Aquaculture and Fisheries最新文献_第5页

Effects of biological flocculation technology (BFT) on water quality dynamics and immune response of grass carp (Ctenopharyngodon idella) 生物絮凝技术（BFT）对草鱼水质动态和免疫反应的影响

Aquaculture and Fisheries Pub Date : 2024-11-01 DOI: 10.1016/j.aaf.2023.04.005

{"title":"Effects of biological flocculation technology (BFT) on water quality dynamics and immune response of grass carp (Ctenopharyngodon idella)","authors":"","doi":"10.1016/j.aaf.2023.04.005","DOIUrl":"10.1016/j.aaf.2023.04.005","url":null,"abstract":"<div><div>The biofloc technology (BFT) offers benefits in improving feed utilization and reducing the feed conversion ratio compared to the recirculating aquaculture system (RAS). In this study, high-throughput 16S rRNA gene sequencing was employed to investigate and compare the bacterial communities in these aquaculture systems and the gut microbiota of grass carp reared in them. We observed a significant distinction between the microbial communities of the aquaculture systems and the intestinal microbiota of grass carp. The genera <em>cetobacterium</em> and <em>bacillus</em> were more abundant in the BFT system, accounting for only 0.05% and 0.25% in the RAS. Our study also demonstrated that BFT could influence the intestinal microorganisms of grass carp (<em>Ctenopharyngodon Idella</em>) by reducing the relative abundance of <em>burkholderia</em>-<em>caballeronia</em>-<em>paraburkholderia</em> and increasing that of <em>cetobacterium</em>. Based on bugBase community predictions, the potential pathogenicity in BFT and grass carp intestine was lower than in RAS. Regarding gene expression in the grass carp intestine, immunosuppressive genes showed higher expression, while pro-inflammatory genes exhibited lower expression in grass carp reared in BFT. Furthermore, the final average length and weight of grass carp in the BFT system were significantly higher than those in the RAS. This study provides valuable insights into gut microbiome ecology in relation to two grass carp aquaculture systems, which could be effectively applied in grass carp management to promote health and improve water quality.</div></div>","PeriodicalId":36894,"journal":{"name":"Aquaculture and Fisheries","volume":"9 6","pages":"Pages 921-928"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90102894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 microbe-derived antioxidants on growth, digestive and aminotransferase activities, and antioxidant capacities in the hepatopancreas of Eriocheir sinensis under ammonia nitrogen stress 微生物源抗氧化剂对氨氮胁迫下中华鳖肝胰腺的生长、消化酶和转氨酶活性以及抗氧化能力的影响

Aquaculture and Fisheries Pub Date : 2024-11-01 DOI: 10.1016/j.aaf.2022.12.002

{"title":"Effects of microbe-derived antioxidants on growth, digestive and aminotransferase activities, and antioxidant capacities in the hepatopancreas of Eriocheir sinensis under ammonia nitrogen stress","authors":"","doi":"10.1016/j.aaf.2022.12.002","DOIUrl":"10.1016/j.aaf.2022.12.002","url":null,"abstract":"<div><div>This study evaluated the effects of feeding a microbial-derived antioxidant diet (MA) for 56 days on the growth performance of Eriocheir sinensis, as well as on digestive and metabolic enzyme activity and antioxidant capacity under ammonia stress (400 mg/L ammonia nitrogen for 48 h). The weight gain at 28d and the specific growth rate at 56ds for crabs in the MA group were significantly higher than those in the control diet (C) group (<em>p</em> < 0.05). Compared with the C group, the color of the hepatopancreas in the MA group was significantly improved (<em>p</em> < 0.05). A significant decrease in the level of Hemolymph ammonia was found in the microbial antioxidant ammonia-N (MA_A) group (<em>p</em> < 0.05), which may be related to the decrease of transaminase (AST, ALT, GDH) activities caused by MA diet (<em>p</em> < 0.05). There is a significant increase in the digestive enzyme activities (Trypsin and Lipase), which reduced the accumulation of triglycerides in the hepatopancreas in the (MA_A) group (<em>p</em> < 0.05). In addition, the antioxidant damage of crabs in hepatopancreas caused by ammonia nitrogen toxicity could also significantly be improved by MA fed in the (MA_A) group (<em>p</em> < 0.05). microbe-derived antioxidants (supplemented with 0.2% in feeds) can protect the health of hepatopancreas, promote growth, and improve the ability to resist ammonia nitrogen stress for E.sinensis.</div></div>","PeriodicalId":36894,"journal":{"name":"Aquaculture and Fisheries","volume":"9 6","pages":"Pages 957-966"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73160500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

IKKε positively regulates NF-κB, MAPK, and IRF3-mediated type I IFN signaling pathways in Japanese eel (Anguilla japonica) IKKε 正向调节日本鳗鲡体内 NF-κB、MAPK 和 IRF3 介导的 IFN 信号通路

Aquaculture and Fisheries Pub Date : 2024-11-01 DOI: 10.1016/j.aaf.2023.01.001

{"title":"IKKε positively regulates NF-κB, MAPK, and IRF3-mediated type I IFN signaling pathways in Japanese eel (Anguilla japonica)","authors":"","doi":"10.1016/j.aaf.2023.01.001","DOIUrl":"10.1016/j.aaf.2023.01.001","url":null,"abstract":"<div><div>IKKε is an IκB kinase participating in the control of NF-κB and type I IFN signal pathways in mammals. However, the function of IKKε in regulating immune response is largely unknown in teleost. Herein, an IKKε homologue named <em>Aj</em>IKKε was characterized in Japanese eel (<em>Anguilla japonica</em>). <em>Aj</em>IKKε has an N-terminal kinase domain, a ubiquitin-like domain, and a coiled coil-containing domain (CC), which is conserved and similar to its counterpart in mammals. Expression analysis showed that <em>Aj</em>IKKε could be up-regulated in kidney, spleen, and particularly in liver under the stimulation of poly I:C, LPS, and <em>Aeromonas hydrophila</em> infection. <em>In vitro</em>, the mRNA levels of <em>Aj</em>IKKε were significantly provoked in eel liver cells stimulated by LPS and poly I:C, or the different concentrations of <em>A. hydrophila</em>. The overexpression of <em>Aj</em>IKKε could not only induce a significantly higher level of promoter activity of human NF-κB, AP-1, and IFN-β in a dose-dependent manner but also up-regulate the activation of promoters of Japanese eel cRel, AP1, IL6, IFN4, IRF3, and IRF7 in HEK293 cells. RNAi studies showed that after <em>Aj</em>IKKε was knocked down, the expression levels of IL1, IL6, TNFα, c-Jun, IFN2, IFN3, MX1, MX2, and IRF3 genes were significantly down-regulated in liver, spleen, and kidney of Japanese eels. In addition, the mutants of <em>Aj</em>IKKε-K39A, <em>Aj</em>IKKε-S174A, and <em>Aj</em>IKKε-ΔCC failed to activate Japanese eel IFN4, IRF3 and human IFN-β promoters in HEK293 cells. Collectively, these results suggest that <em>Aj</em>IKKε may function as a positive regulator of NF-κB, MAPK, and IRF3-mediated type I IFN signaling pathways related to immune response evoked by bacterial and viral infection.</div></div>","PeriodicalId":36894,"journal":{"name":"Aquaculture and Fisheries","volume":"9 6","pages":"Pages 908-920"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78132520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A compact underwater stereo vision system for measuring fish 用于测量鱼类的紧凑型水下立体视觉系统

Aquaculture and Fisheries Pub Date : 2024-11-01 DOI: 10.1016/j.aaf.2023.03.006

{"title":"A compact underwater stereo vision system for measuring fish","authors":"","doi":"10.1016/j.aaf.2023.03.006","DOIUrl":"10.1016/j.aaf.2023.03.006","url":null,"abstract":"<div><div>In the context of aquaculture, fish length is a key parameter to assess fish stocks, essential for feeding regime and contributes for decisions at several production levels. However, taking length measurements is a cumbersome task that, when applied to living individuals, can induce considerable stress, increasing the risk of damage or hindering their growth. Computer vision is one of the most used non-contact tools to overcome this issue, being fast, consistent and repeatable. However, its use in aquatic environments is limited by the high cost, the difficulty of calibrating the system in underwater conditions and the complexity of implementation. This paper proposes a low-cost easy-to-use vision system that can take measurements on live fish in aquatic conditions, without the need for a special calibration or a demanding in-water calibration service. The present work implemented a compact stereo vision system and developed a method that estimates the correct length of fish, based on the variation of the angle of incidence of the light rays in the water. Given some structural conditions such as a short baseline, the system is able to measure fish with an error of less than 1%. The short baseline allows to have a compact system and reduces the effect of water refraction on the 3D reconstruction. A set of experiments were performed with real fish, working robustly for a set of orientations of the fish (even when the caudal fin and snout are on different distances to the cameras).</div></div>","PeriodicalId":36894,"journal":{"name":"Aquaculture and Fisheries","volume":"9 6","pages":"Pages 1000-1006"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75300570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sturgeon and paddlefish: Review of research on broodstock and early life stage management 鲟鱼和桨鱼：鱼种和早期生命阶段管理研究综述

Aquaculture and Fisheries Pub Date : 2024-11-01 DOI: 10.1016/j.aaf.2023.04.001

{"title":"Sturgeon and paddlefish: Review of research on broodstock and early life stage management","authors":"","doi":"10.1016/j.aaf.2023.04.001","DOIUrl":"10.1016/j.aaf.2023.04.001","url":null,"abstract":"<div><div>Sturgeon aquaculture has taken a parallel yet unique path relative to other teleost rearing. One of the driving factors has been the fact that virtually all extant species are facing extinction; thus, laws concerning the transport and processing of sturgeon are stringent. As a result, most sturgeon companies vertically integrate the farming process from hatchery to harvest, in contrast to the production of other commercial fish species (e.g., trout, sea bass, salmon), where farmers tend to purchase fry from producers specialized only in the production of that life stage and sell product to unaffiliated fish processors. Sturgeon aquaculture is furthermore unique in the extremely high value of the main product (caviar). The secondary product (meat) also surpasses other finfish aquaculture products' average price per weight. These expensive outputs reveal the greatest challenge in production — an exceptionally long time to market from larvae to harvestable adults. For all their rigor and robustness as juveniles and adults, sturgeon species are highly fragile during larval stages. Due to the unique legal framework around sturgeon cultivation, aquaculturists often specialize in regional species, although some hybrids have achieved global popularity. This lends to a heterogenous swath of literature on best cultivation and management practices, especially at early growth stages. Nonetheless, the role of aquaculture as both a food source and restocking program to thwart further extinction of sturgeon species has hardly been fully tapped. In light of the many challenges, this review examines recent advances in sturgeon farming with an emphasis on broodstock and early life-stage management to summarize studies that can help researchers and farmers assess the industry's current state.</div></div>","PeriodicalId":36894,"journal":{"name":"Aquaculture and Fisheries","volume":"9 6","pages":"Pages 871-882"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82357053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of structural parameters on the hydrodynamic performance of vertical curved V-Type otter board 结构参数对垂直曲面 V 型獭兔板水动力性能的影响

Aquaculture and Fisheries Pub Date : 2024-11-01 DOI: 10.1016/j.aaf.2023.02.004

{"title":"Effect of structural parameters on the hydrodynamic performance of vertical curved V-Type otter board","authors":"","doi":"10.1016/j.aaf.2023.02.004","DOIUrl":"10.1016/j.aaf.2023.02.004","url":null,"abstract":"<div><div>In order to study the influence mechanism of structural type and size on the hydrodynamic performance of vertical curved V-type otter board, this paper based on the computational fluid dynamics method, a three-dimensional numerical model of vertical curved V-type otter board is established to calculate and analyze its hydrodynamic performance, and the validity of the numerical simulation results is verified by designing and constructing a scaled model for dynamic flume experiments. On this basis, the effects of different structural parameters, such as the deflector angle, camber, and spacing, on the hydrodynamic performance of the vertical curved V-Type otter board are investigated and the optimal structural design scheme is determined. The results demonstrate that single or synchronous changes of the angle, camber, and spacing of the two deflectors have varying degrees of impact on the hydrodynamic performance of the vertical curved V-Type otter board. To improve the expansion effect of the otter board, setting the angle of the deflector A to 40° and that of the deflector B to 30°, or setting the camber of deflectors A and B to 18%, or setting the spacing between deflectors A and B to 380 mm and that between the deflector and the main panel to 670 mm can increase the lift coefficient of the vertical curved V-Type otter board to its maximum value. Considering the overall performance of the otter board, when the angle of the deflector A is set to 25° and that of the deflector B is set to 30°, or the camber of the deflector A is set to 6% and that of the deflector B is set to 9%, or the spacing between deflectors A and B is set to 340 mm and that between the deflector and the main panel is set to 610 mm, the lift-to-drag ratio of the otter board can be increased to its maximum value.</div></div>","PeriodicalId":36894,"journal":{"name":"Aquaculture and Fisheries","volume":"9 6","pages":"Pages 989-999"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90304361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessment of different grass species extracts as source of micronutrients in prawn Macrobrachium rosenbergii feeds 不同草种提取物作为对虾饲料中微量元素来源的评估

Aquaculture and Fisheries Pub Date : 2024-11-01 DOI: 10.1016/j.aaf.2023.01.010

{"title":"Assessment of different grass species extracts as source of micronutrients in prawn Macrobrachium rosenbergii feeds","authors":"","doi":"10.1016/j.aaf.2023.01.010","DOIUrl":"10.1016/j.aaf.2023.01.010","url":null,"abstract":"<div><div>The present research is an attempt to screen five perennial indigenous grass species for their biochemical constituents seasonally for one year in order to determine the exact season for the harvest of the target species which will be used as feed ingredient. Among them, <em>Cynodon dactylon</em> has shown better result compared to other grass species and was hence incorporated as micronutrient in the formulated feed. <em>Macrobrachium rosenbergii</em> culture was carried out by feeding conventional and formulated feed (prepared from grass species) in tanks and ponds filled with spring water for 180 days in 2020 in the Eastern Ghats region of Koraput district, Odisha, India. Two treatments namely T<sub>1</sub> and T<sub>2</sub> having four replications each were supplied with commercial feed and formulated feed. Feeds were applied as per the body weight of prawns at 20% for the 1st month, 15% for the 2nd month, 10% for the 3rd and the 4th month, 5% for the 5th month and 2% till the end of the experiment. The water temperature, pH, dissolved oxygen, transparency, nitrate, phosphate, silicate, Chl <em>a</em> in the culture tanks and ponds were monitored fortnightly. ANOVA results between all the water parameters for both culture tanks and ponds showed significant variation (<em>P</em> < 0.05). The survival rate (77.0% ± 0.89%), daily growth rate (0.233 ± 0.05) g/day, specific growth rate (4.657% ± 1.04%) per day and condition index (2.638 ± 0.05) were found to be highest in prawns fed formulated feed. The feed conversion ratio varied from (2.03 ± 0.05) to (2.68 ± 0.04). Benefit cost ratio of field culture were 1.46 with yield of 702 kg/ha in conventional feed and 1.75 with yield of 950 kg/ha in formulated feed respectively. The study proved grass extracts to be efficient micronutrients for prawn feed which can be easily adopted in prawn production.</div></div>","PeriodicalId":36894,"journal":{"name":"Aquaculture and Fisheries","volume":"9 6","pages":"Pages 937-947"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78346294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Used vs. new: Does it have consequences for the performance of fishing gear? 新旧对比：这对渔具性能有影响吗？

Aquaculture and Fisheries Pub Date : 2024-11-01 DOI: 10.1016/j.aaf.2023.03.003

{"title":"Used vs. new: Does it have consequences for the performance of fishing gear?","authors":"","doi":"10.1016/j.aaf.2023.03.003","DOIUrl":"10.1016/j.aaf.2023.03.003","url":null,"abstract":"<div><div>Sea trials to test size selectivity equipment in trawls are often limited in time because they are costly, and the results can be influenced by multiple factors that are often overlooked. In the Barents Sea gadoid trawl fishery, the use of a size sorting grid in front of the codend is compulsory. The flexigrid, a netting section containing two flexible grids, is the most widely used grid section in this fishery. However, earlier selectivity studies with this device have shown inconclusive results. It has been speculated that the differences observed resulted from the difference in age and usage of the grid sections in the studies compared. To reveal whether potential changes in the device construction over time can lead to differences in size selection properties, we performed comparative fishing trials where we compared a brand new flexigrid section and a well-used flexigrid section used continuously by a commercial trawler for approximately four years. The results showed that the new flexigrid released significantly more cod below ∼60 cm than the used flexigrid. However, when the grids were fished with a subsequent diamond mesh codend, there was no difference in the overall selectivity of the two gears, meaning that the size selectivity in the codend compensates for the potential reduction in selectivity performance of the grids. This study shows the importance of considering the age and earlier use of size selection devices like sorting grids before they are compared with other devices, as their size selection properties can change significantly over time and with use.</div></div>","PeriodicalId":36894,"journal":{"name":"Aquaculture and Fisheries","volume":"9 6","pages":"Pages 981-988"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74943537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimal effort, fish farming, and marine reserve in fisheries management 渔业管理中的最佳努力、鱼类养殖和海洋保护区

Aquaculture and Fisheries Pub Date : 2024-11-01 DOI: 10.1016/j.aaf.2023.03.001

引用次数: 0

Synergistic effects of Recirculating Aquaculture System (RAS) with combination of clear water, probiotic and biofloc technology: A review 结合清水、益生菌和生物絮团技术的循环水养殖系统（RAS）的协同效应：综述

Aquaculture and Fisheries Pub Date : 2024-11-01 DOI: 10.1016/j.aaf.2023.07.006

{"title":"Synergistic effects of Recirculating Aquaculture System (RAS) with combination of clear water, probiotic and biofloc technology: A review","authors":"","doi":"10.1016/j.aaf.2023.07.006","DOIUrl":"10.1016/j.aaf.2023.07.006","url":null,"abstract":"<div><div>Recirculating Aquaculture System (RAS) is introduced in aquaculture farming industry to reduce water resource utilization, efficient the energy and land uses, and also help minimalize the water exchange. This system enables utilization of unsuitable land and promotes a sustainable environment in aquaculture industry. Furthermore, this technology has been established and proved efficient in monitoring the aquatic animal condition subsequently helps in maintaining the water quality and help remove solid particle wastes from the aquaculture treatment. As today, RAS has been developed with more effective technologies such as the use of UV irradiation, solid capture, protein skimmer and also provided with highly techno bio-filtration set. Basically, this system was applied for broodstock maturation, nursery phase, and grow-out production. In this review article, we provide an overview of RAS between the clear water, probiotic, and biofloc technology, and the advantages of its combination. Even though RAS and biofloc is two different parallel system, the application of the probiotic and biofloc in the semi-RAS application system is intense to be investigated. The synergistic effect of RAS using this combination towards high yield aquaculture production will be highlighted in this review paper. Expectantly this review paper will generate awareness and useful information on the RAS application in the aquaculture system operation with help in maximize the impact to the aquaculture yield production.</div></div>","PeriodicalId":36894,"journal":{"name":"Aquaculture and Fisheries","volume":"9 6","pages":"Pages 883-892"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73378125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0