Aquaculture Reports最新文献

{"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}

{"title":"Effects of different dietary zinc sources on growth performance, muscle texture, and intestinal immunity in Mandarin Fish (Siniperca chuatsi)","authors":"Xiaolu Yan ,&nbsp;Lingcheng Pan ,&nbsp;Zhigang Deng ,&nbsp;Yabin Wu ,&nbsp;Dianchao Gu ,&nbsp;Lei Yan ,&nbsp;Yushuang Chen ,&nbsp;Da Zhou ,&nbsp;Fubao Wang ,&nbsp;Min Zhao ,&nbsp;Li Luo","doi":"10.1016/j.aqrep.2025.102877","DOIUrl":"10.1016/j.aqrep.2025.102877","url":null,"abstract":"<div><div>The study aims to examine the effects of different dietary zinc sources on growth performance, muscle texture, and intestinal immunity in Mandarin Fish (<em>Siniperca chuatsi</em>), a basic diet (control group) and five experimental diets with additional 40 mg/kg of Zn designed in this experiment. Five Zn sources are ZnSO₄, Zn-RAA (rice protein amino acid chelate zinc), Zn-SAA (soy protein amino acid chelate zinc), Zn-Met (1:1), and Zn-Met (2:1), respectively. A total of 270 <em>S. chuatsi</em> (initial weight 67.46 ± 2.02 g) were divided into six groups, each with three replicates of 15 fish, for a 49-day growth trial. Results showed that all zinc sources increased growth and feed conversion. Zn-Met (2:1) had the best effect, followed by Zn-Met (1:1), Zn-RAA, Zn-SAA, and ZnSO₄ had the least effect. The Zn-Met (2:1) group significantly enhanced muscle texture, optimized myofiber structure, and increased Zn deposition and collagen content in muscle. It also elevated intestinal Cu/Zn-SOD, T-SOD, and T-AOC activities, reduced MDA levels, and upregulated the mRNA expression of antioxidant genes like <em>cu/zn-sod, nrf2</em>, <em>gpx1</em>, and <em>cat</em>. This group improved intestinal digestive and absorptive enzymes activities, reduced intestinal damage and inflammation, decreased Endotoxin and D-LA levels, and increased IgM content. Proinflammatory cytokines (<em>il-8, il-1β, tnf-α</em>) were downregulated, while the anti-inflammatory gene <em>tgf-β1a</em> was upregulated. 16S rRNA sequencing showed an increase in the relative abundance of beneficial bacteria and α-diversity. Overall, amino acid-chelated zinc outperforms zinc sulfate in promoting growth, improving muscle quality, antioxidant and immune functions, and enhancing intestinal health, with Zn-Met (2:1) having the best effects.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"43 ","pages":"Article 102877"},"PeriodicalIF":3.2,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071905","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 different natural bivalve diets on the growth performance and nutritional composition of juvenile Neptunea arthritica cumingii","authors":"Yongxin Sun ,&nbsp;Shanshan Zhang ,&nbsp;Liang Qu ,&nbsp;Hualin Li ,&nbsp;Weiming Teng ,&nbsp;Dacheng Li ,&nbsp;Chong Zhao ,&nbsp;Qingzhi Wang","doi":"10.1016/j.aqrep.2025.102873","DOIUrl":"10.1016/j.aqrep.2025.102873","url":null,"abstract":"<div><div>A four-week feeding trial was conducted to identify suitable natural bivalve diets for the growth of juvenile <em>Neptunea arthritica cumingii</em>. The trial aimed to evaluate the effects of various bivalve species on the growth performance and nutritional composition of the juvenile snails. The snails used in the trial had an average weight of 0.48 ± 0.05 g. The tested bivalve species included <em>Sinonovacula constricta</em>, <em>Mactra membranacea</em>, <em>Crassostrea gigas</em>, <em>Mizuhopecten yessoensis</em>, <em>Ruditapes philippinarum</em>, and <em>Hyriopsis cumingii</em>. The results indicated that, except for the <em>C. gigas</em> group, all other groups achieved a survival rate of 100 %. The juvenile snails fed with <em>S. constricta</em> exhibited the highest final body weight and specific growth rate, significantly surpassing those in the <em>C. gigas</em>, <em>M. yessoensis</em>, and <em>H. cumingii</em> groups (<em>P</em> &lt; 0.05), with the lowest feed conversion ratio observed in the <em>S. constricta</em> group. In terms of digestive enzyme activity, the <em>R. philippinarum</em> group showed significantly higher gastric protease and amylase activities compared to the other groups (<em>P</em> &lt; 0.05), while the <em>H. cumingii</em> group had the highest lipase activity among all groups. Correlation analysis revealed that the soft tissue of juvenile <em>N. arthritica cumingii</em> fed with <em>M. yessoensis</em> exhibited a very strong correlation with seven amino acids present in the scallops. Similarly, the soft tissue of juvenile whelks fed with <em>S. constricta</em> showed a very strong correlation with seven polyunsaturated fatty acids found in the clams. Among the six natural diets tested, measures of <em>S. constricta</em> is recommended as a superior natural bivalve diet for juvenile <em>N. arthritica cumingii</em>, based upon feed utilization, growth performance, and nutritional enhancement.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"43 ","pages":"Article 102873"},"PeriodicalIF":3.2,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144069415","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 dietary sharp-leaf galangal (Alpinia oxyphylla) fruit extract on growth, muscle composition, immune responses, gut flora, and disease resistance in juvenile red claw crayfish (Cherax quadricarinatus)","authors":"Chi Xu ,&nbsp;Yao-Peng Lu ,&nbsp;Ze-Long Zhang ,&nbsp;Chen-Guang Hao ,&nbsp;Zi-Hang Yu ,&nbsp;Jun-Tao Li ,&nbsp;Pei-Hua Zheng ,&nbsp;Xiu-Xia Zhang ,&nbsp;Xiu-Ying Yang ,&nbsp;Hui Guo ,&nbsp;Jian-An Xian","doi":"10.1016/j.aqrep.2025.102870","DOIUrl":"10.1016/j.aqrep.2025.102870","url":null,"abstract":"<div><div>Sharp-leaf galangal (<em>Alpinia oxyphylla</em>) is one of the four major southern medicinal herbs in China and exhibits various bioactive characteristics, such as anti-inflammatory properties, immunomodulatory effects, and antioxidant activity. In this study, we assessed the effects of <em>A. oxyphylla</em> fruit extract (AOE) on the overall performances of red claw crayfish (<em>Cherax quadricarinatus</em>). Crayfish (0.81 ± 0.02 g) were treated with diets at various AOE levels (0 (CG), 0.5 (AOE1), 1 (AOE2), 3 (AOE3), 5 (AOE4), and 7 (AOE5) g/kg) for 56 days. The groups supplemented with 1–3 g/kg AOE exhibited significantly higher specific growth rates and weight gain rates compared to the control group. Lipase and trypsin activities in the AOE2 and AOE3 groups were significantly increased compared to the CG group. Dietary AOE could increase SOD, T-AOC, GPx, PO, AKP, and ACP activities and decrease MDA content of crayfish. Dietary AOE significantly induced the expression of ecCu, Zn-SOD, SOD, Trx1, ALF, C-LZM, GPx and Se-GPx mRNA of crayfish. Gut microbiota analysis revealed that the dominant bacterial groups in crayfish were Proteobacteria, Firmicutes, and Bacteroidetes. At the genus level, the most prevalent taxa were <em>Hypnocyclicus</em>, <em>Cloacibacterium</em>, and <em>Aeromonas</em>. The survival rates of crayfish under <em>A. hydrophila</em> infection in the AOE2 and AOE3 groups were significantly higher than those in the CG group. The optimum level of dietary supplementation was 1–3 g/kg AOE in juvenile <em>C. quadricarinatus</em>.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"43 ","pages":"Article 102870"},"PeriodicalIF":3.2,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071902","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":"Effect of phytoplankton and zooplankton feeding on fatty acid dynamics in the early development of the mangrove red crab Ucides occidentalis","authors":"Juletzy Reyes ,&nbsp;Daniel Rodríguez-Pesantes ,&nbsp;Stanislaus Sonnenholzner ,&nbsp;Julia Nieto-Wigby","doi":"10.1016/j.aqrep.2025.102872","DOIUrl":"10.1016/j.aqrep.2025.102872","url":null,"abstract":"<div><div>The nutritional quality, biochemical nature, and fatty acid (FA) composition of live feed play a crucial role in influencing the larval performance of crabs. This study examines the impact of FA content in three brown microalgae (<em>Chaetoceros gracilis</em>, <em>Chaetoceros muelleri</em>, and <em>Pavlova lutheri</em>) as well as two zooplanktonic organisms (<em>Brachionus plicatilis</em> and <em>Artemia franciscana</em>) on the FA composition and dynamics, metamorphosis rate, and survival of mangrove red crab <em>Ucides occidentalis</em> larvae. Spawning was induced during the lunar peak phase. Zoea I larvae were distributed into five 1000-L tanks and stocked at a density of 0.05 larvae.mL⁻¹. Culture was performed at a salinity of 28.0 g.kg⁻¹ and 30.0 ± 0.5°C. The larval culture lasted 18 days with a 3-day interval for each molt, a growth rate of 6.4 ± 0.04 %·day⁻¹ (per triplicate, n = 30), and a final survival of 9.5 ± 2.5 %. Notably, Zoea larvae exhibited the highest amount of omega-9 throughout the larval stages (between 26 and 40 %, particularly oleic acid). Furthermore, zooplanktonic feed demonstrated a significant impact on the FA profile of larvae, encouraging the emergence of eicosapentaenoic acid (between 5.23 and 10.14 %), docosahexaenoic acid (between 1.70 and 3.88 %), and arachidonic acid (between 0.79 and 4.26 %) from zoea II onwards. We determined the importance of omega-9, palmitic, stearic, palmitoleic and long-chain polyunsaturated fatty acids (particularly EPA), so we suggest their inclusion and thus meet specific dietary needs. These findings shed light on the dynamics of AF during larval development of <em>U. occidentalis</em>, suggesting the potential to develop more efficient combinations of live feed to meet its nutritional requirements, thereby optimizing seed production for ecological restoration or aquaculture.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"43 ","pages":"Article 102872"},"PeriodicalIF":3.2,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071901","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 Haematococcus pluvialis powder in the diet of golden pompano (Trachinotus ovatus) on the growth performance, pigmentation, hepatic and intestinal health, antioxidant capacity and immunity","authors":"Jieping Liu ,&nbsp;Ziqiao Wang ,&nbsp;Yongkang Chen ,&nbsp;Yucai Guo ,&nbsp;Xiaoming Li ,&nbsp;Yanmei Li ,&nbsp;Peinan Zhang ,&nbsp;Xiangyan Hou ,&nbsp;Chun Luo ,&nbsp;Wei Zhao ,&nbsp;Jin Niu","doi":"10.1016/j.aqrep.2025.102875","DOIUrl":"10.1016/j.aqrep.2025.102875","url":null,"abstract":"<div><div><em>Haematococcus pluvialis</em> enriched natural astaxanthin is widely used as a functional additive in the farming industry. The objective of this study was to evaluate the effects of dietary supplementation with <em>H. pluvialis</em> powder on growth performance, pigmentation, hepatic and intestinal morphology, antioxidant capacity, and immunity of golden pompano (<em>Trachinotus ovatus</em>). Six isonitrogenous and isolipidic experimental diets, which were formulated to contain 0 % (D1), 0.02 % (D2), 0.04 % (D3), 0.08 % (D4), 0.16 % (D5), and 0.32 % (D6) <em>H. pluvialis</em> powder, were used in the 54-day feeding trial. <em>T. ovatus</em> fed with 0.16 % <em>H. pluvialis</em> showed the greatest levels of FBW, WGR, SGR, and FI. Additionally, across all treatments, the anal fin in the fish given 0.16 % and 0.32 % <em>H. pluvialis</em> displayed increased yellowness (b*), while the tail fin's redness (a*) was considerably higher in the 0.08 % and 0.16 % <em>H. pluvialis</em> treatments. The hepatic morphology result showed that <em>H. pluvialis</em> didn’t influence the health status of the liver, and the activity of CAT decreased in all <em>H. pluvialis</em>-supplemented groups. Compared to other concentrations, the 0.16 % and 0.32 % <em>H. pluvialis</em> groups increased intestinal villi height and amylase activity. The hepatic gene expression showed that 0.16 % <em>H. pluvialis</em> upregulated the expression of kelch ECH-associated protein 1 (<em>keap1</em>), glutathione peroxidase (<em>gsh-px</em>), proliferator-activated receptor α (<em>pparα</em>), interleukin-10 (<em>il-10</em>), and transforming growth factor β (<em>tgf-β</em>), meanwhile, the mRNA level of complement component 4 (<em>c4</em>), superoxide dismutase (<em>sod</em>), and sterol regulatory element-binding protein 1 (<em>srebp1</em>) increased in the intestine. Overall, dietary supplementation with 0.16 % <em>H. pluvialis</em> could improve growth performance, pigmentation in fins, digestive capacity of the intestine, and gene expression related to antioxidant capacity, immunity, and lipid metabolism in <em>T. ovatus</em>.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"43 ","pages":"Article 102875"},"PeriodicalIF":3.2,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071903","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 estradiol exposure on lipid metabolism in male and female sea cucumber Apostichopus japonicus","authors":"Shuangyan Zhang ,&nbsp;Libin Zhang ,&nbsp;David Gonçalves ,&nbsp;Jialei Xu","doi":"10.1016/j.aqrep.2025.102881","DOIUrl":"10.1016/j.aqrep.2025.102881","url":null,"abstract":"<div><div>Lipids are important energy storage nutrients and signalling molecules for reproduction. Steroid hormones, including estradiol (E₂), have been shown to play a key regulatory role in lipid metabolism in vertebrates. However, not much is known on the action of sex steroids in lipid metabolism in invertebrates. This study investigated the impact of exogenous E₂ administration in lipid metabolism of male and female sea cucumber <em>Apostichopus japonicus</em>. Control females had higher crude lipid content in the body wall, but not in the intestines, as compared to control males. E₂ administration significantly reduced the total lipid content in the intestine and body wall of females, but not males. The analysis of intestinal metabolites and gene expression of <em>A. japonicus</em> showed that E₂ significantly affected the expression of genes and the levels of metabolites related with lipid metabolism pathway. The metabolism of sex hormones, triglycerides and fatty acids in females was more active as compared to males. The fatty acid degradation and glycerophospholipid metabolism pathways were disturbed by E₂ administration in males. E₂ significantly inhibited the activity of catalase (CAT) in the coelomic fluid, and it is speculated that E₂ may have disrupted lipid metabolism by inducing oxidative imbalance in males by targeting the glycerophospholipid metabolism pathway. The study confirms that sex steroids play a significant role in regulating physiological functions in echinoderms and, in particular, that E₂ might modulate lipid metabolism, as described for vertebrates. The results also suggest that exogenous administration of sex steroids could be used as a tool to regulate reproductive function to improve the rearing of <em>A. japonicus</em>.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"43 ","pages":"Article 102881"},"PeriodicalIF":3.2,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071900","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":"Dietary bile acids alleviate dextran sulfate sodium-induced enteritis in juvenile leopard coral grouper (Plectropomus leopardus)","authors":"Shengpeng Wang ,&nbsp;Longting Zhang ,&nbsp;Jie Huang ,&nbsp;Qingcong Fu ,&nbsp;Dingqian Guo ,&nbsp;Yujie Gao","doi":"10.1016/j.aqrep.2025.102876","DOIUrl":"10.1016/j.aqrep.2025.102876","url":null,"abstract":"<div><div>Enteritis is a common disease in leopard coral grouper reared under intensive aquaculture conditions. We developed an enteritis model by feeding fish with 0.75 % dextran sulfate sodium (DSS) diet for one week, followed by a three-week period with diets containing graded bile acids levels (0 %, 0.15 %, 0.30 %, 0.45 %, 0.60 %). They were designated as DSSBA0, DSSBA15, DSSBA30, DSSBA45, and DSSBA60, with an control group received no DSS treatment. The results showed that growth performance was significantly impaired in the DSSBA0 group compared with the control group (<em>P</em> &lt; 0.05), while it improved markedly as the bile acids levels increased (<em>P</em> &lt; 0.05). Intestinal indices were significantly enhanced in the dietary bile acids groups, particularly in the DSSBA60 group (<em>P</em> &lt; 0.05). Meanwhile, bile acids supplementation ameliorated DSS induced intestinal damage, including villus atrophy and reduced muscular layer thickness. Moreover, the gene expression of tight junction proteins (<em>zo1</em>, <em>zo2</em>, <em>zo3</em>, <em>occludin</em> and <em>claudin-1</em>) were significantly increased in higher bile acids treatment groups compared with the DSSBA0 group (<em>P</em> &lt; 0.05). Furthermore, gene expression analysis indicated that pro-inflammatory cytokines (<em>tnf-α</em>, <em>inf-γ</em>, <em>il-1β</em>, <em>il-6</em>, <em>il-8</em>) were down-regulated, while the anti-inflammatory cytokine <em>il-10</em> was up-regulated in the higher bile acids groups (DSSBA45 and DSSBA60) compared with the DSSBA0 group (<em>P</em> &lt; 0.05). And the activities of enzymes associated with intestinal inflammation, including myeloperoxidase (MPO) and β-N-acetyl-D-glucosaminidase (NAG), were significantly reduced in the groups supplemented with bile acids. Microbial diversity analysis through 16S rRNA sequencing indicated that dietary bile acids notably increased the abundance of Firmicutes and <em>Candidatus-Arthromitus</em>. The above findings provide strong evidence that bile acids effectively alleviate enteritis in leopard coral grouper by preserving intestinal integrity, modulating inflammatory responses, and enhanced beneficial bacteria abundance. These findings provide a novel nutritional strategy for improving gut health in aquaculture, offering valuable insights for sustainable fish farming.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"43 ","pages":"Article 102876"},"PeriodicalIF":3.2,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071904","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}