Aquacultural Engineering最新文献_第2页

Development and evaluation of reference feed intake models for meagre (Argyrosomus regius) 开发和评估肉牛（Argyrosomus regius）的参考采食量模型

IF 3.6 2区农林科学

Aquacultural Engineering Pub Date : 2025-02-25 DOI: 10.1016/j.aquaeng.2025.102526

Marina Linhares Azevedo , Tomé Silva , Filipe Soares , Sergey Budaev , Luis E.C. Conceição , Ivar Rønnestad

{"title":"Development and evaluation of reference feed intake models for meagre (Argyrosomus regius)","authors":"Marina Linhares Azevedo , Tomé Silva , Filipe Soares , Sergey Budaev , Luis E.C. Conceição , Ivar Rønnestad","doi":"10.1016/j.aquaeng.2025.102526","DOIUrl":"10.1016/j.aquaeng.2025.102526","url":null,"abstract":"<div><div>The aim of the study was to identify a basic reference feed intake model to facilitate understanding of the impact of temperature as the key environmental factor, along with body weight and dietary composition. These basic models should provide the baseline for further research to advance precision farming practices and support efficient production for meagre (<em>Argyrosomus regius</em>). Several reference models, with different levels of complexity, were built using data from scientific publications and feeding tables, followed by evaluating 27 different models using various fitting methods. Each model's mean absolute percentage error was estimated through repeated 5-fold cross-validation (with n = 200 iterations). Models were divided into four categories based on the inclusion of temperature and diet composition parameters: simple feed-independent models, complex feed-independent models, simple feed-dependent models, and complex feed-dependent models. The best model from each category was identified, followed by an assessment of the overall best. Consistent with dynamic energy budget theory, models using a fixed body weight exponent of 2/3 demonstrated better fit. Feed-dependent models incorporating lipid levels outperformed feed-independent ones. Additionally, simpler models with temperature parameters effectively predicted feed intake at optimal temperatures, while more complex models predicted intake better above the thermal optimum. The reference models selected in this study can be applied to estimate feed requirements over time for production or experimental trials, benchmark feeding to isolate the effect of other variables, support growth models and alternative feeding tables, and provide decision support.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"110 ","pages":"Article 102526"},"PeriodicalIF":3.6,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143527535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Energy analysis in fish aquaculture: Cumulative energy demand of different farming systems

IF 3.6 2区农林科学

Aquacultural Engineering Pub Date : 2025-02-22 DOI: 10.1016/j.aquaeng.2025.102525

Michele Zoli, Jacopo Bacenetti

{"title":"Energy analysis in fish aquaculture: Cumulative energy demand of different farming systems","authors":"Michele Zoli, Jacopo Bacenetti","doi":"10.1016/j.aquaeng.2025.102525","DOIUrl":"10.1016/j.aquaeng.2025.102525","url":null,"abstract":"<div><div>Energy consumption is one of the critical challenges for the continued growth of the aquaculture sector. In addition to the substantial feed consumption common to all types of systems, the high direct energy demand is driven by electricity use for water extraction, pumping, and aeration in land-based farms, and by fuel consumption in coastal farms. The aim of this study is to analyse the Cumulative Energy Demand (CED) of the production of European Sea Bass and Gilthead Sea Bream across different farming systems in the Mediterranean area. By focusing on both land-based and coastal sea-cage systems, an energy analysis of four different farms was conducted using a “from cradle to gate” life cycle approach. The functional unit for this study was set at 1 tonne of fish. The results show that land-based farms have a higher CED (168,535 and 188,642 MJ/t) due to both feed consumption (32 and 39 % of the total) and the use of liquid oxygen (46 and 16 % of the total) and direct electricity (20 and 43 % of the total, with on-site electricity consumption of 34,167.6 and 14,086.8 MJ/t). The lower CED of coastal farms (66,224 and 76,507 MJ/t) is largely due to feed usage (around 90 % of the total) and low fuel intensity (67.6 and 82.9 l/t, corresponding to 2495 and 3057 MJ/t, respectively). A scenario analysis was conducted using the 2030 projected national electricity mix of the Integrated National Energy and Climate Plan for land-based farms. Additionally, the impact of substituting diesel with biofuel in coastal farms was evaluated. The results indicate that these changes could reduce the use of non-renewable sources by at least 5 %.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"110 ","pages":"Article 102525"},"PeriodicalIF":3.6,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143508456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of biofilter management modalities on the microbiological status in RAS water to avoid recording capacities of biofilms

IF 3.6 2区农林科学

Aquacultural Engineering Pub Date : 2025-02-19 DOI: 10.1016/j.aquaeng.2025.102522

Al Dakdouki Salam , Nivelle Renaud , Ledoré Yannick , Fontaine Pascal , Frédérique Changey

{"title":"Effects of biofilter management modalities on the microbiological status in RAS water to avoid recording capacities of biofilms","authors":"Al Dakdouki Salam , Nivelle Renaud , Ledoré Yannick , Fontaine Pascal , Frédérique Changey","doi":"10.1016/j.aquaeng.2025.102522","DOIUrl":"10.1016/j.aquaeng.2025.102522","url":null,"abstract":"<div><div>Recirculating Aquaculture Systems (RAS) are increasingly seen as a breeding system of the future. the development of RAS requires understanding the microbial communities, as they play a significant role in the system functioning, water quality and therefore fish welfare and organoleptic characteristics. However, some aspects remain insufficiently explored, such as information regarding the residual microorganisms persisting in the system and originating from the past rearing conditions. Any studies on microbial communities in RAS mention specific protocols to obtain a similar initial microbial state in their systems before conducting their new studies. In this context, controlling the initial RAS microbial status (before starting a breeding cycle) and having a reliable, standardized protocol for obtaining this state in a reproducible way is essential. In contrast to a standard protocol (i.e. only raw cleaning), this study aimed to evaluate the effects of two treatments that differ in the way of management of biofilter media. The water microbial communities’ structure was assessed through the 16S rRNA gene over two weeks’ post-treatment. The results show that the standard protocol does not shift the microbial past of the tank and is responsible for strong inter-tanks heterogeneity. The testing protocol number T1 is the most reliable for homogenising initial microbial composition of tanks while preserving the microbial communities of interest.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"110 ","pages":"Article 102522"},"PeriodicalIF":3.6,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143609254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Biopolymer-encapsulated calcium peroxide tablets for slow sustained release of dissolved oxygen in fish tank

IF 3.6 2区农林科学

Aquacultural Engineering Pub Date : 2025-02-16 DOI: 10.1016/j.aquaeng.2025.102524

Akankshya Das , Yi Sun , Dhruba Jyoti Sarkar , V. Santhana Kumar , Basanta Kumar Das

{"title":"Biopolymer-encapsulated calcium peroxide tablets for slow sustained release of dissolved oxygen in fish tank","authors":"Akankshya Das , Yi Sun , Dhruba Jyoti Sarkar , V. Santhana Kumar , Basanta Kumar Das","doi":"10.1016/j.aquaeng.2025.102524","DOIUrl":"10.1016/j.aquaeng.2025.102524","url":null,"abstract":"<div><div>Dissolved oxygen (DO) is a critical water quality parameter for intensive aquaculture activities in tanks. For better fish survivability slow and sustained release oxygen formula is needed to maintain the optimum DO level for long time as traditional oxygen release tablets are fast-releasing and a repetitive application is required under emergency conditions and also during live fish marketing and transportation. In the present study, calcium peroxide tablets coated with a biopolymer, cellulose acetate and the performance of these coated tablets is tested for their superior oxygen release properties in fish tanks. The result revealed that coated oxygen tablets with cellulose acetate prolonged (43 % higher) the duration of oxygen release as compared to non-coated calcium oxide tablets in tanks without fish. Whereas in tanks with fish (<em>Labeo catla</em> fingerlings) addition of two coated tablets prolonged the optimum DO level for 3 h which is 33 % higher than the non-coated tablets. An addition of 10 noncoated tablets in fish tank created a hyperoxic condition and the DO level increased above 12 ppm, leading to agitated fish behavior. However, same level of coated tablets addition maintained the DO level above 5 ppm for 16 h and did not render any abnormal fish behaviour. Hence it can be concluded that cellulose acetate-coated calcium peroxide tablets can be utilised for intensive aquaculture for better performance and safe application for increasing the DO level during an emergency.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"110 ","pages":"Article 102524"},"PeriodicalIF":3.6,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143428269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Factors influencing feed distribution uniformity in aquaculture vessels based on DEM

IF 3.6 2区农林科学

Aquacultural Engineering Pub Date : 2025-02-12 DOI: 10.1016/j.aquaeng.2025.102523

Zhixin Xiong , Zinuo Huang , Yao Shi , Ming Ma

{"title":"Factors influencing feed distribution uniformity in aquaculture vessels based on DEM","authors":"Zhixin Xiong , Zinuo Huang , Yao Shi , Ming Ma","doi":"10.1016/j.aquaeng.2025.102523","DOIUrl":"10.1016/j.aquaeng.2025.102523","url":null,"abstract":"<div><div>To meet the feeding operation requirements of aquaculture vessels and enhance feed quality while minimizing fish competition and uneven feeding—factors that can degrade feed quality—a low-speed, uniformly distributing feeding disk was designed. This study uses Star-CCM+ to simulate the feed dispersal process of the rotating feeding disk and analyzes the effects of various factors on feed particle distribution. A discrete element model based on the mesh-free method was developed, incorporating the Hertz-Mindlin contact model for discrete feed particles, with rotating speed, height above the water surface, and initial particle velocity as variables. The shape and range of the dispersed feed distribution were observed. The results indicate that appropriately increasing the rotating speed or height improves feed distribution uniformity and increases the dispersal range. The optimal feeding effect is achieved when the drop height is 2 m and the rotating speed is 20 rpm. To evaluate the impact of ship roll on feed distribution, initial particle velocities were set to simulate changes under unstable sea conditions. When the initial particle velocity is 0.75 m/s, increasing the rotating speed to 20 rpm enhances distribution uniformity. This study provides valuable insights into the design and operational parameters of rotating feeding disks and serves as a reference for the development of feeding equipment for aquaculture vessels.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"110 ","pages":"Article 102523"},"PeriodicalIF":3.6,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Collection rates of detached mobile sea lice according to net mesh and body size: A benchtop model

IF 3.6 2区农林科学

Aquacultural Engineering Pub Date : 2025-02-05 DOI: 10.1016/j.aquaeng.2025.102514

Luke T. Barrett , Frode Oppedal , Minnie Harvey , Christiane Eichner , Florian Sambraus , Sussie Dalvin

{"title":"Collection rates of detached mobile sea lice according to net mesh and body size: A benchtop model","authors":"Luke T. Barrett , Frode Oppedal , Minnie Harvey , Christiane Eichner , Florian Sambraus , Sussie Dalvin","doi":"10.1016/j.aquaeng.2025.102514","DOIUrl":"10.1016/j.aquaeng.2025.102514","url":null,"abstract":"<div><div>A variety of aquaculture activities, such as crowding and delousing treatments, can lead to mobile parasitic stages of salmon lice (<em>Lepeophtheirus salmonis</em>) and sea lice (<em>Caligus elongatus</em>) being detached from host salmon (<em>Salmo salar</em>) and entering the environment, where they may pose a reinfestation risk for farmed or wild fish. Here, we constructed a benchtop physical model to simulate the retention of detached mobile lice (<em>L. salmonis</em> and <em>C. elongatus</em>) within crowding nets of differing mesh sizes and mesh types: 0.8, 1.6 and 2.0 mm polyester square mesh, and catchLICE™ mesh, a nominal 2.0 mm hexagonal weave. Mesh types and louse classes (species, life stage, sex) were each measured according to standardized methods. The 0.8 mm square mesh retained all mobile life stages of both sexes (pre-adult I to adult <em>L. salmonis</em>, and adult <em>C. elongatus</em>), while the 1.6 mm square mesh retained all pre-adult II female and adult <em>L. salmonis</em>, but not all adult <em>C. elongatus</em>. The 2 mm square mesh and catchLICE™ mesh retained all adult female <em>L. salmonis</em>, with varying loss rates for all other louse classes. Measurements of the cephalothorax length, width and height of each louse stage indicated that size was not the sole determinant of collection success, as lice that might have fitted through the mesh openings were often retained, even after repeated ‘flushing’ flow events. Behavioural observations of lice grasping and crawling on the net surface may partly explain this discrepancy. Overall, finer-meshed crowding nets offer a partial solution to loss of lice during crowding, especially for the largest life stages.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"110 ","pages":"Article 102514"},"PeriodicalIF":3.6,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143350565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cost effective optimization of bacteria removal in Nannochloropsis oceanica concentrates

IF 3.6 2区农林科学

Aquacultural Engineering Pub Date : 2025-01-20 DOI: 10.1016/j.aquaeng.2025.102513

Cynthia Couto , Fabio Roselet , Bruno Kubelka , Fernando Gonçalves , Robson Matheus Marreiro Gomes , Juan Rafael Buitrago Ramírez , José Maria Monserrat , Dariano Krummenauer

{"title":"Cost effective optimization of bacteria removal in Nannochloropsis oceanica concentrates","authors":"Cynthia Couto , Fabio Roselet , Bruno Kubelka , Fernando Gonçalves , Robson Matheus Marreiro Gomes , Juan Rafael Buitrago Ramírez , José Maria Monserrat , Dariano Krummenauer","doi":"10.1016/j.aquaeng.2025.102513","DOIUrl":"10.1016/j.aquaeng.2025.102513","url":null,"abstract":"<div><div>The objective of this study was to decrease bacterial contamination and improve the net benefit-cost of the process while preserving the integrity of microalgae cells. The washing process conditions were optimized to increase the rate of bacterial removal, making the process economically viable without impacting cell viability. To this, a Central Composite Rotational Design with four variables and two levels (CCRD 2<sup>4</sup>) was performed, generating 27 experimental units (runs). Cell viability was determined by subculture in culture medium and growth rate calculation. The rate of bacterial removal was estimated by directly counting bacteria in the concentrate before and after undergoing the washing process, and a Partial Budget Analysis estimated the net benefit-cost for each run. The experimental models of each response were combined using the desirability index to find the combination that generated the best result in all responses. The best relation between cell viability, bacterial removal efficiency rate, and PBA was found by repeating the process 5 times at 3.405 g-force at 24 °C for 20 min. To make the washing process economically viable, it was necessary to increase the sales price by 10 %, which is justified by the increase in shelf life that the process generates.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"109 ","pages":"Article 102513"},"PeriodicalIF":3.6,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143140085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of coconut waste and its biochar as hydroponics substrates on system performance and nitrogen transformation in aquaponics

IF 3.6 2区农林科学

Aquacultural Engineering Pub Date : 2025-01-18 DOI: 10.1016/j.aquaeng.2025.102512

Tianpei Li , Xiaochan Wang , Ze Zhu , Oorbessy Gaju , Yinyan Shi , Yuru Chang

{"title":"Effect of coconut waste and its biochar as hydroponics substrates on system performance and nitrogen transformation in aquaponics","authors":"Tianpei Li , Xiaochan Wang , Ze Zhu , Oorbessy Gaju , Yinyan Shi , Yuru Chang","doi":"10.1016/j.aquaeng.2025.102512","DOIUrl":"10.1016/j.aquaeng.2025.102512","url":null,"abstract":"<div><div>Aquaponic systems combine aquaculture and hydroponics, creating a circular and sustainable agricultural model that optimizes nutrient utilization. Improving nitrogen use efficiency is crucial for the system’s operational performance and nutrient cycling. This study explored the growth response of cherry tomatoes (<em>Lycopersicon esculentum</em> var. <em>Cerasiforme</em>) to different substrates, including coconut wastes and their biochar and medical stone, in the decoupled aquaponics system, focusing on reusing ammonia, nitrate and nitrite from crucian carp (<em>Carassius auratus</em>) farming effluent. Cherry tomato plants physiological information (plant height, fresh weight of the whole plant, and weight of tomato fruits, etc) and water quality parameters (ammonia nitrogen, nitrite nitrogen and nitrate nitrogen, pH) were monitored across different compartments. Results showed that using 6 mm columnar biochar as a substrate significantly improved the fresh weight, chlorophyll content, and overall weight of tomato plants, and the nitrogen conversion rate from aquaculture effluent to cherry tomatoes exceeded 89 %. Within 76 days, the relative removal rates of ammonia, nitrite and nitrate were above 84.20 %, 95.13 % and 83.98 %, respectively. The biochar composite with a 6 mm particle size demonstrated superior nitrogen immobilization and removal, suggesting a novel approach for the resource utilization of biomass materials. In conclusion, using biochar composite as a cultivation substrate improves nitrogen conversion rates and overall system efficiency of the aquaponic system, providing an effective and sustainable method for biomass material utilization.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"109 ","pages":"Article 102512"},"PeriodicalIF":3.6,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143140088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Feeding control and water quality monitoring on bioenergetic fish growth modeling: Opportunities and challenges

IF 3.6 2区农林科学

Aquacultural Engineering Pub Date : 2024-12-31 DOI: 10.1016/j.aquaeng.2024.102511

Fahad Aljehani , Ibrahima N’Doye , Taous-Meriem Laleg-Kirati

{"title":"Feeding control and water quality monitoring on bioenergetic fish growth modeling: Opportunities and challenges","authors":"Fahad Aljehani , Ibrahima N’Doye , Taous-Meriem Laleg-Kirati","doi":"10.1016/j.aquaeng.2024.102511","DOIUrl":"10.1016/j.aquaeng.2024.102511","url":null,"abstract":"<div><div>Aquaculture systems can benefit from the recent development of advanced control strategies to reduce operating costs and fish loss and increase growth production efficiency, resulting in fish welfare and health. Monitoring the water quality and controlling feeding are fundamental elements of balancing fish productivity and shaping the fish growth process. Currently, most fish-feeding processes are conducted manually in different phases and rely on time-consuming and challenging artificial discrimination. The feeding control approach influences fish growth and breeding through the feed conversion rate; hence, controlling these feeding parameters is crucial for enhancing fish welfare and minimizing general aquaculture costs. In addition to feeding, several important environmental factors, such as temperature, dissolved oxygen, and ammonia, also affect fish health and production. Therefore, there is a critical need to develop control strategies to determine optimal, efficient, and reliable feeding processes and monitor water quality. This paper reviews the main control design techniques for fish growth in aquaculture systems, namely algorithms that optimize the feeding and water quality of a dynamic fish growth process. Specifically, we review model-based control approaches and model-free reinforcement learning strategies to optimize the growth and survival of the fish or track a desired reference live-weight growth trajectory. The model-free framework uses an approximate fish growth dynamic model and does not satisfy constraints. We discuss how model-based approaches can support a reinforcement learning framework to efficiently handle constraint satisfaction and find better trajectories and policies from value-based reinforcement learning.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"109 ","pages":"Article 102511"},"PeriodicalIF":3.6,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143140080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of light intensity on the behavioural response and physiological parameters of rainbow trout (Oncorhynchus mykiss)

IF 3.6 2区农林科学

Aquacultural Engineering Pub Date : 2024-12-25 DOI: 10.1016/j.aquaeng.2024.102510

Xiao Liu , Liuyi Huang , Yuyan Li , Jianfeng Guan

{"title":"Effects of light intensity on the behavioural response and physiological parameters of rainbow trout (Oncorhynchus mykiss)","authors":"Xiao Liu , Liuyi Huang , Yuyan Li , Jianfeng Guan","doi":"10.1016/j.aquaeng.2024.102510","DOIUrl":"10.1016/j.aquaeng.2024.102510","url":null,"abstract":"<div><div>Light conditions play a pivotal role in enhancing the welfare of rainbow trout (<em>Oncorhynchus mykiss</em>) in deeper-offshore aquaculture systems in China. However, optimal light intensity and duration for improving rainbow trout welfare remain unclear due to limited foundational knowledge. This study investigated the effects of different light intensities (control group <em>L</em><sub>0</sub>: 0 lx; treatment groups <em>L</em><sub>1</sub>: 42.8 lx, <em>L</em><sub>2</sub>: 59.0 lx, <em>L</em><sub>3</sub>: 63.5 lx, <em>L</em><sub>4</sub>: 73.0 lx) and exposure durations (1 hour and 7 days) on the behavioural responses and physiological parameters of rainbow trout. Behavioural tests measured the frequency of fish crossing a light curtain during a 10-minute period, while physiological parameters including plasma cortisol, total protein (TP), albumin (ALB), triglyceride (TG), total cholesterol (TC), aspartate transaminase (AST), and alanine transaminase (ALT) were assessed after 1-hour and 7-day treatments. Results reveal that the rainbow trout exhibits the highest crossing frequency under <em>L</em><sub>1</sub>, alongside significantly lower levels of cortisol, TP, TG, TC, and AST compared to higher light intensities. In contrast, higher light intensities (<em>L</em><sub>2</sub>, <em>L</em><sub>3</sub>, and <em>L</em><sub>4</sub>) cause increased stress, reflected by elevated plasma cortisol, protein, lipid, and enzyme levels. There are no significant differences in behaviour or physiological responses between <em>L</em><sub>0</sub> and <em>L</em><sub>1</sub>. These findings imply that <em>L</em><sub>1</sub> represents a balanced light intensity that supports natural swimming behaviours with minimal stress, while higher intensities induce elevated stress. Therefore, a light intensity of 42.8 lx (<em>L</em><sub>1</sub>) is recommended to enhance fish welfare in deeper-offshore aquaculture systems when artificial light is utilized.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"109 ","pages":"Article 102510"},"PeriodicalIF":3.6,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143140086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0