Aquaculture Reports最新文献

{"title":"Effects of dietary sorghum inclusion on growth performance, liver function, antioxidant capacity and flesh quality in grass carp (Ctenopharyngodon idella)","authors":"Xuehan Wang ,&nbsp;Xiangqin Lin ,&nbsp;Huajing Huang ,&nbsp;Wen Jiang ,&nbsp;Haifeng Mi ,&nbsp;Lu Zhang ,&nbsp;Junming Deng","doi":"10.1016/j.aqrep.2025.102886","DOIUrl":"10.1016/j.aqrep.2025.102886","url":null,"abstract":"<div><div>In recent years, the issue of food security has gained significant importance. The development and use of non-grain feed ingredients, such as sorghum, plays a vital role in reducing competition for food between humans and animals while conserving food resources. This study aimed to investigate the effects of dietary sorghum inclusion on the growth performance, liver function, antioxidant capacity and fillet quality of grass carp (<em>Ctenopharyngodon idella</em>). Six isonitrogenous and isolipidic experimental diets were formulated, incorporating wheat flour/rice bran and sorghum as carbohydrate sources, with varying levels of sorghum (0 %, 4 %, 8 %, 12 %, 16 %, and 20 %). Each diet was administered to three separate cages, each containing 35 fish (7.10 ± 0.01 g) for 10 weeks. The results indicated that dietary sorghum inclusion did not significantly affect the growth performance and body index of grass carp. Furthermore, the activities of liver function-related enzymes (aspartate aminotransferase, alanine aminotransferase) in grass carp remained unchanged with dietary sorghum inclusion. However, dietary inclusion of 16 % sorghum enhanced the activities of antioxidant-related enzymes (superoxide dismutase, glutathione peroxidase) and glycolysis-related enzymes (phosphofructokinase) in grass carp, as well as the expression level of <em>pk</em>. Notably, this inclusion level also improved the flesh quality by enhancing the nutritional value and textural properties of fish fillet. Overall, the appropriate dietary inclusion of sorghum is feasible for grass carp, with the levels of up to 20 % not compromising growth and health, while the optimal effects, including enhanced antioxidant capacity and improved flesh quality, were observed at 16 % inclusion level.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"43 ","pages":"Article 102886"},"PeriodicalIF":3.2,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144106240","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}

{"title":"The fate of carbon, nitrogen and phosphorus in freshwater polyculture mesocosms using both nutrient-balance and stable-isotope assessment","authors":"Sarah Nahon ,&nbsp;Christophe Jaeger ,&nbsp;Christophe Menniti ,&nbsp;Philippe Kerherve ,&nbsp;Marc Roucaute ,&nbsp;Joel Aubin","doi":"10.1016/j.aqrep.2025.102865","DOIUrl":"10.1016/j.aqrep.2025.102865","url":null,"abstract":"<div><div>Freshwater polyculture can increase nutrient use by rearing species from different trophic levels. The aim of this study was to quantify nutrient balances and determine the food sources of fish using nitrogen (N) and phosphorus (P) nutrient balances and carbon (δ¹³C) and N (δ¹⁵N) stable isotopes. The contributions of food sources to fish diets were estimated using stable-isotope mixing models. Three treatments were compared in mesocosms: fish-only (F treatment: common carp, roach and largemouth bass), fish-macrophyte (FM treatment) and macrophyte-only (M treatment). Fish were fed with commercial pellets. The results showed that adding macrophytes to the fish did not improve water quality. Chlorophyll-<em>a</em> concentration in F and FM treatments was significantly higher than that in treatment M (8.1, 8.3 and 0.6 µg l⁻¹, respectively). Regardless of the treatment, sediment contained most of the total N and P at harvest (93.5 and 89.7 %, respectively). Carp, roach and bass had a similar specific growth rate in F and FM treatments (1.19, 0.36, 0.94 % day⁻¹, respectively). Carp consumed 90 % commercial feed and 8 % macrobenthic invertebrates, while roach consumed 50 % commercial feed and supplemented their diet with macrophytes (15 %), macrobenthic invertebrates (12 %) and large zooplankton (11 %). Juvenile roach and bass had higher δ¹⁵N values than carp and roach did (12.31, 14.55, 7.54, 10.44 ‰, respectively). Bass consumed mainly juvenile roach (59 %), followed by macrobenthic invertebrates (25 %). Combining the nutrient balances and stable isotopes showed that sediment was the main nutrient pool, but that organisms in the mesocosms consumed little sediment organic matter.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"43 ","pages":"Article 102865"},"PeriodicalIF":3.2,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144106239","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}

{"title":"Fish farming for diversifying cocoa production in Côte d’Ivoire: Typology of practices","authors":"Antoine K. Kouadio ,&nbsp;Elodie Pepey ,&nbsp;Lucas Fertin ,&nbsp;Henri-Joel K. Niamien ,&nbsp;Seri Brou ,&nbsp;Charles K. Boussou ,&nbsp;Simon Pouil","doi":"10.1016/j.aqrep.2025.102866","DOIUrl":"10.1016/j.aqrep.2025.102866","url":null,"abstract":"<div><div>Fish farming in Côte d’Ivoire has been promoted as a diversification strategy for cocoa producers, yet the sector exhibits significant heterogeneity in farming practices, which remains poorly documented. This study aimed to classify fish farming systems and identify key determinants of their performance. Surveys were conducted with 45 farmers across three cocoa-producing regions - Bédiala, Méagui, and Sinfra - and data were analyzed using Factor Analysis of Mixed Data (FAMD) and clustering analysis, leading to the identification of three distinct farm types. Type 1 farms, found in Bédiala, have the largest production areas (median: 2.9 ha) and predominantly practice polyculture of Nile tilapia (<em>Oreochromis niloticus</em>), bony tongue (<em>Heterotis niloticus</em>), and catfish (<em>Clarias</em> spp.), often integrated with rice farming. Type 2 farms, found in Sinfra, employ the most intensive practices, characterized by the use of monosex tilapia fingerlings and reproductive control via banded jewelfish (<em>Hemichromis fasciatus</em>), resulting in the highest yields (median: 1033 kg ha⁻¹ yr⁻¹). Type 3 farms, found in Méagui and Sinfra, are the least productive (median: 450 kg ha⁻¹ yr⁻¹), constrained by longer production cycles and limited technological adoption. These findings reveal significant regional disparities in fish farming practices and productivity, underscoring the need for tailored policy interventions. Strategies should focus on promoting improved production techniques in low-yielding systems while supporting sustainable intensification in more advanced farms to enhance the sector’s contribution to rural livelihoods and food security.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"43 ","pages":"Article 102866"},"PeriodicalIF":3.2,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144106237","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}

{"title":"Transcriptomics reveals creatine regulation of ovarian development at low temperature in Chinese soft-shelled turtles (Pelodiscus sinensis)","authors":"Guoyin Zhang ,&nbsp;Xi He ,&nbsp;Yulong Li ,&nbsp;Jiazhen Wu ,&nbsp;Guoying Qian ,&nbsp;Zhongfa Chen ,&nbsp;Caiyan Li ,&nbsp;Wei Wang","doi":"10.1016/j.aqrep.2025.102867","DOIUrl":"10.1016/j.aqrep.2025.102867","url":null,"abstract":"<div><div>Some economically important animals hibernate; however, their energy regulation during low-temperature fasting remain poorly understood. To investigate ovarian development in Chinese soft-shelled turtles (<em>Pelodiscus sinensis</em>) under low-temperature conditions, premature turtles were treated with creatine at concentrations of 50–400 mg/kg body weight. Ovarian follicle development, creatine kinase (CK) expression, and liver transcriptomics were analyzed. After 8 weeks of creatine treatment, ovarian follicle diameters and yolk granule accumulation increased significantly (<em>P</em> &lt; 0.05), CK expression was significantly upregulated (<em>P</em> &lt; 0.05), and ovarian lactic acid levels decreased significantly (<em>P</em> &lt; 0.05). Transcriptome analysis identified 4355 differentially expressed genes in the liver. Creatine treatment significantly increased the expression of <em>VTG</em>, <em>LEPR</em>, <em>LHR</em>, <em>FSHR</em>, and <em>CK-B</em> genes, and genes in the adipocytokine signaling, oxidative phosphorylation, gonadotropin-releasing hormone (GnRH) signaling, and peroxisome proliferator–activated receptor signaling pathways were significantly upregulated. Creatine administration also enhanced leptin secretion from adipocytes, promoting ovarian development via the GnRH signaling pathway. This study provides a foundation for understanding energy metabolism in <em>P. sinensis</em>, offering insights to improve energy management and reproductive potential in hibernating animals under low-temperature conditions.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"43 ","pages":"Article 102867"},"PeriodicalIF":3.2,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144090122","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}

{"title":"Optimization strategy for all-male Nile tilapia (Oreochromis niloticus) production using hormonal complex-microencapsulated feed under different rearing conditions","authors":"Natthapong Paankhao ,&nbsp;Noratat Prachom ,&nbsp;Chak Aranyakanont ,&nbsp;Wirawan Nuchchanart ,&nbsp;Attawit Kovitvadhi ,&nbsp;Chayanit Soontara ,&nbsp;Suwinai Paankhao ,&nbsp;Kittipong Promsee ,&nbsp;Sahat Ratmuangkhwang ,&nbsp;Chanoknan Sintuprom ,&nbsp;Mongkhon Jaroenkittaweewong ,&nbsp;Akkarasiri Sangsawang","doi":"10.1016/j.aqrep.2025.102874","DOIUrl":"10.1016/j.aqrep.2025.102874","url":null,"abstract":"<div><div>Optimization strategies were investigated for the production of all-male tilapia (<em>Oreochromis niloticus</em>) fry using a hormone-microencapsulated prototype under different rearing conditions. The factorial design experiment (2 × 2 × 4) used a completely randomized design (CRD) with three factors: two experimental diets (fish meal mixed with rice bran and a complex microcapsule formula); the period of feeding containing the hormone 17α-methyltestosterone (MT) using two periods (14 and 21 days); and the MT hormone concentration at four levels in the mixed diet (0, 10, 30, or 60 mg/kg feed). The experiment had three replicates, with tilapia reared in tanks or reared in hapas nets for a period of 28 days. The results showed that all three factors combined influenced the survival rate of fish fry. The fry fed with both formulas mixed with hormones at concentrations of 10, 30, and 60 mg/kg for 14 and 21 days consisted of more than 95 % males and had the highest mean ± standard deviation survival rate (93.8 ± 5.02 %). The hormone treatment period did not affect the proportion of sex reversion in Nile tilapia fry, while the MT concentration level did affect the sex reversion in Nile tilapia fry to male. The fry reared on the complex-microcapsules feed had better growth than the fry fed the control formula in both tanks and hapas nets. The hormone dose and treatment period significantly affected the relative expression of the <em>cyp19a1a</em> or <em>dmrt1</em> genes of the fry reared in fiber tanks for 28 days (<em>P</em> &lt; 0.05). Therefore, a feed formula for rearing tilapia larvae at the weaning stage based on the prototype complex hormone-microcapsule feed could be used in place of fish meal to improve the production efficiency of all-male tilapia and reduce the amounts of hormones used in the feed.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"43 ","pages":"Article 102874"},"PeriodicalIF":3.2,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144090038","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}

{"title":"Effects of Periplaneta americana powder instead of fishmeal on growth performance, antioxidant capacity and intestinal microbiota in Southern catfish (Silurus meridionalis)","authors":"You-Xing Xu ,&nbsp;Xiao-Yan Wang ,&nbsp;Huan-Chong Gu ,&nbsp;Jing-Bao Yang ,&nbsp;Jing Diao ,&nbsp;Ze-Sheng Zhang ,&nbsp;Meng-Meng Huang ,&nbsp;Hui Fei ,&nbsp;Shun Yang","doi":"10.1016/j.aqrep.2025.102895","DOIUrl":"10.1016/j.aqrep.2025.102895","url":null,"abstract":"<div><div>American cockroach (<em>Periplaneta americana</em>) is rich in high protein and various active ingredients, and its powder is a high-quality source of protein. In present study, four isonitrogenous and isolipidic diets replacing 0 %, 10 %, 20 %, and 30 % fish meal with <em>P. americana</em> powder (PAP) were formulated for a 56-day feeding trial with southern catfish (<em>Silurus meridionalis</em>). Our findings revealed that 10 % PAP substitution significantly enhanced growth performance (WGR: 404.07 ± 22.02, <em>p</em> &lt; 0.05), improved feed efficiency (FCR: 1.02 ± 0.003, <em>p</em> &lt; 0.05), boosted antioxidant capacity (elevated SOD activity and reduced MDA levels, <em>p</em> &lt; 0.05), and reduced liver injuries. However, higher substitution ratios impaired growth, antioxidant capacity, and caused tissue injuries in liver and intestine. 16S rDNA sequencing revealed that 10 % PAP increased intestinal abundance of anaerobic bacteria (Bacteroidaceae, Barnesiellaceae, Fusobacteriaceae, and Peptostreptococcaceae), which may be associated with adaptive responses to PAP utilization. These findings indicate that 10 % PAP optimally replaces fish meal in southern catfish diets, with anaerobic fermentation potentially playing a key role in PAP utilization.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"43 ","pages":"Article 102895"},"PeriodicalIF":3.2,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144090123","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}

{"title":"Effects of exogenous protease supplementation on growth performance, liver health, immunity and intestinal microbiota of grass carp (Ctenopharyngodon idella)","authors":"Tingyao Zhu ,&nbsp;Lihui Sun ,&nbsp;Qian Li ,&nbsp;Jianhu Jiang ,&nbsp;Haiqi Zhang ,&nbsp;Zhangying Ye ,&nbsp;Jianming Chen ,&nbsp;Jianlin Guo","doi":"10.1016/j.aqrep.2025.102878","DOIUrl":"10.1016/j.aqrep.2025.102878","url":null,"abstract":"<div><div>This study aims to investigate the effects of dietary supplementation with protease on the growth performance, liver health, immunity, and intestinal microbiota of grass carp. Three levels of protease, 0 U/kg (P0), 6000 U/kg (P6000) and 12,000 U/kg (P12000), were formulated into diets using post-spray technology. After 9 weeks of feeding, the P6000 group had a higher weight gain rate than the P0 group, with both P6000 and P12000 groups exhibiting higher protein retention ratio and lower feed conversion ratio compared to P0. As protease levels increased, crude protein content and intestinal protease activity increased, while alkaline phosphatase (ALP) content decreased. Concurrently, the P6000 group showed higher aspartate transaminase (AST) and triglyceride (TG) levels but lower amylase content compared to P0. In terms of immune indicators, the expression levels of <em>Intelectin</em> and <em>MHC-II β</em> in the P6000 and P12000 groups were significantly lower than in P0, and <em>IgM</em> expression gradually increased with increasing protease levels. After challenge with <em>Aeromonas veronii</em>, the P12000 group showed higher survival rate. The histological results indicated that the intestinal villi length in the P6000 group was notably longer than in other groups. The intestinal microbiota analysis revealed that with increasing protease levels, Fusobacteriota abundance decreased and Actinobacteriota and Cyanobacteria abundance increased at the phylum level, while <em>Aeromonas</em> relative abundance decreased at the genus level. Overall, 6000 U/kg protease boosts grass carp growth and nutrient retention maximally, while 12,000 U/kg protease increases survival but may increase liver metabolic burden. Given these outcomes, the optimal protease inclusion level for grass carp aquaculture is approximately 6000 U/kg.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"43 ","pages":"Article 102878"},"PeriodicalIF":3.2,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144106235","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}

{"title":"Effects of Astragalus membranaceus by-product on pellet quality, mold growth and resistance of Crucian carp (Carassius auratus) against Aeromonas hydrophila","authors":"Gangfu Chen ,&nbsp;Jing Xu ,&nbsp;Junhao Huang ,&nbsp;Huatao Li ,&nbsp;Xiaolu Yu ,&nbsp;Jie Li ,&nbsp;Huilan Zhang ,&nbsp;Ting Zhang ,&nbsp;Jianying Pu ,&nbsp;Limei Luo ,&nbsp;Yuxue Ye ,&nbsp;Ling Liao ,&nbsp;Linhui He ,&nbsp;Xin Wei ,&nbsp;Qihui Yang ,&nbsp;Jun Jiang","doi":"10.1016/j.aqrep.2025.102820","DOIUrl":"10.1016/j.aqrep.2025.102820","url":null,"abstract":"<div><div>This study investigated the effects of <em>Astragalus membranaceus</em> by-product (AP) on feed quality, mold growth, and fish disease-resistant ability. Seven fish diets were prepared with gradient levels of AP (0, 1.0, 2.0, 4.0, 8.0, 16 and 32 %). A total of 420 juvenile Crucian carp (7.17 ± 0.05 g) were randomly assigned and fed for 60 days. Results showed that AP supplementation decreased pellet hardness, and increased pellet durability index, as well as inhibited mold growth of pelleted fish feed (<em>P&lt;</em>0.05). Fish weight gain (WG), feed efficiency (FE), content of reduced glutathione, and the activity of anti-hydroxy radical and anti-superoxide anion, as well as enzymes such as trypsin, amylase, alkaline phosphatase, Na⁺/K⁺-ATPase^, superoxide dismutase, glutathione reductase, lipase, and glutathione-S-transferase in fish digestive organs were all improved (<em>P&lt;</em>0.05), while malonaldehyde levels were decreased by dietary AP supplementation (<em>P&lt;</em>0.05). The optimal AP supplementation levels for Crucian carp were 1.02 % and 1.03 %, as determined by broken-line regression analysis of WG and FE. Furthermore, dietary AP supplementation decreased the mortality of crucian carp after challenge with <em>A. hydrophilia</em> and increased lysozyme activity, and levels of total amino acids and protein in the plasma, and decreased content of ammonia, and activities of glutamate-oxaloacetate transaminase and glutamate-pyruvate transaminase in the plasma (<em>P&lt;</em>0.05). Our study suggested that AP supplementation improves feed quality and inhibites mold growth. The beneficial of AP on fish growth performance may be associated with improved absorption and digestion. Dietary inclusion of AP enhanced non-specific immunity and antioxidant status so as to improve fish disease-resistant ability.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"43 ","pages":"Article 102820"},"PeriodicalIF":3.2,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084678","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}

{"title":"Oxygen nanobubble-induced hyperoxia: Effects on growth, digestive enzyme activity, intestinal morphology, and biochemical parameters in kuruma prawn (Penaeus japonicus)","authors":"Jiadong Guo ,&nbsp;Yi Chen ,&nbsp;Yuntian Zhang ,&nbsp;Rongwei Zhang ,&nbsp;Kotoya Inaba ,&nbsp;Tatsu Osato ,&nbsp;Xiaoran Zhao ,&nbsp;Yuzhe Han ,&nbsp;Tongjun Ren","doi":"10.1016/j.aqrep.2025.102882","DOIUrl":"10.1016/j.aqrep.2025.102882","url":null,"abstract":"<div><div>Oxygen nanobubble (NB-O₂) technology constitutes an efficient and stable approach for the release of dissolved oxygen (DO), frequently leading to a substantial elevation in DO levels within the water. Nevertheless, the potential effects of long-term hyperoxia induced by NB-O₂ exposure in farmed shrimp remain poorly understood. Accordingly, this research aims to investigate the impact of hyperoxia during NB-O₂ treatment on growth performance, digestive enzyme activity, intestinal morphology, muscle proximate composition, and target gene expression in kuruma prawn (<em>Penaeus japonicus</em>). The present study employed NB-O₂ as a technical strategy to regulate dissolved oxygen levels and conducted a 40-day aquaculture experiment under DO conditions of 7.45 ± 0.16 mg/L (air treatment) and 15.95 ± 0.11 mg/L (NB-O₂ treatment). The study demonstrated that hyperoxia during NB-O₂ treatment enhances the growth performance of <em>P. japonicus</em> (weight gain rate, specific growth rate, and molting rate), improves intestinal digestive enzyme activity (pepsin, trypsin), and augments muscle proximate components (crude protein, crude fat). Furthermore, the NB-O₂ treatment increased serum biochemical parameters (glucose, total protein, albumin, acid phosphatase, alkaline phosphatase, and lysozyme) and upregulated the expression of digestion and antioxidant genes (<em>trypsin 1</em>, <em>peroxidase</em>), and it significantly reduced the number of pathogenic microorganisms in seawater, demonstrating its effectiveness in water quality purification. In conclusion, long-term hyperoxia induced by NB-O₂ exposure offer potential benefits for the aquaculture of <em>P. japonicus</em>, promoting overall health and stability.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"43 ","pages":"Article 102882"},"PeriodicalIF":3.2,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084609","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}

{"title":"How to mitigate high risks to secure more high-quality protein? Joint technological innovation strategies for offshore mariculture considering different power structures","authors":"Xin Qi ,&nbsp;Fengxuan Zhang ,&nbsp;Ying Zhang ,&nbsp;Mingxing Zheng ,&nbsp;Yichong Dong","doi":"10.1016/j.aqrep.2025.102869","DOIUrl":"10.1016/j.aqrep.2025.102869","url":null,"abstract":"<div><div>Offshore Mariculture (OM) represents a novel approach to alleviating inshore environmental pressure while meeting the growing demand for high-quality protein. The potential for unforeseeable risk losses during the operational process has seriously hindered the development of this industry. To better address the developmental challenges of offshore mariculture, this study incorporates various power structures and the role of information sharing. Focusing primarily on mitigating risk losses, it constructs a differential game model involving research institutions and offshore mariculture enterprises (OME) under four decision-making modes: centralized decision-making, decentralized decision-making without cost-sharing, research institution–driven decentralized decision-making, and enterprise-driven decentralized decision-making. The model is then analyzed through numerical simulations. The results of the study reveal the following: (1) It is generally difficult for OME and research institutions to form a central decision-maker capable of achieving the optimal outcomes of centralized decision-making. However, the revenue of the mariculture decision-making system, the level of information sharing, and the reduction in risk losses under the centralized mode can serve as optimal benchmarks. Compared with non-cooperative decentralized decision-making, decision-making modes driven by either party are wiser choices. (2) The dominant party between OME and research institutions varies across different development stages. As the cost of mariculture-related efforts declines, all key indicators of the decision-making system improve significantly in the mature stage compared to earlier phases. At this stage, OME tend to take the lead, yet maintaining the R&amp;D motivation of research institutions remains practically relevant. (3) In the mature phase of OM development, governments can achieve more desirable outcomes with relatively lower R&amp;D funding. Therefore, while adhering to the original intention of fostering early-stage development, government support can become more flexible during the mature stage.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"43 ","pages":"Article 102869"},"PeriodicalIF":3.2,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084610","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}