Aquaculture最新文献

{"title":"Divergence patterns of bacterial communities between larviculture systems of two Penaeus vannamei strains with distinct culture traits","authors":"Heng Chen ,&nbsp;Fengdie Zhang ,&nbsp;Junqi Yu ,&nbsp;Rudan Chen ,&nbsp;Demin Zhang ,&nbsp;Chen Chen ,&nbsp;Kai Wang","doi":"10.1016/j.aquaculture.2025.742572","DOIUrl":"10.1016/j.aquaculture.2025.742572","url":null,"abstract":"<div><div>The culture traits of <em>Penaeus vannamei</em> strains and environmental management during larviculture are critical for ensuring postlarval quality and determining culture success. Establishing a beneficial larval microbiota is essential for larval health; however, the interplay between shrimp strain traits and water environment in shaping larval microbiota remains underexplored. We profiled the succession trajectories of bacterial communities in larvae and water from larviculture systems of two shrimp strains with distinct traits—stress-resistant and fast-growing—exhibiting different survival rates. Water environment, coupled with larval development, influenced larval bacterial alpha-diversity more than shrimp strain or bacterioplankton diversity. However, the combined effects of host developmental stage, water environment, and bacterioplankton composition shaped larval bacterial community composition. Both strains showed early-stage dominance of Vibrionaceae and post-mouth-opening enrichment of Roseobacteraceae, yet strain-specific divergence emerged at the <em>mysis</em> stage, marked by a surge in abundance-differential taxa persisting into the early <em>postlarvae</em> stage. This divergence was primarily driven by rare and conditionally rare taxa, suggesting a common microbiome shared between strains, with rare taxa recruited for strain-specific functions such as stress resistance. Our findings highlight the timing and characteristics of microbial and environmental divergence between larviculture systems of the shrimp strains with distinct culture traits, indicating complex interactions among host genetics, environmental factors, and microbiota that may influence larval survival. These insights imply the potential for microbiome-assisted breeding strategies in shrimp aquaculture—an avenue worthy of further exploration.</div></div>","PeriodicalId":8375,"journal":{"name":"Aquaculture","volume":"606 ","pages":"Article 742572"},"PeriodicalIF":3.9,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143844898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multi-beam sonars for monitoring the distribution and welfare of fish reared in sea cages - strengths and challenges","authors":"Kana Banno,&nbsp;Sihan Gao,&nbsp;Christian Stolz,&nbsp;Stig Atle Tuene,&nbsp;Grete Hansen Aas,&nbsp;Lars Christian Gansel","doi":"10.1016/j.aquaculture.2025.742553","DOIUrl":"10.1016/j.aquaculture.2025.742553","url":null,"abstract":"<div><div>Fish position themselves in sea cages based on internal and external clues, and their spatial distribution can be used to assess fish welfare. However, monitoring the spatial distribution of fish in commercial cages is challenging due to the large amount of fish and size of such cages. Recently, a monitoring methodology using a multi-beam sonar was tested at commercial scale cages for Atlantic salmon, and used to visualize the fish distribution in almost the entire cage volume. In the present study, this methodology was applied to monitor their distribution in a commercial cage for 24 h at a density considered normal to high in commercial production. In this study, we compared fish distribution monitored by the multi-beam sonar with expected behavioural patterns and evaluated whether the use of the multi-beam sonar brought new information in comparison to the use of underwater cameras. Strong shadowing effects were present in 40 % of the collected sonar data files, but the multi-beam sonar was able to detect fish in the entire sea cage in 51 % of the files. While the camera data showed that fish densities were “high” at all monitored locations, the sonar data revealed some clusters of higher fish densities at various locations of the cage, and showed that fish distribution was never truly uniform. In conclusion, the multi-beam sonars can bring more representative and high-resolution information of the fish distribution compared to underwater cameras, which can improve fish welfare assessment based on their spatial distribution.</div></div>","PeriodicalId":8375,"journal":{"name":"Aquaculture","volume":"606 ","pages":"Article 742553"},"PeriodicalIF":3.9,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143844280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The substitution of fish meal-soybean meal mixture with fermented soybean meal promoted the growth of bullfrogs (Lithobates catesbeianus) to the same performance as florfenicol addition through positively affecting intestinal health and microbiota","authors":"Yunfeng Chen ,&nbsp;Ruijun Zhu ,&nbsp;Zhongchao Sun ,&nbsp;Xu Yang ,&nbsp;Yang Fan ,&nbsp;Xinru Li ,&nbsp;Xiaoqin Li ,&nbsp;Xiangjun Leng","doi":"10.1016/j.aquaculture.2025.742559","DOIUrl":"10.1016/j.aquaculture.2025.742559","url":null,"abstract":"<div><div>The aim of this experiment was to investigate the effect of fermented soybean meal (FSBM) replacing fish meal (FM) + soybean meal (SBM) on growth, serum biochemical indices, liver and intestinal histology, intestinal digestive enzyme activities and microbial composition of bullfrogs (<em>Lithobates catesbeianus</em>). The basal diet contained 100.0 g/kg of FM and 290.0 g/kg of SBM, then 40.0 g/kg, 80.0 g/kg of FSBM was used to replace the same amount of FM-SBM mixture (1:3) (FSBM40, FSBM80). In addition, 2.0 g/kg florfenicol (10 % purity) was added into basal diet to form the antibiotic diet (ANTI). The above four isonitrogenous diets were fed to bullfrogs with initial body weight of 45.5 ± 0.4 g for 50 days. The FSBM80 and ANTI groups presented significantly higher weight gain and lower feed conversation ratio than the control group (<em>P &lt;</em> 0.05), while no significant difference was detected among the three groups of FSBM40, FSBM80 and ANTI (<em>P</em> &gt; 0.05). The ANTI group also showed significantly higher condition factor than the control group and significantly higher mesenteric fat index than the other three groups (<em>P &lt;</em> 0.05). The florfenicol content in the muscle of ANTI group was 19.9 μg/kg, but it was not detected in the other three groups. The serum lysozyme activity, liver total superoxide dismutase, catalase activities, total antioxidant capacity, intestinal muscle thickness were significantly increased, and serum aspartate aminotransferase, alanine aminotransferase activities and liver malondialdehyde content were significantly decreased in the FSBM80 group when compared to the control group (<em>P &lt;</em> 0.05). Trypsin, α-amylase activity and lipase activity were significantly higher in FSBM80 and ANTI groups than those in the control group (<em>P &lt;</em> 0.05). Compared with the control group, the ANTI group presented significantly higher malondialdehyde content in liver and incomplete hepatocyte structure (<em>P &lt;</em> 0.05). In terms of intestinal microorganisms, the FSBM80 group revealed higher indices of sobs, shannon, ace, chao, higher abundance of Fusobacteriota, Proteobacteria and lower abundance of Bacteroidota and <em>Mycoplasma</em> than the control group, while the ANTI group showed significantly lower sobs, shannon and chao indices than the FSBM80 group, and lower Ace index than the control group (<em>P &lt;</em> 0.05). In conclusion, the replacement of 80 g/kg FM-SBM mixture (1,3) with 80 g/kg FSBM promoted the growth performance of bullfrogs to the same level as the antibiotic group, enhanced the intestinal digestive enzymes activity, and positively regulated the intestinal microorganism community.</div></div>","PeriodicalId":8375,"journal":{"name":"Aquaculture","volume":"605 ","pages":"Article 742559"},"PeriodicalIF":3.9,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143826078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fraxetin as a promising natural agent for controlling white spot syndrome virus: Mechanistic insights and application potential","authors":"Cheng Chen ,&nbsp;Kai-Yuan Lu ,&nbsp;Chang-Shuai Liang ,&nbsp;Tao Liu ,&nbsp;Qing Yu ,&nbsp;Peng-Fei Li ,&nbsp;Fei Ling ,&nbsp;Gao-Xue Wang","doi":"10.1016/j.aquaculture.2025.742565","DOIUrl":"10.1016/j.aquaculture.2025.742565","url":null,"abstract":"<div><div>Against the backdrop of the rapid growth of the global crustacean aquaculture industry and the increasingly complex and variable farming environments, White Spot Syndrome Virus (WSSV) has emerged as a major bottleneck in the industry, causing White Spot Disease (WSD) and resulting in significant economic losses annually. However, effective control strategies for this highly contagious viral disease are currently lacking. This study focuses on exploring natural medicinal resources and identifies <em>Fraxinus chinensis</em> Roxb. from 20 medicinal herbs as an effective inhibitor of WSSV proliferation. Its active compound, fraxetin, demonstrated excellent inhibitory effects (97.29 %, 75 mg/kg). Further studies have shown that fraxetin can effectively reduce viral replication in a concentration-dependent manner, downregulate viral gene transcription levels, and significantly increase the survival rate of crayfish infected with WSSV. Additionally, in both preventive/therapeutic administration and static cohabitation models, fraxetin effectively suppresses viral load and blocks horizontal transmission of WSSV, demonstrating its potential as a broad-spectrum control strategy. Mechanistically, fraxetin initially interferes with the expression of viral genes that play a crucial role in initiating WSSV transcription. It also weakens the viral genes' ability to hijack innate immune signaling pathways, thereby disrupting the viral replication cycle. Furthermore, fraxetin modulates various enzyme activities, effectively balancing oxidative stress and inflammatory damage triggered by WSSV infection, promoting the restoration of protein homeostasis, and enhancing its antiviral efficacy within crayfish. Given the established biosynthetic basis for fraxetin, this study provides a solid theoretical foundation for its use as an effective candidate to control WSSV outbreaks, promising significant contributions to the sustainable development of the aquaculture industry.</div></div>","PeriodicalId":8375,"journal":{"name":"Aquaculture","volume":"605 ","pages":"Article 742565"},"PeriodicalIF":3.9,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143828913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative study on nucleic acid amplification based detection methods for acute hepatopancreatic necrosis in Penaeus vannamei","authors":"Jinyu Yang ,&nbsp;Lu Zhang ,&nbsp;Qifan Zeng ,&nbsp;Jingjie Hu ,&nbsp;Mengqiang Wang","doi":"10.1016/j.aquaculture.2025.742564","DOIUrl":"10.1016/j.aquaculture.2025.742564","url":null,"abstract":"<div><div>Acute hepatopancreatic necrosis disease (AHPND), primarily caused by certain strain of <em>Vibrio parahaemolyticus</em>, refers to severe mortality rate up to 100 %, and posed a significant threat to the global shrimp aquaculture. Currently, various molecular diagnostic techniques for AHPND, such as, conventional polymerase chain reaction (PCR), nested PCR, quantitative real-time PCR (qPCR), loop-mediated Isothermal amplification (LAMP), and recombinase polymerase amplification (RPA), have been developed and continuously optimized. However, comparative studies on the performance of these methods are lacking. This study compared various published molecular diagnostic approaches, in terms of sensitivity, specificity, stability, and practical efficacy. A total of five kinds of methods were compared in this study. The sensitivity of PCR-1 and PCR-2 achieved 1.77 × 10² copies/μL and 1.77 × 10³ copies/μL, respectively; qPCR-1, qPCR-2, and qPCR-3 had limits of 1.77 × 10² copies/μL, 1.77 × 10¹ copies/μL, and 1.77 × 10³ copies/μL, respectively; nested PCR reached 1.77 × 10⁰ copies/μL. In isothermal amplification methods, LAMP-1 and LAMP-2 reached 1.77 × 10³ copies/μL, while RPA-1, RPA-2, and RPA-3 detected 1.77 × 10¹ copies/μL, 1.77 × 10¹ copies/μL, and 1.77 × 10³ copies/μL, respectively. All methods reliably detected the target gene, exhibiting robust specificity. Stability assessments showed minimal interference at low DNA concentrations, while at high concentrations, both conventional PCR and three RPA methods remained unaffected. In terms of detection accuracy, conventional PCR showed detection rates of 75 % for PCR-1 and 87.5 % for PCR-2; qPCR reached 100 % detection for qPCR-1, qPCR-2, and qPCR-3; nested PCR had an 87.5 % detection rate, LAMP achieved 75 % and 100 % for LAMP-1 and LAMP-2, respectively; and RPA reported 100 % detection for RPA-1 and RPA-2, with RPA-3 at 75 %. Notably, qPCR and nested PCR performed well. Generally, RPA-1 has good sensitivity (1.77 × 10¹ copies/μL), specificity, stability, and the detection rate of actual samples reaches 100 %. At the same time, RPA had the shortest reaction time and did not require expensive reaction equipment.</div></div>","PeriodicalId":8375,"journal":{"name":"Aquaculture","volume":"605 ","pages":"Article 742564"},"PeriodicalIF":3.9,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143826076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization and functional analysis of CsTLR13M/13S, two novel teleost toll-like receptor 13 in antimicrobial immunity","authors":"Ji-xing Feng,&nbsp;Sheng-jia Wang,&nbsp;Hong-ye Wang,&nbsp;Xue-peng Li","doi":"10.1016/j.aquaculture.2025.742523","DOIUrl":"10.1016/j.aquaculture.2025.742523","url":null,"abstract":"<div><div>In mammals, toll-like receptors 13 (TLR13), as an intracellular endosomal TLR, recognizes various pathogenic microorganism, playing vital roles in the first line of host immunity through myeloid differentiation factor 88 (MyD88) signaling pathway. However, the anti-microbial effect of teleost TLR13 is largely obscure. Here, we reported the expression patterns, signaling pathway and immune property of tongue sole (<em>Cynoglossus semilaevis</em>) TLR13 (CsTLR13). The membrane form of CsTLR13 (CsTLR13M) contains three domain, i.e. extracellular domain (ECD), cytoplasmic TIR domain and transmembrane (TM) domain; the soluble form of CsTLR13 (CsTLR13S) only contains single ECD. CsTLR13M/CsTLR13S share 77.5 % identity with each other, with the same 19 LRRs in the ECD. <em>CsTLR13M/CsTLR13S</em> were constitutively existed in different tissues with similar expression patterns, and regulated by bacterial and viral infection. Recombinant CsTLR13S (rCsTLR13S) could bind to bacteria, with the highest affinity to <em>P. fluorescens</em>, and inhibited the growth of bacteria. In vivo, knockdown of <em>CsTLR13M/CsTLR13S</em> markedly enhanced bacterial infection. Consistently, <em>CsTLR13M/CsTLR13S</em>-deficient peripheral blood leukocytes (PBLs) revealed reduced expression of pro-inflammatory genes, <em>MyD88</em>-signaling related genes, and ROS production, which in line with rCsTLR13S activated the expression of pro-inflammatory and <em>MyD88</em>-signaling related genes. Overall, our findings give new insights into the signaling pathway and function of CsTLR13 in teleost immunity.</div></div>","PeriodicalId":8375,"journal":{"name":"Aquaculture","volume":"605 ","pages":"Article 742523"},"PeriodicalIF":3.9,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143833708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of the psychrotrophic marine yeast Yarrowia bubula as potential feed for Artemia salina","authors":"Sayali Haldule ,&nbsp;Akanksha Kashikar ,&nbsp;Smita Zinjarde","doi":"10.1016/j.aquaculture.2025.742561","DOIUrl":"10.1016/j.aquaculture.2025.742561","url":null,"abstract":"<div><div>Aquaculture is a rapidly growing food producing sector that is vulnerable to disease outbreaks. Since persistent application of antibiotics is associated with certain drawbacks, current focus on enhancing performance of aquaculture species is via use of environment-friendly nutritional supplementations, probiotic preparations and immunostimulants. Microorganisms belonging to ‘Generally Regarded as Safe’ category capable of utilizing low-cost substrates, containing high protein contents and exhibiting desirable fatty acid profiles are important in this regard. In current study, a psychrotrophic marine yeast <em>Yarrowia bubula</em> capable of growing on waste cooking oil (WCO), whey and raw glycerol was assessed for its potential as aquaculture feed. When concentrations of substrates were varied individually, maximum biomass was obtained when WCO, whey and glycerol were provided at 1.5, 50 and 1 % levels, respectively. Effect of the obtained biomass on the crustacean model system <em>Artemia salina</em> was studied with respect to its growth, survival and resistance towards aquaculture pathogens. Biomass of <em>Saccharomyces cerevisiae</em> and <em>Y. bubula</em> grown on glucose were considered as ‘control’ samples (C1 and C2, respectively). While, <em>Y. bubula</em> cultivated on WCO (F1), whey (F2) and glycerol (F3) were the ‘test’ feed samples. Crustaceans fed with F3 samples were bigger in size and exhibited well-developed appendages. Moreover, <em>A. salina</em> groups fed with F3 and F1 feeds displayed better survival of 88.89 ± 7.70 and 79.99 ± 11.55 %, respectively. Compared to other diets, specimens fed with these two diets showed enhanced resistance towards <em>Vibrio harveyi</em> (F3: 44.44 ± 10.18 % and F1: 39.99 ± 6.67 %) and <em>Pseudomonas aeruginosa</em> (F3: 68.88 ± 3.85 % and F1: 62.22 ± 3.85 %). There was upregulation of <em>hsp70</em>, <em>tgase</em> and <em>proPO</em> mRNA levels in groups of larvae fed with <em>Y. bubula</em> diets C2, F1, F2 and F3, compared to those fed with <em>S. cerevisiae</em> C1, suggestive of the former biomass being instrumental in enhancing immunity. Pearson correlation analysis indicated that total protein, lipid contents and fatty acid compositions of <em>Y. bubula</em> were key factors contributing towards increased survival, disease resistance and expression of immune related genes (<em>hsp70</em> and <em>proPO</em>) in <em>A. salina</em>. This study is the first report that shows the potential of <em>Y. bubula</em> capable of growing on low-cost substrates in improving survival, overall health and immune responses in aquaculture species.</div></div>","PeriodicalId":8375,"journal":{"name":"Aquaculture","volume":"605 ","pages":"Article 742561"},"PeriodicalIF":3.9,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143824010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparing the modulatory effect of fennel powder and fennel extract nanoparticles on growth, immunity and histopathological changes of Nile tilapia","authors":"Shaimaa A.A. Ahmed ,&nbsp;Abdelhakeem El-Murr ,&nbsp;Yasser Abd Elhakim ,&nbsp;Elsayed M. Younis ,&nbsp;Abdelwahab A. Abdelwarith ,&nbsp;Simon J. Davies ,&nbsp;Mohamed M. Metwally ,&nbsp;Amany Abd El Aziz Gharib ,&nbsp;Enas N.M. Khalil","doi":"10.1016/j.aquaculture.2025.742566","DOIUrl":"10.1016/j.aquaculture.2025.742566","url":null,"abstract":"<div><div>A sixty-day feeding trial was performed to assess the impact of fennel powder (“FP) and fennel extracts nanoparticles (FNPs) in enhancing the growth performance, antioxidant capacity. The immune system's ability to fend against <em>P. putida</em> infection was also assayed. Nile tilapia (<em>n</em> = 225, 27.15 ± 0.12 g) were segregated into five equal groups in triplicates (45 fish/ group, 15 fish/ replicate). The initial (control) group received diet devoid of any feed supplements, whereas the second (FP 0.5) and third (FP 1) ones received diet enriched with 0.5 % and 1 % fennel powder (FP) respectively. The fourth (FNPs 0.5) and the fifth (FNPs 1) groups received a basal diet enriched with 0.5 % and 1 % (FNPs) respectively. At the end of feeding trial; fifteen fish from each group, were intraperitoneally (I/P) inoculated with <em>P. putida.</em> The challenged fish were monitored for fourteen days, where mortalities, behavioral modification and clinical signs were documented<em>.</em> Results depicted that, FP and/or FNPs- enriched groups showed a substantial improvement in all growth indices compared to the control group. The immunological response biomarkers involving lysozyme (32.07 μg/mL), NO (47.67 μmol/L), and IgM (40.26 μg/mL) were uniquely improved in the FNPs 1 group when compared to their values in the control group(16.37, 34.88, and 26.28, respectively). In addition, FNPs 1group also displayed major improvement in the activity of hepatic oxidative stress biomarkers: CAT (22.93 U/G), SOD (9.17 U/g), and GSH (2.92 mmol/g). Following the challenge with <em>P. putida</em>, the highest survivability percentage was noted in FNPs 1 (88.66 %), followed by FNPs 0.5 (73.33 %), and then, FN1 (66.66 %). Eventually, it could be concluded that FNPs, particularly, with higher concentrations could be used as a promising dietary supplement to enhance growth and immunological response as well as to safeguard Nile tilapia against <em>P. putida</em> infection.</div></div>","PeriodicalId":8375,"journal":{"name":"Aquaculture","volume":"605 ","pages":"Article 742566"},"PeriodicalIF":3.9,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143826074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Plasma biochemistry of visually asymptomatic hatchery-reared juvenile pallid sturgeon Scaphirhynchus albus exposed to Missouri River sturgeon Iridovirus","authors":"Matea A. Djokic ,&nbsp;Kevin M. Kappenman ,&nbsp;Christine E. Verhille","doi":"10.1016/j.aquaculture.2025.742568","DOIUrl":"10.1016/j.aquaculture.2025.742568","url":null,"abstract":"<div><div>Hemoglobin and plasma biochemistry can be informative of important health metrics such as nutritional status, tissue damage or disease, and stress in fish and may be important to population monitoring. The pallid sturgeon (<em>Scaphirhynchus albus</em>) is a long-lived, endangered species native to North America. Pallid sturgeon are closely monitored for health, condition, abundance, distribution, and survival in the Missouri and Mississippi Rivers and are reared in hatcheries in efforts to recover the species, but analytes have not been thoroughly investigated for wild or hatchery-held pallid sturgeon. In this study, we measured 20 biochemistry analytes in asymptomatic hatchery-reared juvenile pallid sturgeon after a Missouri River Sturgeon Iridovirus outbreak and report 95 % confidence intervals for 12 of these analytes (based on Reference Interval [RI] statistical approaches) and minimum and maximum values for an additional six. This study is the first characterization of a broad suite of juvenile pallid sturgeon biochemistry values. Future studies to determine biochemistry RIs of confirmed healthy pallid sturgeon for comparison with pallid sturgeon of variable environmental, rearing, and health will be informative.</div></div>","PeriodicalId":8375,"journal":{"name":"Aquaculture","volume":"606 ","pages":"Article 742568"},"PeriodicalIF":3.9,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143850308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Descaling did not affect osmoregulation, growth or mortality in Atlantic salmon smolts after transfer to brackish or sea water","authors":"Jonatan Nilsson,&nbsp;Angelico Madaro","doi":"10.1016/j.aquaculture.2025.742526","DOIUrl":"10.1016/j.aquaculture.2025.742526","url":null,"abstract":"<div><div>Scale loss is often a result of various mechanical impact such as handling and is assumed to increase the risk of impaired osmoregulation and disease. For this reason, scale loss is a commonly used welfare indicator for farmed fish. Knowledge about the consequences scale loss has for fish welfare under different conditions is however limited, especially the long-term effects. We studied the effect of removal of scales on 0 (control) 5, 10 or 20 % of the scale covered body area on individually tagged Atlantic salmon (<em>Salmo salar</em>, Linnaeus) smolts. Descaling was done at the transfer from freshwater to either brackish (25 ppt) or full-strength seawater (34 ppt) at an optimal temperature (10 °C) that was kept stable during the 6-weeks study period. Fish were sampled for blood and examined for wounds after 1, 7 and 42 days. No fish had wounds at any of the sampling occasions, and no fish in any treatment died during the experimental period. Although all plasma parameters measured (concentration of plasma cortisol, glucose, lactate, Cl⁻, Na⁺, K⁺, and Ca²⁺) were affected by sampling day and/or salinity, scale loss did not have a significant effect on any of the plasma parameters. Neither did scale loss affect growth. Thus, no negative effects of scale loss on salmon welfare could be documented in the present study. Scale loss may still have negative effects in more challenging conditions, which should be investigated in more detail.</div></div>","PeriodicalId":8375,"journal":{"name":"Aquaculture","volume":"605 ","pages":"Article 742526"},"PeriodicalIF":3.9,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143817309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}