Aquaculture Research最新文献

{"title":"Exploring the Transition to Circular Mussel Farming in Italy: Farmers’ Perceptions and Scenario-Based Cost Implications of Recycled and Bioplastic Nets","authors":"E. S. Marrocco,&nbsp;E. Dolfi,&nbsp;G. Yeter,&nbsp;M. Masi,&nbsp;Y. Vecchio,&nbsp;A. Bonaldo,&nbsp;F. Adinolfi","doi":"10.1155/are/7050137","DOIUrl":"https://doi.org/10.1155/are/7050137","url":null,"abstract":"<p>Mussel aquaculture plays an important role in the economies and livelihoods of coastal communities, supporting income generation, employment, and the preservation of local production traditions. However, the sector relies heavily on plastic materials, particularly polypropylene (PP) nets, whose extensive use raises environmental concerns related to marine pollution. While interest in biodegradable and recycled alternatives is growing, their adoption remains limited by technical, economic, organizational, and market barriers. This exploratory study examines the perceptions of a nonrandom sample of 22 mussel farmers operating in Italy regarding the use of alternative materials for farming nets, identifying perceived drivers and obstacles to their adoption. Using a contingent valuation approach, the study describes farmers’ stated willingness to pay (WTP) for recycled polypropylene (RPP) and biodegradable and compostable plastic (BP) nets. Among respondents who provided valid WTP responses, the median WTP was €4.5/kg in both the preinformation and postinformation elicitation conditions for RPP nets (<i>n</i> = 14) and BP nets (<i>n</i> = 15); the corresponding mean values ranged from €4.11 to €4.17/kg. The results suggest that concerns about quality, high costs, and limited consumer acceptance are relevant perceived barriers within the surveyed sample. A simplified parametric scenario model was then used to compare farmers’ perceptions with indicative cost implications under specific market and operational assumptions. The simulations suggest that, under selected assumptions, mixed-material strategies combining conventional and alternative polymers may generate costs close to those of conventional plastic nets within the scenario considered. The findings provide exploratory and sample-specific evidence on the perceived and economic conditions that may shape the adoption of alternative net materials among the surveyed mussel farmers in Italy.</p>","PeriodicalId":8104,"journal":{"name":"Aquaculture Research","volume":"2026 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/are/7050137","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149048091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Concentration-Specific Effects of Dietary 20-Hydroxyecdysone on Growth, Ovarian Development, Endocrine-Related Gene Expression, and Gut Microbiota of Macrobrachium rosenbergii Under a Fixed Methyl Farnesoate Background","authors":"Jie Wei,&nbsp;Sikai Xu,&nbsp;Yakun Wang,&nbsp;Qian Wang,&nbsp;Zikang Tu,&nbsp;Kunhao Hong,&nbsp;Qiaoyan Zhou,&nbsp;Tianhui Jiao,&nbsp;Yayi Huang,&nbsp;Guoliang Ruan,&nbsp;Lingyun Yu","doi":"10.1155/are/4857240","DOIUrl":"https://doi.org/10.1155/are/4857240","url":null,"abstract":"<p>Methyl farnesoate (MF) and 20-hydroxyecdysone (20E) are crucial hormones playing pivotal roles in crustacean growth and reproduction. However, the effects of 20E supplementation under a high MF background in <i>Macrobrachium rosenbergii</i> remain poorly understood. To explicitly address this, all experimental treatments in the present study received a fixed baseline dietary background of MF (9 μg/g) to establish a prestimulated endocrine state. Under this fixed background, the effects of graded dietary 20E (0, 0.2, 2, and 20 μg/g) on the growth performance, ovarian development, endocrine-related gene expression, and gut microbiota of <i>M. rosenbergii</i> were systematically evaluated (no hormone-free or 20E-only controls were included). Results demonstrated a nonlinear, concentration-specific response in somatic growth: a moderate nominal 20E supplementation level (2 μg/g) produced the highest weight gain, whereas the highest level (20 μg/g) did not further enhance growth. Consistently, this moderate nominal level upregulated retinoid X receptor (<i>RXR</i>) and ecdysone receptor (<i>EcR</i>) transcript abundances in the hepatopancreas across most sampling time points but did not promote vitellogenin (<i>Vtg</i>) transcription in the ovary or elevate hemolymph <i>Vtg</i> levels. Histological analysis indicated that while the MF-alone treatment accelerated ovarian development, the addition of 20E—particularly at the high nominal level—was associated with a slower transition of oocytes from the Oc2 stage to more advanced stages relative to the MF-only treatment. Additionally, 16S rRNA sequencing revealed that 20E treatments significantly reduced intestinal alpha diversity. While global beta-diversity analysis indicated that the overall community structure was not significantly altered, differential abundance testing revealed that 20E induced significant taxon-specific modulations, characterized notably by an increase in the relative abundance of <i>Pseudomonadota</i> and a corresponding decrease in <i>Bacillota</i>. In conclusion, dietary 20E supplementation under a high-MF background exhibits nonlinear, nominal supplementation level-specific effects on growth performance, gene expression, and ovarian development, alongside associative changes in the gut microbiota. Overall, these findings provide practical, context-dependent insights into the complex endocrine interactions relevant for optimizing hormone applications in crustacean aquaculture.</p>","PeriodicalId":8104,"journal":{"name":"Aquaculture Research","volume":"2026 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/are/4857240","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149048039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative Evaluation of Conventional and Biofloc-Based System for Enhancing Production Efficiency of Singhi Catfish, Heteropneustes fossilis, at Intensified Stocking Densities","authors":"Md Aklakur,&nbsp;Md Imran Shah,&nbsp;Udipta Roy,&nbsp;Potluri Sai Kishore,&nbsp;Ankush Lala Kamble,&nbsp;Sourav Bhadra,&nbsp;Subam Debroy,&nbsp;Chittaranjan Raul,&nbsp;Liza Dutta","doi":"10.1155/are/2534379","DOIUrl":"https://doi.org/10.1155/are/2534379","url":null,"abstract":"<p>Singhi fry (1.01 ± 0.01g) were reared for 240 days at five different stocking densities in biofloc and non biofloc culture systems to evaluate the comparative effects on production performance. The experimental treatments comprised of a control (nonbiofloc) and treatments (biofloc) with increasing stocking density i.e. 250 fish m⁻³ (T1), 300 fish m⁻³ (T2), 350 fish m⁻³ (T3) and 400 fish m⁻³ (T4). Throughout the experiment, fishes were fed with a supplemented commercial diet containing 40.35 ± 1.11% crude protein and 6.16 ± 0.15% crude lipid. Results indicated higher (<i>p</i> ≤ 0.05) growth performance, carcass quality, and survivability at a stocking density of 250–300 fish m⁻³. Higher (<i>p</i> ≤ 0.05) growth performance and nutrient utilization indices were recorded in biofloc groups compared to nonbiofloc groups. Digestive enzyme indices suggest higher amylase, protease, and lipase activity in T1 and T2 groups (<i>p</i> ≤ 0.05) complementing feed utilization and efficiency, whereas oxidative stress indices suggest increased crowding stress in higher stocking densities (<i>p</i> ≤ 0.05) (T3 and T4). Hematological and serum biochemical indices identified significantly higher (<i>p</i> ≤ 0.05) hemoglobin (Hb), TEC and significantly lower (<i>p</i> ≤ 0.05) TLC, total protein, albumin, globiulin, glucose, serum glutamic-oxaloacetic transaminase (SGOT) in both T1 and T2 groups which justifies better physiological welfare at 250–300 m⁻³ stocking density. In the case of water-use efficiency, the biofloc systems utilized 50% less water than nonbiofloc systems, suggesting higher productivity and water-use efficiency. Higher revenue, benefit–cost ratio, return on investment, and lesser payback period, and the break-even point in T1 and T2 suggest 250–300 m⁻³ is ideal in terms of economic and cost-effective production of Singhi in the commercial biofloc-based setup.</p>","PeriodicalId":8104,"journal":{"name":"Aquaculture Research","volume":"2026 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/are/2534379","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149048040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sublethal Cypermethrin Exposure Induces Systemic Toxicity in Nile Tilapia (Oreochromis niloticus): An Integrated Biomarker and Quantitative Histopathological Assessment","authors":"Maria Binte Moin,&nbsp;Shaon Kumar Mondol,&nbsp;Sadia Ibnat,&nbsp;Md Hashibur Rahman,&nbsp;Sungchul C. Bai,&nbsp;Taesun Min,&nbsp;Mohammad Moniruzzaman,&nbsp;Zakir Hossain","doi":"10.1155/are/3913277","DOIUrl":"https://doi.org/10.1155/are/3913277","url":null,"abstract":"<p>Cypermethrin is a synthetic pyrethroid insecticide widely used in agriculture and is frequently detected in aquatic environments through surface runoff. This study evaluated the acute and sublethal toxicity of cypermethrin in Nile tilapia (<i>Oreochromis niloticus</i>) using an integrated biomarker approach. The 96-h LC₅₀ value was estimated to be 0.668 ppm, and fish were subsequently exposed for 7 days to three sublethal concentrations corresponding to 25%, 50%, and 75% of the LC₅₀. Hematological, biochemical, antioxidant, neurotoxicity, and histopathological responses were assessed, and tissue alterations were further quantified using ImageJ-based histomorphometric analysis. Cypermethrin exposure induced significant hematological alterations, including decreased red blood cell count and hemoglobin level, and increased white blood cell (WBC) count, blood glucose, and serum protein levels. Antioxidant enzyme activities and malondialdehyde levels increased significantly, whereas total antioxidant capacity decreased, indicating oxidative stress. Acetylcholinesterase activity was significantly inhibited, suggesting neurotoxicity, while increased aspartate aminotransferase, alanine aminotransferase, and alkaline phosphatase activities indicated hepatic impairment. Histopathological examination revealed concentration-dependent lesions in the liver, gill, and intestine, including vacuolation, hemorrhage, necrosis, lamellar fusion, and epithelial disruption. Quantitative histological analysis confirmed a significant increase in altered tissue area in cypermethrin-exposed fish. These findings demonstrate that sublethal cypermethrin exposure induces systemic physiological and tissue-level alterations in <i>O. niloticus</i> and support the use of quantitative histopathology as a complementary tool in aquatic ecotoxicological assessment.</p>","PeriodicalId":8104,"journal":{"name":"Aquaculture Research","volume":"2026 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/are/3913277","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148994224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Egg Quality Differences Between Wild and Hatchery-Reared Bloater (Coregonus hoyi)","authors":"Celine M. E. Lajoie,&nbsp;Tim Drew,&nbsp;Michael T. Arts,&nbsp;Ryan Wehse,&nbsp;Jacques Rinchard,&nbsp;Grayson E. Tellier,&nbsp;Trevor E. Pitcher","doi":"10.1155/are/8921935","DOIUrl":"https://doi.org/10.1155/are/8921935","url":null,"abstract":"<p>Coregonines are ecologically and culturally important in the Laurentian Great Lakes, and restoration efforts increasingly rely on hatchery propagation to reestablish extirpated populations. However, artificial rearing may alter life history traits that influence recruitment success. We compared maternal traits and egg quality between wild-origin and hatchery-reared Bloater (<i>Coregonus hoyi</i>) from the Lake Michigan source population used in Lake Ontario restoration. Hatchery females were larger and in higher condition but produced smaller eggs (relative to body size) with lower carotenoid concentrations. Although total egg lipid content did not differ, fatty acid profiles diverged: Hatchery eggs contained more monounsaturated fatty acids (MUFAs) and docosahexaenoic acid (DHA), whereas wild eggs were enriched in arachidonic acid (ARA) and eicosapentaenoic acid (EPA), resulting in higher lipid unsaturation. These differences likely reflect dietary mismatches between hatchery feeds and natural prey and may reduce offspring performance in cold, oligotrophic environments. Our findings suggest that improving broodstock diets may be one way to enhance restoration success.</p>","PeriodicalId":8104,"journal":{"name":"Aquaculture Research","volume":"2026 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/are/8921935","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148994009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development and Growth of Phoxinus lagowskii (Dybowsky): A Comprehensive Ontogenetic Atlas","authors":"Mingshuai Shu,&nbsp;Ruining Zhang,&nbsp;Xiaonian Luo,&nbsp;Yuxian Chen,&nbsp;Yi Sun,&nbsp;Lie Zhang,&nbsp;Jun Li","doi":"10.1155/are/5905058","DOIUrl":"https://doi.org/10.1155/are/5905058","url":null,"abstract":"<p><i>Phoxinus lagowskii</i> is an ecologically important species in river ecosystems and an emerging candidate for aquaculture. The developmental patterns of <i>P. lagowskii</i> and the defining traits of its critical metamorphic windows provide valuable insights into the species’ early life history and aquaculture. In the present study, histomorphological methods were employed to investigate the growth and development of <i>P. lagowskii</i>. A series of experiments was conducted, including broodstock rearing; induced spawning; artificial fertilization; the characterization of early embryonic development; and detailed investigations of larval, juvenile, and adult growth. The results showed that secondary sexual characteristics differed markedly between males and females during the breeding season. Embryonic development proceeds as a continuous process, delineated into six sequential phases: fertilization, cleavage, blastulation, gastrulation, neurulation, and organogenesis. At a water temperature of 14 ± 1°C, the spawning, fertilization, and hatching rates were 77.86% ± 8.96%, 84.67% ± 6.11%, and 64.00% ± 9.85%, respectively. Approximately 568,300 larvae hatched, with a total length (TL) of 4.14 ± 0.17 mm and a body weight (BW) of 0.6 mg. Postembryonic development was described from 0 to 42 days post-hatch at 14–24°C. Under pond culture conditions, the survival rate of first-year <i>P. lagowskii</i> reached 95.20% ± 1.50%, and four morphometric parameters—BW, TL, standard length (SL), and body depth (BD)—increased significantly over time. In the second year, both BW and SL continued to increase. Principal component analysis (PCA) revealed a strong synergistic relationship between water temperature and growth indices. In the third year, during the breeding season, individuals attained sexual maturity and exhibited well-developed secondary sexual characteristics. A histological examination of the gonads confirmed that all sampled specimens had reached reproductive maturity. These findings establish a scientific basis and technical framework for large-scale production, genetic improvement, and germplasm resource conservation in <i>P. lagowskii</i>.</p>","PeriodicalId":8104,"journal":{"name":"Aquaculture Research","volume":"2026 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/are/5905058","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148943554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Levels, Determinants and Effects of Polychlorinated Biphenyls and Organochlorine Pesticides in Fish in Lake Victoria, Kenya","authors":"Joseph Okal,&nbsp;Tobias Odhiambo,&nbsp;Kingdom Simfukwe,&nbsp;Jane Mburu,&nbsp;Austin Mtethiwa,&nbsp;Evalyn Mwihia","doi":"10.1155/are/8502242","DOIUrl":"https://doi.org/10.1155/are/8502242","url":null,"abstract":"<p>Polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) are persistent organic pollutants (POPs) that are highly toxic even at low concentrations and bioaccumulate through aquatic food webs. This study quantified PCBs and OCPs concentrations using GC–MS analysis in 36 pooled samples from 154 Nile tilapia (<i>Oreochromis niloticus</i>) and assessed associated hepatic histopathological changes, as well as perceived pollution sources across five sites on the Kenyan side of Lake Victoria. Overall, detected concentrations were low, with most compounds below detection limits in the majority of samples and sites. Only γ-HCH and PCB-77 were consistently detected across all five locations. Mean concentrations (ng/g wet weight) in fish muscles were α-HCH (0.0141 ± 0.0849), γ-HCH (0.0249 ± 0.0330), trans-chlordane (0.0117 ± 0.0488), PCB-77 (0.0041 ± 0.0055), PCB-81 (0.0008 ± 0.0048), PCB-156 (0.0017 ± 0.0048), PCB-167 (0.0029 ± 0.0062) and PCB-169 (0.0005 ± 0.0033). There were also weak correlations between PCBs and OCPs, suggesting limited co-occurrence patterns. Histopathological examination revealed clear hepatic alterations, with hepatic congestion being the most prevalent lesion, while inflammatory cell infiltration, melano-macrophage centres (MMCs), nuclear alterations and vacuolar degeneration occurred less frequently. Perception surveys indicated agriculture, livestock farming and pesticide use as key sources of OCPs, while urban runoff, industrial effluents and wastewater discharge were identified as major perceived PCBs sources. Although contaminant levels were low, continuous monitoring is essential due to their toxicity to aquatic ecosystems and human health. There is an urgent need to expand spatial surveillance of emerging toxic pollutants and the application of advanced source-tracking approaches, such as chemical fingerprinting, isotopic tracing and watershed-scale modelling.</p>","PeriodicalId":8104,"journal":{"name":"Aquaculture Research","volume":"2026 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/are/8502242","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148943553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Xylanase, Phytase, and Protease on Growth Performance, Nutrient Digestibility, and Digestive Gene Expression of Pacific White Shrimp (Litopenaeus vannamei)","authors":"Jairo A. Gonzalez,&nbsp;Cristhian F. San Andres,&nbsp;Khanh Nguyen,&nbsp;Arnold J. Gutierrez,&nbsp;Magida Tabbara,&nbsp;Melanie A. Rhodes,&nbsp;Timothy J. Bruce,&nbsp;D. Allen Davis","doi":"10.1155/are/5768659","DOIUrl":"https://doi.org/10.1155/are/5768659","url":null,"abstract":"<p>Plant-based ingredients are a cost-effective replacement for animal protein sources in shrimp feeds. However, the presence of antinutritional factors (ANF) like nonstarch polysaccharides (NSP) and phytate limittheir inclusion. NSP are known to increase gut viscosity, decreasing the diffusion rate of substrates and preventing endogenous enzymes from breaking down feed molecules. Dietary exogenous enzymes like xylanase (XYL) and phytase (PHY) enhance the degradation of ANF into more readily available compounds. Therefore, this study aims to evaluate the effect and interactions of XYL, PHY, and a protease complex (PCO), individually or in combination, on growth performance, nutrient utilization, nutrient digestibility, and gene expression of Pacific white shrimp (<i>Litopenaeus vannamei</i>) over 8 weeks. Juvenile shrimp (0.23 ± 0.01 g initial weight) were reared in a recirculating aquaculture system (RAS) using green brackish water and fed one of eight diets (35% protein, 8% lipid) supplemented with enzymes individually or in combination. Neither individual enzyme supplementation nor their combinations affected growth performance parameters, whole-body proximate composition, protein and phosphorus retention, or gene expression of <i>trypsin</i>, <i>alp</i>, <i>amylas</i>e, and <i>fasn</i> (<i>p</i> &gt; 0.05). However, differences in digestibility of dry matter, energy, and crude protein were observed (<i>p</i> &lt; 0.05). These results suggest that exogenous enzyme supplementation offers limited benefit to Pacific white shrimp reared in green-water systems, possibly due to supplemental nutrition provided by the green-water environment.</p>","PeriodicalId":8104,"journal":{"name":"Aquaculture Research","volume":"2026 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/are/5768659","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148943179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"RETRACTION: Probiotic Effects of the Fungi, Aspergillus niger on Growth, Immunity, Haematology, Intestine Fungal Load and Digestive Enzymes of the Common Carp, Cyprinus carpio","authors":"Aquaculture Research","doi":"10.1155/are/9846571","DOIUrl":"https://doi.org/10.1155/are/9846571","url":null,"abstract":"<p>RETRACTION: S. A. Jasim, W. K. Abdelbasset, R. A. Shichiyakh, et al., “Probiotic Effects of the Fungi, <i>Aspergillus niger</i> on Growth, Immunity, Haematology, Intestine Fungal Load and Digestive Enzymes of the Common Carp, <i>Cyprinus carpio</i>,” <i>Aquaculture Research</i> 53, no. 1 (2022): 3828–3840, https://doi.org/10.1111/are.15890.</p><p>The above article, published online on 10 May 2022 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the Journal Editor, Christyn Bailey and John Wiley &amp; Sons Ltd.</p><p>The retraction has been agreed upon following an investigation into concerns raised by a third party over the authorship of the article. The authors were asked to respond to the issues concerning the article’s authorship, but following multiple requests, they failed to respond. As a result, we no longer have confidence in the integrity of the article’s content, and we cannot vouch for its reliability.</p><p>The authors were informed of the retraction, but did not respond.</p>","PeriodicalId":8104,"journal":{"name":"Aquaculture Research","volume":"2026 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/are/9846571","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148942855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Identification of Potential Health and Welfare-Relevant Biomarkers for Chronic Hypoxia in Rainbow Trout (Oncorhynchus mykiss)","authors":"Elias Lahnsteiner,&nbsp;Franz Lahnsteiner,&nbsp;Buumba Mudenda Hampuwo,&nbsp;Anna Dünser","doi":"10.1155/are/8689430","DOIUrl":"https://doi.org/10.1155/are/8689430","url":null,"abstract":"<p>Chronic exposure to suboptimal dissolved oxygen (DO) is a common challenge in aquaculture and poses a significant risk to fish health and welfare. This study characterized performance- and welfare-related markers in <i>Oncorhynchus mykiss</i> subjected to long-term hypoxia. Juveniles with a body mass of 8.52 ± 1.02 g were exposed for 15 and 30 days to 4.0 mg L⁻¹ O₂, while controls were maintained at 9.80 mg L⁻¹ O₂. The study evaluated survival rate, growth rate, condition factor (CF), behavior, morphometric traits, hematological and biochemical blood parameters, hepatic energy stores, metabolic rate (oxygen consumption and <i>atp5j</i> expression), inflammation (<i>il6</i>), homeostasis (<i>cyp450a</i>), oxidative defense (<i>gr</i>), and genes associated with welfare (5-hydroxytryptamine receptor 1A [<i>5ht1a</i>], gamma aminobutyric acid receptor–associated protein [<i>gabarap</i>], and brain-derived neurotrophic factor [<i>bdnf</i>]). Hypoxic exposure induced statistically significant responses. Persistent negative effects determined after 15 and 30 days exposure included reduced growth, CF, and hepatosomatic index (HSI); altered hematological parameters (including increased erythrocyte surface-to-volume ratio); elevated serum aspartate aminotransferase (AST); and reduced lipase activity, indicating impaired tissue integrity. Increased <i>il6</i> expression after 15 days further reflected inflammatory stress. A sustained adaptive response was a metabolic shift toward anaerobic glycolysis, shown by elevated serum lactate and lactate dehydrogenase (LDH) activity. After 30 days, additional adaptations included reduced metabolic rate, increased erythrocyte, granulocyte, and lymphocyte concentrations; elevated hemoglobin levels; and enhanced oxidative defense (upregulated glutathione reductase (<i>gr</i>) expression). In the liver, the genes <i>5-ht1a</i> (upregulated at 15 days) and <i>gabarap</i> (downregulated at 30 days) suggested stress-related effects. Behavior and major morphometric traits were unchanged. However, in the brain, <i>5-ht1a</i> and <i>gabarap</i> were strongly upregulated after 30 days of hypoxia exposure, interpreted as a first potential indication for a negative effect on animal welfare. The combined analysis of these endpoints demonstrates that physiological and welfare impairment may occur well before lethal thresholds or clear behavioral abnormalities become apparent.</p>","PeriodicalId":8104,"journal":{"name":"Aquaculture Research","volume":"2026 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/are/8689430","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148942581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}