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Performance evaluation and mathematical model of pipeline diffused aeration for recirculating aquaculture system Aquacult. Eng. (IF 4.0) Pub Date : 2024-02-23 Mingdong Ji, Zhangying Ye, Haijun Li
High requirement of aerating to increase dissolved oxygen is essential for improving the level of intensive recirculating aquaculture system (RAS). A simple, low-cost and maintainable pipeline diffused aeration (PDA) was proposed and designed for pure oxygen to increase the dissolved oxygen. It mainly consists of a diffused aeration stone, a union tee and an interior plug joint. The aim of this article
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Vision-based dual network using spatial-temporal geometric features for effective resolution of fish behavior recognition with fish overlap Aquacult. Eng. (IF 4.0) Pub Date : 2024-02-14 Haixiang Zhao, Yuankai Wu, Keming Qu, Zhengguo Cui, Jianxin Zhu, Hao Li, Hongwu Cui
In this study, a novel visualization framework for fish behavior recognition based on Slowfast networks and spatial-temporal graph convolutional networks (ST-GCN) is proposed. The framework can directly recognize fish behaviors in continuous videos and classify fish states in cases of severe fish stacking. A self-constructed fish behavior dataset containing 10 single fish HD videos and 300 fish schooling
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Dissolved oxygen prediction using regularized extreme learning machine with clustering mechanism in a black bass aquaculture pond Aquacult. Eng. (IF 4.0) Pub Date : 2024-02-05 Pei Shi, Liang Kuang, Limin Yuan, Quan Wang, Guanghui Li, Yongming Yuan, Yonghong Zhang, Guangyan Huang
Dissolved oxygen (DO) is an important indicator of aquaculture water quality. The prediction accuracy of DO content is the key role in managing and controlling aquaculture water quality. However, potential trends of DO under various conditions (such as weather) are always overlooked. This study aims to develop a novel DO forecasting model using the optimized regularized extreme learning machine (RELM)
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Enhancing the marine antifouling property of high-density polyethylene through melt grafting of poly (hexamethylene guanidine) Aquacult. Eng. (IF 4.0) Pub Date : 2024-01-29 Jiaqi Wang, Wenwen Yu, Wenying Liu, Guofeng Wang, Jiangao Shi, Hong Wang
Acquiring environment-friendly, wide-spectrum antifouling materials is currently a significant challenge. Herein, we focused on covalently bonding poly (hexamethylene guanidine) (PHMG) to high-density polyethylene (HDPE) through a melt grafting reaction. The successful occurrence of this grafting reaction was confirmed by FT-IR analysis. Moreover, the presence of long-chain branching (LCB) was established
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Biofilter and degasser performance at different alkalinity levels in a brackish water pilot scale recirculating aquaculture system (RAS) for post-smolt Atlantic salmon Aquacult. Eng. (IF 4.0) Pub Date : 2024-01-26 Leila Jafari, Marie Aline Montjouridès, Camilla Diesen Hosfeld, Kari Attramadal, Sveinung Fivelstad, Håkon Dahle
Maintaining pH stability in Recirculating Aquaculture Systems (RAS) is essential, as it has a direct impact on the toxicity of ammonia, CO2, and other metabolite compounds, as well as the efficiency of critical processes like nitrification and CO2 removal. Alkalinity is necessary for pH stability and for the inorganic carbon supply to nitrifying bacteria. The relationship between alkalinity, nitrification
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Prawn morphometrics and weight estimation from images using deep learning for landmark localization Aquacult. Eng. (IF 4.0) Pub Date : 2024-01-20 Alzayat Saleh, Md Mehedi Hasan, Herman W. Raadsma, Mehar S. Khatkar, Dean R. Jerry, Mostafa Rahimi Azghadi
Accurate morphometric analyses and weight estimation are useful in aquaculture for optimizing feeding, predicting harvest yields, identifying desirable traits for selective breeding, grading processes, and monitoring the health status of production animals. However, the collection of phenotypic data through traditional manual approaches at industrial scales and in real-time is time-consuming, labour-intensive
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Numerical study on hydrodynamic behaviors of and flow field around UHMWPE plane nets Aquacult. Eng. (IF 4.0) Pub Date : 2024-01-17 Haisheng Zhao, Yiyang Hu, Chunwei Bi, Xin Li
The hydrodynamic behaviors of and flow field around the net made by ultra-high molecular weight polyethylene (UHMWPE) were seldom investigated previously. Therefore, a three-dimensional numerical model for the UHMWPE plane net is established herein based on the porous media model, and the unknown Darcy-Forchheimer coefficients are attained by fitting the experimental data of physical model with the
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Numerical and experimental study of two common types of fouled net panels in the ocean Aquacult. Eng. (IF 4.0) Pub Date : 2024-01-20 Peng Li, Fangyu Gong, Hongde Qin, Songchen Yu
In this paper, the hydrodynamic and surrounding flow field characteristics of fouled nets panel are studied based on numerical and experimental methods. The types of fouled nets panel are analyzed and be divided into shell aggregation fouled net and bio-accumulation fouled net according to the attachment location and morphological characteristics of contaminants. Physical models of each type of fouled
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Hydrogen sulphide dynamics in recirculating aquaculture systems with moving or fixed bed biofilters: A case study in two commercial salmon smolt producing farms in Norway Aquacult. Eng. (IF 4.0) Pub Date : 2024-01-15 Paulo Mira Fernandes, Endre Steigum, Erik Höglund, Paula Rojas-Tirado, Åse Åtland
Sudden mass mortalities of fish reared in recirculating aquaculture systems (RAS) have occurred in recent years. High total dissolved sulphide (H2S + HS- + S2-) levels in the rearing water have been suggested as an underlaying factor for such mass mortalities. However, limited information is available regarding H2S dynamics in commercial aquaculture production facilities. In this case study, we present
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Effects of scaled-down dissolved air flotation system on suspended solids removal from Penaeus vannamei culture under biofloc conditions Aquacult. Eng. (IF 4.0) Pub Date : 2024-01-15 Helena Lopes Galasso, Marco Shizuo Owatari, Luis Alejandro Vinatea Arana, Katt Regina Lapa
Suspended solids removal is a fundamental procedure for improving water quality in super-intensive rearing of Pacific white shrimp Penaeus vannamei under biofloc conditions. The aim of this research was to evaluate a dissolved air flotation (DAF) model for removing total suspended solids in a biofloc system for P. vannamei with zero water exchange. The experiment was carried out using a pilot model
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Hydrodynamics of waste collection in a recirculating aquaculture tank with different flow-guide discs Aquacult. Eng. (IF 4.0) Pub Date : 2024-01-17 Jun Zhang, Ning Zhang, Minghua Wang, Congcong Chen, Yang Gao, Shouqi Cao, Xingguo Liu, Qinsong Hu, Zheng Zhang
To improve the efficiency of waste collection in recirculating aquaculture tanks (RATs), this study proposed a dual-channel RAT with flow-guide discs on the overflow pipe close to the bottom. First, an experimental verification system was designed, and the validity of the two-phase flow model was verified by comparing the experimental results. Then, the liquidsolid flow characteristics were analysed
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Innovative aquaculture cage “Flow2Vortex” ensures a sustainable biomass delivery for low trophic level aquaculture Aquacult. Eng. (IF 4.0) Pub Date : 2024-01-04 Jamileh Javidpour, Ralf Schwarz, Sonia K.M. Gueroun, Carlos A.P. Andrade, João Canning-Clode
The increasing global demand for seafood, coupled with the limitations of current fish stocks and aquaculture practices, requires the development of sustainable aquaculture solutions. In this context, this study explores the potential of a novel cage technology - Flow2Vortex - for the cultivation of jellyfish, a low-trophic-level organism with increasing market demand. The unique cage design creates
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Analysis of an optical imaging system prototype for autonomously monitoring zooplankton in an aquaculture facility Aquacult. Eng. (IF 4.0) Pub Date : 2023-12-21 M.N. Bowman, R.A. McManamay, A. Rodriguez Perez, G. Hamerly, W. Arnold, E. Steimle, K. Kramer, B. Norris, D. Prangnell, M. Matthews
Traditional approaches to biomonitoring in aquatic systems, such as sample collection, sorting, and identification, require significant time and effort, thereby limiting the spatiotemporal resolution of sample collection. Additionally, collection and preservation of samples for subsequent taxonomic identification and enumeration leads to mortality of organisms. Recent advances in technologies that
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Nitrogen metabolism potential in biofilm microbial communities: potential applications in the mariculture wastewater treatment Aquacult. Eng. (IF 4.0) Pub Date : 2023-12-12 Leilei Fan, Fulin Sun
Marine aquaculture wastewater is one of the major sources of nitrogen pollution in coastal areas, and excessive discharge poses a threat to human health and the marine ecosystem. In order to investigate the nitrogen metabolism potential of microorganisms in marine aquaculture water, metagenomic sequencing was conducted, and microbial communities involved in nitrogen metabolism on composite filler biofilms
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Numerical simulation of bionic fish group movement in a land-based aquaculture tank Aquacult. Eng. (IF 4.0) Pub Date : 2023-12-16 Yinxin Zhou, Boru Xue, Haibo Liu, Hangfei Liu, Ying Liu, Zhen Ma, Xiaozhong Ren, Yunpeng Zhao, Shupeng Du
The previous researches on hydrodynamics in aquaculture tanks are mainly on the basis of empty tanks, but the movement of fish group has a significant impact on the hydrodynamics in the tank. In this study, a numerical model coupling the fish group and flow field in the tank was established based on computational fluid dynamics (CFD), simulating the fluctuation motion of fish group in the circular
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Mineral supplementation in biofloc influences growth and haemato-biochemical indices of Genetically Improved Farmed Tilapia reared in inland saline ground water Aquacult. Eng. (IF 4.0) Pub Date : 2023-12-12 , Sreedharan Krishnan, Pankaj Kumar, Kapil Sukhdhane, A. Sathiya Kala, A.M. Babitha Rani
An experiment for a period of 60 days was performed with species specific mineral supplementation in biofloc system for GIFT tilapia reared in inland saline water. Four different concentrations of formulated mineral mixture (10, 15, 20, 25 g L−1) were supplemented in the subculture of biofloc inoculum for different treatments (T1, T2, T3, and T4). In contrast, two control groups (conventional culture
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Sedimentation of Crassostrea gigas and Perna perna biodeposits in the South Atlantic Aquacult. Eng. (IF 4.0) Pub Date : 2023-12-05 Eliziane Silva, Carlos Henrique Araujo de Miranda Gomes, Luis Hamilton Pospissil Garbossa, Claudio Manoel Rodrigues de Melo, Katt Regina Lapa
This study aimed to determine the vertical sedimentation velocity of fecal and pseudofecal matter from the bivalve molluscs Crassostrea gigas and Perna perna in the Santa Catarina Island bays, focusing on two diferente locations: Caieira da Barra do Sul (CBS) and Sambaqui (SBQ). The initial phase involved collecting biodeposits using a system with twelve chambers, directing a controlled seawater flow
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Where engineering meets biology: The Computational Fluid Dynamic analysis of a stacked duckweed bioreactor Aquacult. Eng. (IF 4.0) Pub Date : 2023-11-28 Daniel Maguire, Neil E. Coughlan, Marcel A.K. Jansen, Edmond P. Byrne, Fatemeh Kavousi
The necessity for sustainable farming practices, wastewater valorisation and circular economy applications have prompted increased interest in duckweed cultivation. As floating plants, duckweed species show rapid growth and can be cultured agri-food industry wastewater. Further, the resulting plant biomass is a valuable high-protein livestock feed and a biofuel feedstock. The development of multitiered
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Pond cascades as a tool for ecological aquaculture allowing natural zooplankton succession, nutrient retention, and multiple stocking–harvesting cycles Aquacult. Eng. (IF 4.0) Pub Date : 2023-11-28 Lenka Kajgrová, Oldřich Pecha, Koushik Roy, Jaromír Dvořák, Marek Let, Jan Potužák, Jaroslav Vrba, Martin Bláha
Fishpond cascades represent interconnected artificial ecosystems with multifaceted ecological and economic potential. This study investigated the fishpond cascade integrated into an agricultural landscape in South Bohemia (Czechia), employed for advanced fry production without any manuring and feeding. Four interconnected fishponds (area 1–3 ha, 1 m mean depth, batch release–refilling of water) were
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An IoT based smart water quality assessment framework for aqua-ponds management using Dilated Spatial-temporal Convolution Neural Network (DSTCNN) Aquacult. Eng. (IF 4.0) Pub Date : 2023-11-10 Peda Gopi Arepalli, K. Jairam Naik
Assuring the quality of water is crucial for the growth and survival of fish in aquaculture ponds. Traditional methods of water quality monitoring can be inefficient which makes real-time monitoring and decision is a challenging one. Some deep learning techniques have shown apparent in improving water quality monitoring and assessment process, but encounter some limitations like data-overfitting, interpretability
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A machine learning ensemble approach for predicting growth of abalone reared in land-based aquaculture in Hokkaido, Japan Aquacult. Eng. (IF 4.0) Pub Date : 2023-11-04 Nguyen Minh Khiem, Yuki Takahashi, Tomohiro Masumura, Genki Kotake, Hiroki Yasuma, Nobuo Kimura
Land-based aquaculture is an ideal aquaculture solution for creating high-quality seafoods and providing optimal conditions for maximizing growth of seafood production because environmental factors are well controlled. Predicting the growth of indoor-cultured abalone is meaningful because it facilitates evaluation of the effectiveness of this type of farming and understanding of the effects of controllable
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A small boat for fish feeding Aquacult. Eng. (IF 4.0) Pub Date : 2023-11-04 Mohamed Ali Ibrahim Al-Rajhi, Yasser Kamal Osman, Gomaa Galal Abd El-Wahhab, Khaled Abdeen Mousa Ali
This study focuses on development of a solar-powered Arduino Mega-driven robotic boat designed for efficient fish feeding in aquaculture. By integrating IoT technology and a mobile app, the project aims to reduce labor costs and improve feeding practices while addressing challenges associated with manual feeding, which previously failed to adequately cover the entire pond area. The research specifically
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A case study comparing the addition of two different carbon sources in pilot scale RAS with trout with and without biofilters Aquacult. Eng. (IF 4.0) Pub Date : 2023-10-21 Kim João de Jesus Gregersen, Lars-Flemming Pedersen
In this study, water quality and fish performance of traditional RAS with nitrifying biofilters were compared with systems operated under heterotrophic N assimilation (HET-N), a process where bacteria consume ammonium directly for growth and thereby remove dissolved N excreted from the fish, using three different modes of carbon addition. Using twelve identical pilot scale RAS, four treatment groups
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Evaluating protein skimmer performance in a commercial seawater recirculating aquaculture system (RAS) Aquacult. Eng. (IF 4.0) Pub Date : 2023-09-26 Bence Dániel Kovács, Kim João de Jesus Gregersen, Florian Rüppel, Arndt von Danwitz, Lars-Flemming Pedersen
Combining protein skimming with ozone (O3) is a common method for removing microparticles in recirculating aquaculture systems (RAS). Nevertheless, there is a limited number of studies that have validated protein skimming's performance at a commercial scale. Additionally, variations in protein skimmer designs and operational variables may yield different performance outcomes. In the present study,
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Intelligent recognition and behavior tracking of sea cucumber infected with Vibrio alginolyticus based on machine vision Aquacult. Eng. (IF 4.0) Pub Date : 2023-09-17 Wenkai Xu, Peidong Wang, Lingxu Jiang, Kui Xuan, Daoliang Li, Juan Li
The outbreak of aggregative diseases in the process of sea cucumber cultivation has brought huge economic losses to aquaculture farmers. It is of positive significance to realize intelligent detection of abnormal behavior to avoid the outbreak of aggregative diseases. Therefore, this paper researches the approaches of intelligent recognition and behavior tracking of sea cucumbers. Fusing the Coordinated
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Bottom culture is a promising strategy for final grow-out of the Portuguese oyster Crassostrea angulata Aquacult. Eng. (IF 4.0) Pub Date : 2023-09-09 Zonghe Yu
Almost all the Portuguese oyster Crassostrea angulata in China are grown in nearshore farms using suspended culture. Problems such as overstocking and environmental degradation have occurred in many suspended oyster farms. In this study, two batches of C. angulata, which were pre-grown in suspended culture in Dapeng Cove, South China Sea, were transplanted onto the seabed at the mouth of the bay. The
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ficoEst – a tool to estimate the body composition of farmed fish Aquacult. Eng. (IF 4.0) Pub Date : 2023-09-09 Filipe Soares, Andreia Raposo, Rodrigo Mendes, Marina Azevedo, Jorge Dias, Ana Nobre, Luís E.C. Conceição, Tomé Silva
ficoEst – Fish Composition Estimator is a public web tool to estimate the whole-body proximate composition of farmed fish (https://webtools.sparos.pt/ficoest/). The tool was designed for researchers in fish nutrition and fish farmers, and is available for six commercially relevant species: gilthead seabream (Sparus aurata), European seabass (Dicentrarchus labrax), meagre (Argyrosomus regius), rainbow
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Ultrafiltration for the biosecurity of fish production: The case of a sturgeon nursery Aquacult. Eng. (IF 4.0) Pub Date : 2023-09-06 J. Yang, A. Mouilleron, M. Monnot, C. Cordier, P. Moulin
Sturgeon farming requires special attention. In addition to a relatively long rearing, climate change has resulted in increasingly high temperatures favorable to the emergence of pathogens. The control of water quality is essential especially the first years of life of the fish to prevent a mimivirus (AcIV-E) and a mycobacterium (Mycobacterium liflandii). These crises can lead to significant mortality
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Aqua3DNet: Real-time 3D pose estimation of livestock in aquaculture by monocular machine vision Aquacult. Eng. (IF 4.0) Pub Date : 2023-09-07 Ming En Koh, Mark Wong Kei Fong, Eddie Yin Kwee Ng
We present a low-cost monocular 3D position estimation method for perception in aquaculture monitoring. Video surveillance of aquaculture has many advantages but given the size of farms and the complexity of their habitats, it is not feasible for farmers to continuously monitor fish health. We formulate a novel end-to-end deep visual learning pipeline called Aqua3DNet that estimates fish pose using
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Influence of dietary phosphorus on orthophosphate accumulation in recirculating aquaculture systems with rainbow trout (Oncorhynchus mykiss) Aquacult. Eng. (IF 4.0) Pub Date : 2023-09-01 Xiaoyu Huang, Johanne Dalsgaard, Sanni L. Aalto, Ivar Lund, Per Bovbjerg Pedersen
Dietary phosphorus (P) levels affect the excretion of orthophosphate (PO4-P) from fish. Since most recirculating aquaculture systems (RAS) do not specifically remove PO4-P within the recirculating loop, dietary P levels may influence PO4-P concentrations in RAS water. A feeding trial was performed in freshwater RAS, aiming to determine the relationship between dietary P levels and PO4-P accumulation
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Temporal and small-scale spatial variation in spatfall of the mussel Mytilus edulis platensis: Basis for culture management at San Jorge Gulf, Patagonia Argentina Aquacult. Eng. (IF 4.0) Pub Date : 2023-08-22 Tomás E. Isola, Damián G. Gil, Mauro S. Marcinkevicius, Héctor E. Zaixso, Néstor J. Cazzaniga
Despite the commercial potential of mussel populations along the Patagonian coast of Argentina, studies on mussel farming and fisheries to the south of parallel 42° S are clearly insufficient thus far. In this study, variations in mussel settlement (between sites and across depths) were monitored for 12 months at two contrasting sites in San Jorge Gulf, Argentina. The effect of depth on spat density
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Nascent application of aerobic granular sludge for recirculating aquaculture system effluent treatment: Performance, granule formation, and microbial community Aquacult. Eng. (IF 4.0) Pub Date : 2023-08-19 Talvikki Suhonen, Raed A. Al-Juboori, Antonina Kruglova, Jani Pulkkinen, Jouni Vielma, Anna Mikola
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Industry 4.0-based smart systems in aquaculture: A comprehensive review Aquacult. Eng. (IF 4.0) Pub Date : 2023-08-19 Vitorino Biazi, Carlos Marques
The Aquaculture industry is a sector that faces difficulties in maintaining a high-quality production of food in a sustainable way due to the technological limitations of the commercial tools and the lack of integration of systems and sensors that can monitor the environmental variables and physiological characteristics of the animals. In most aquaculture farms, human operators are still responsible
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Research progress of computer vision technology in abnormal fish detection Aquacult. Eng. (IF 4.0) Pub Date : 2023-08-01 Chunhong Liu, Zhiyong Wang, Yachao Li, Zhenzuo Zhang, Jiawei Li, Chen Xu, Rongxiang Du, Daoliang Li, Qingling Duan
Abnormal fish detection helps producers adjust breeding strategies in a timely manner to prevent the occurrence of diseases and improve aquaculture efficiency and quality. The rapid development of computer vision technology provides a noninvasive method for abnormal fish detection, which can be used to identify and classify abnormal fish. This paper provides an overview of the research progress of
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Research verification of four commercial scale split-pond designs Aquacult. Eng. (IF 4.0) Pub Date : 2023-07-26 Morgan Cheatham, Ganesh Kumar, Craig Tucker, Billy Rutland
Split ponds are earthen ponds divided into two sections: a small fish-confinement basin and a larger water-treatment basin. Water is circulated between the two basins using a high-volume pump. Although split ponds have proven their potential to increase the productivity of earthen catfish ponds, various pumping systems have been used in commercial settings. Choice of the best pumping system requires
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Waste characterization and biofilter sizing criteria for oligotrophic RAS egg incubators Aquacult. Eng. (IF 4.0) Pub Date : 2023-07-01 Marlon Greensword, Ronald F. Malone
Nitrogenous and carbonaceous waste associated with decaying eggs, eggshell debris, and hatching-related fluids, can overload egg incubation systems. In this work, BOD5, nitrogen, and protein are measured and compared across decaying eggs of 8 species to determine similarity in loading behavior. A statistical analysis shows that marine and freshwater species display similar egg loading. Results suggest
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Conveying characteristics of shrimp feed pellets in pneumatic conveying system and minimum power consumption dissipation factor Aquacult. Eng. (IF 4.0) Pub Date : 2023-06-22 Junping Song, Teng Wang, Guosheng Hu, Zijie Zhang, Wenjie Zhao, Zepeng Wang, Yuangang Zhang
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Steady-state and dynamic model for recirculating aquaculture systems with pH included Aquacult. Eng. (IF 4.0) Pub Date : 2023-06-09 Allyne M. dos Santos, Lucas F. Bernardino, Kari J.K. Attramadal, Sigurd Skogestad
In this work, simplified steady-state and dynamic models of a Recirculating Aquaculture System (RAS) of Atlantic salmon (Salmo salar) are described. The RAS process under study includes a fish tank, a biofilter, a CO2 stripper, and an oxygen cone. Compared to existing models, the main contribution is that it explicitly models the pH, by using reaction invariants such as total inorganic carbon (TIC)
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Feeding intensity assessment of aquaculture fish using Mel Spectrogram and deep learning algorithms Aquacult. Eng. (IF 4.0) Pub Date : 2023-06-09 Zhuangzhuang Du, Meng Cui, Qi Wang, Xiaohang Liu, Xianbao Xu, Zhuangzhuang Bai, Chuanyu Sun, Bingxiong Wang, Shuaixing Wang, Daoliang Li
Accurately and objectively analyzing fish feeding intensity is essential to guiding feeding and production techniques. Fish feeding intensity in recirculating aquaculture systems (RAS) can be used to indicate a fish's appetite. However, the low efficiency and lack of objectivity of manual observation are problems with current fish feeding intensity assessment processes. Applying acoustic techniques
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Comparing traditional vs. biodegradable seed mussel collectors (SMCs) for seed settlement, seed density, and seed growth: Effect of deployment depth and location Aquacult. Eng. (IF 4.0) Pub Date : 2023-05-25 Lisanne A. van den Bogaart, Jildou Schotanus, Jacob J. Capelle, Tjeerd J. Bouma
Mussel bottom culture is historically based on transplanting wild mussel seed to designated culture plots. Seed mussel collectors (SMCs) that are deployed in the water column are gradually replacing benthic mussel beds for mussel seed resource provisioning. Traditional SMCs consist of weighted filamentous nylon ropes. The performance of SMCs are promising, but the major disadvantages are the increased
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Sedimentation efficiency evaluation of an aquaculture tank through experimental floc characterization and CFD simulation Aquacult. Eng. (IF 4.0) Pub Date : 2023-05-19 Boris Miguel López-Rebollar, Daury García-Pulido, Carlos Diaz-Delgado, Ivan Gallego-Alarcón, Juan Antonio García-Aragón, Humberto Salinas-Tapia
One of the most important parameters for the proper functioning of an aquaculture tank is water quality. The survival and healthy growth of fish depends on it. The main factors affecting water quality are the remains of food and feces of fish which form cohesive particles called flocs that are kept within the tank or in the modules of the recirculating aquaculture system (RAS). Through the application
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Assessing sensing techniques for detecting markers of approaching ecdysis in juvenile tropical rock lobsters, Panulirus ornatus Aquacult. Eng. (IF 4.0) Pub Date : 2023-05-19 Charles Sutherland, Alan Henderson, Andrew J. Trotter, Dean Giosio, Greg Smith
Developing hatchery technology for spiny lobsters has promoted interest in the establishment of a commercial land-based lobster aquaculture industry in Australia. Cannibalism in culture is extensive with cannibalistic interactions occurring during a relatively brief vulnerability while moulting. Therefore, pre-ecdysis characterisation is indicated as an opportunity to disrupt cannibalism. Detecting
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MortCam: An Artificial Intelligence-aided fish mortality detection and alert system for recirculating aquaculture Aquacult. Eng. (IF 4.0) Pub Date : 2023-05-10 Rakesh Ranjan, Kata Sharrer, Scott Tsukuda, Christopher Good
Mortality is an important production and fish welfare indicator in aquaculture. Unusual mortality patterns can be associated with abiotic or/and biotic stresses on fish in recirculating aquaculture systems (RAS). Real or near real-time mortality tracking can provide valuable inputs to farm managers, to make informed RAS management decisions and address root causes in an effort to prevent mass mortality
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Ebb and flow versus constant water level on the sweet banana chili pepper (Capsicum annuum) production in an aquaponic system Aquacult. Eng. (IF 4.0) Pub Date : 2023-05-09 Nicholas Romano, Shahidul Islam, Hayden Fischer
Bell siphons are used in aquaponic systems to create rising and falling water levels in plant culture beds that facilitates water exchanges and elevates dissolved oxygen (DO) although this may also remove nutrient rich organic debris from the plant culture bed. Sweet banana chili pepper (Capsicum annuum) plants were aquaponically grown until maturity and then further cultured in a media-filled bed
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Smart headset, computer vision and machine learning for efficient prawn farm management Aquacult. Eng. (IF 4.0) Pub Date : 2023-05-02 Mingze Xi, Ashfaqur Rahman, Chuong Nguyen, Stuart Arnold, John McCulloch
Understanding the growth and distribution of the prawns is critical for optimising the feed and harvest strategies. An inadequate understanding of prawn growth can lead to reduced financial gain, for example, crops are harvested too early. The key to maintaining a good understanding of prawn growth is frequent sampling. However, the most commonly adopted sampling practice, the cast net approach, is
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MSIF-MobileNetV3: An improved MobileNetV3 based on multi-scale information fusion for fish feeding behavior analysis Aquacult. Eng. (IF 4.0) Pub Date : 2023-04-18 Yuquan Zhang, Chen Xu, Rongxiang Du, Qingchen Kong, Daoliang Li, Chunhong Liu
Assessing the intensity of fish feeding activity using fish feeding behavior can help farmers efficiently decide on the amount of feeding bait. However, accurate extraction of fish feeding behavior features is difficult because of the small area of fish in the image and the randomness of fish swimming. To address this problem, an improved MobileNetV3 network, namely multi-scale information fusion (MSIF)-MobileNetV3
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Linear modelling of the mass balance and energy demand for a recirculating aquaculture system Aquacult. Eng. (IF 4.0) Pub Date : 2023-03-17 Gerard Ayuso-Virgili, Leila Jafari, David Lande-Sudall, Norbert Lümmen
This work seeks to understand the predominant drivers affecting energy demand for a recirculating aquaculture system (RAS) by developing a numerical model in Matlab coupled with Aspen HYSYS and validating against measurement data for a case-study site. 15 weeks of RAS operation were simulated to replicate the grow-out of Atlantic salmon (Salmo salar) from 42.5 to 322 g body weight (BW). Data on water
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Self-cleaning performance of three bottom drain modes in circular culture tank: Experimental and numerical study Aquacult. Eng. (IF 4.0) Pub Date : 2023-03-14 Chol-Ho An, Un-Sun Kim, Kwang-Hyok Kim, Rim-Gyong Jon, Myong-Guk Sin
This work investigated the self-cleaning performance of three drain modes in circular bottom drain water tanks with tangential inlet. Removal experiments in center, eccentric and center-eccentric combined (dual) drain modes were carried out in a miniature tank with a diameter of 0.44 m and a depth of 0.215 m for a hydraulic retention time of 30 min using two artificial bio-wastes mimicking fish fecal
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Simultaneous biomethane production and nutrient remineralization from aquaculture solids Aquacult. Eng. (IF 4.0) Pub Date : 2023-03-11 Victor Lobanov, Jo De Vrieze, Alyssa Joyce
The rapid expansion of the aquaculture industry has brought about a heightened focus on the waste produced by high intensity fish farming. In closed-containment, recirculating aquaculture systems (RAS), fish solids are mechanically separated and/or coagulated before being disposed as waste. Subsequent revalorization is typically limited to the direct dispersal of aquaculture solids onto agricultural
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Influence of inlet placement on the hydrodynamics of the dual-drain arc angle tank for fish growth Aquacult. Eng. (IF 4.0) Pub Date : 2023-03-05 Haibo Liu, Boru Xue, Xiaozhong Ren, Zhangying Ye, Linping Yu, Qian Zhang
The aquaculture tank is an infrastructure for aquaculture, and the choice of its geometry, structural design of the inlet and outlet pipes and the placement position and other parameters are crucial to the influence of the hydrodynamic performance of the tank. In this paper, a numerical computational model of the hydrodynamics of a dual-channel rectangular circular-angle culture tank is established
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Systematic optimization of the square arc angle aquaculture tank combining CFD methodology and multi-objective genetic algorithm Aquacult. Eng. (IF 4.0) Pub Date : 2023-02-22 Hang-Fei Liu, Xiaozhong Ren, Boru Xue, Chun-Wei Bi, Yun-Peng Zhao, Ying Liu
The hydrodynamic performance inside the recirculating aquaculture tank is critical for the welfare of aquaculture. It is undoubtedly a preferable alternative to achieve a conducive flow environment inside the aquaculture tank through optimizing the geometry structure of the aquaculture tank. In this study, combining the computational fluid dynamics (CFD) approach and multi-objective genetic algorithm
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Effects of feed, carbohydrate addition and stocking density on Pacific white shrimp (Litopenaeus vannamei) production Aquacult. Eng. (IF 4.0) Pub Date : 2023-02-14 Tran Huu Tinh, Fotini Kokou, Tran Ngoc Hai, Johan A.J. Verreth, Marc C.J. Verdegem
Shrimp culture rearing systems are dynamic with numerous processes influencing system performance. This research investigated the effects of stocking density, feeding level and C:N ratio on shrimp production, water quality and microbial community composition in a biofloc shrimp rearing system, using a 3 × 3 factorial design. Pacific white shrimp (Litopenaeus vannamei) were stocked at 27, 120, or 300
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Hydrodynamics of waste collection in a recirculating aquaculture tank with different numbers of inlet pipes Aquacult. Eng. (IF 4.0) Pub Date : 2023-02-13 Jun Zhang, Zhihao Zhang, Xuan Che, Congcong Chen, Yang Gao, Ning Zhang, Dinala Maidaibieke, Xingyu Zhu, Chen Ziling
To improve the utilization of energy input from inlet pipe jets and the efficiency of waste collection in a recirculating aquaculture system (RAS), the hydrodynamics and self-purification efficiency of square fillet aquaculture tanks were studied under different numbers of inlet pipes and particle physical properties. First, a numerical model was established by reference to the experimental model,
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Robust automatic net damage detection and tracking on real aquaculture environment using computer vision Aquacult. Eng. (IF 4.0) Pub Date : 2023-02-08 Julio Labra, Marcos D. Zuniga, Javier Rebolledo, Mohamed A. Ahmed, Rodrigo Carvajal, Nicolás Jara, Gonzalo Carvajal
Sea cage inspection is a crucial task in marine aquaculture for both controlling the quality in the fish development process and the environmental impact of these facilities. Net damage in sea cages can cause fish to escape from fish farms to the open sea, producing serious economic losses and compromising the surrounding marine ecosystem. Currently, the most sophisticated inspection processes used
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The effects of stocking density and artifical substrate on production of pacific white shrimp Litopenaeus vannamei and water quality dynamics in greenhouse-based biofloc systems Aquacult. Eng. (IF 4.0) Pub Date : 2023-01-31 Nathan A. Kring, Leo J. Fleckenstein, Thomas W. Tierney, Jill C. Fisk, Benjamin C. Lawson, Andrew J. Ray
Inland shrimp aquaculture has increased in popularity in recent years as a means of providing fresh seafood to consumers away from the coasts. With adequate marketing,fresh shrimp fetch relatively high prices and can give farmers a means of diversifying, production. In temperate regions such as Kentucky, low-cost high tunnel greenhouses may be used to extend the growing season of warm-weather crops
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Biofloc colors as an assessment tool for water quality in shrimp farming with BFT systems Aquacult. Eng. (IF 4.0) Pub Date : 2023-01-13 Otávio Augusto Lacerda Ferreira Pimentel, André Megali Amado, Ng Haig They
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Production of Pacific white shrimp under different stocking density in a zero-water exchange biofloc system: Effects on water quality, zootechnical performance, and body composition Aquacult. Eng. (IF 4.0) Pub Date : 2022-12-15 Maryam Irani, Houman Rajabi Islami, Mahmoud Nafisi Bahabadi, Seyed Pezhman Hosseini Shekarabi
This experiment was conducted to compare water quality, growth performance, body composition, and insulin growth factor gene expression of Pacific white shrimp, Litopenaeus vannamei, reared under different stocking densities (100, 200, 300, and 400 shrimp m−3) in a biofloc system with zero-water exchange for nine weeks. The results demonstrated that all the water quality variables remained within the
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Detection of residual feed in aquaculture using YOLO and Mask RCNN Aquacult. Eng. (IF 4.0) Pub Date : 2022-11-12 Haigang Hu, Chao Tang, Ce Shi, Yunxia Qian
A dual-strategy residual feed detection algorithm based on improved You Only Look Once (YOLO) v3 and Mask Region-Based Convolutional Networks (RCNN) was explored for detecting residual feed in aquaculture areas. After improving the YOLO v3 network structure, the program can better extract the boundary box of swimming crabs and recognize tiny targets. Using the customized Mask RCNN, the region proposal