learning objectives outlined in UNESCO’s Education for Sustainable Development Goals (ESDGs), the scale targets students aged 16 to 18 to examine gender differences in marine knowledge and conservation concepts. The scale comprises 31 items across four dimensions: the first section evaluates marine knowledge, while the remaining dimensions utilize a four-point Likert scale to assess cognitive, socio-emotional, and behavioral learning objectives, respectively. The results indicate …
Dynamic Governance Of Transboundary Fisheries Through Deep Learning And High-Frequency Vessel Tracking Data For Climate-Resilient Management: An Application To The East China Sea, Qin Lin, Yaqing Shu, Manel Grifoll, Hongxiang Feng
Dynamic Governance Of Transboundary Fisheries Through Deep Learning And High-Frequency Vessel Tracking Data For Climate-Resilient Management: An Application To The East China Sea, Qin Lin, Yaqing Shu, Manel Grifoll, Hongxiang Feng
Journal of Marine Science and Technology–Taiwan
Transboundary fisheries governance is increasingly challenged by jurisdictional conflicts, regulatory asymmetries, and climate-induced stock shifts in fish stocks, especially in contested regions like the East China Sea (ECS). This study capitalizes on China’s high-frequency BeiDou Navigation Satellite System (BDS) data (June 2021–May 2022) to pioneer a CNN-BiLSTM deep learning model to dynamically identify fishing hotspots and evaluate policy effectiveness. By integrating vessel trajectories, environmental variables, and regulatory events, we examine spatiotemporal patterns of fishing effort relative to seasonal bans, extreme weather, and quota systems. Key findings reveal: (1) post-moratorium (September–December) concentration of fishing intensity, peaking in November; (2) significant weather-driven …
Lock Scheduling Decisions And Strategy Optimization Under Operation Interruption Scenarios, Junhe Li, Qiang Zhang, Junpeng Jiang, Jiangchao Bao
Lock Scheduling Decisions And Strategy Optimization Under Operation Interruption Scenarios, Junhe Li, Qiang Zhang, Junpeng Jiang, Jiangchao Bao
Journal of Marine Science and Technology–Taiwan
Locks are critical nodes in inland waterway transportation systems that concentrate vessel traffic between upstream and downstream reaches, making their operations highly sensitive to hydrological conditions. Therefore, disruptions caused by droughts, floods, or routine maintenance can easily trigger congestion. To address this issue, this study systematically examines the interrelationships among the number of ships awaiting passage, scheduling strategies, the trade-off between lock chamber utilization and ship waiting time, the influence of ship entry sequences on user satisfaction, and the combined effects of these factors on overall lock scheduling performance. Based on these analyses, an integrated decision-making model for two-stage ship …
Corrosion Protection Assessment Of Offshore Wind Turbine Substructures Using Beasy Cp Simulation Analysis, Chuan-Yang Wan, Hung-Hua Sheu, Sheng-Yu Wang, Yao-Ming Wang, Wei-De Chen, Ming-Yuan Lin, Hung-Bin Lee
Corrosion Protection Assessment Of Offshore Wind Turbine Substructures Using Beasy Cp Simulation Analysis, Chuan-Yang Wan, Hung-Hua Sheu, Sheng-Yu Wang, Yao-Ming Wang, Wei-De Chen, Ming-Yuan Lin, Hung-Bin Lee
Journal of Marine Science and Technology–Taiwan
This study investigates the corrosion protection assessment of offshore wind turbine substructures established in the waters off Keelung, Taiwan. First, a cathodic protection system for the monopile foundation is designed and established. The Boundary Element Method (BEM) is applied using the BEASY simulation software to develop a 3D geometric model for cathodic protection. In the steel monopile simulation analysis, the exposed marine environment is set based on the sea conditions of the Keelung small boat marina, including parameters such as salinity, resistance, and polarization curves, to establish an effective cathodic protection system for underwater structures. By simulating these parameters, a …