Aquaculture Reports最新文献

Responses of largemouth bass (Micropterus salmoides) to chronic alkalinity stress: Survival, growth performance, physiology, and muscle quality

IF 3.2 2区农林科学 Q1 FISHERIES

Aquaculture Reports

Pub Date : 2025-04-15 DOI: 10.1016/j.aqrep.2025.102802

Xi Shi , Shijie Yuan , Wei Peng , Fengqing Chen , Xiangwei Liu , Xueke Ma , Xiao Ma , Ruwei Xu , Khor Waiho , Xianghui Kong , Cuiyun Lu , Xuejun Li

Saline-alkaline water fishery has emerged as a highly promising aquaculture mode in China. To identify potential species suitable for saline-alkaline water aquaculture, this study investigated the effects of different alkalinity stresses (0, 7, 14, 21, 28 mmol/L) on the survival, growth performance, physiology, and muscle quality of largemouth bass Micropterus salmoides. A total of 450 fish (5.58 ± 0.09 g) were randomly allocated to 15 tanks, with three replicates for each group. The experiment lasted for two months. The results indicated that alkalinity stress exhibited no significant impact on the survival rate but significantly reduced growth performance. Compared with the control group, the ALK-28 group exhibited a significantly higher feed conversion ratio and a relatively lower protein efficiency ratio. Physiologically, as alkalinity increased, the concentrations of Na⁺ and Mg²⁺, along with the Na⁺/K⁺-ATPase and Ca²⁺/Mg²⁺-ATPase activities, showed an upward trend. Histologically, alkalinity stress induced some injuries to gills, including gill lamella hyperplasia, abnormal blood cells accumulation, and chloride cells rupture. For muscle nutrition and quality, no significant differences in the nutritional composition and water-holding capacity among treatments were observed. However, ALK-14 significantly enhanced the flavor and nutritional values of amino acids and fatty acids, and ALK-28 significantly improved textural characteristics, including higher hardness, chewiness, and resilience. These results suggested that largemouth bass is a potentially economic candidate species for saline-alkaline water aquaculture because it can survive and show advantages in muscle nutrition and quality under high alkalinity conditions.

盐碱水域渔业已成为中国极具潜力的水产养殖模式。为了确定适合盐碱地水产养殖的潜在品种，本研究考察了不同碱度胁迫（0、7、14、21、28 mmol/L）对大口鲈（Micropterus salmoides）存活、生长性能、生理和肌肉质量的影响。共 450 尾鱼（5.58 ± 0.09 克）被随机分配到 15 个鱼缸中，每组三个重复。实验持续了两个月。结果表明，碱度胁迫对存活率无明显影响，但会显著降低生长性能。与对照组相比，ALK-28 组的饲料转化率明显较高，蛋白质效率比则相对较低。从生理学角度来看，随着碱度的增加，Na+和Mg2+的浓度以及Na+/K+-ATP酶和Ca2+/Mg2+-ATP酶的活性呈上升趋势。从组织学角度来看，碱度胁迫会对鳃造成一些损伤，包括鳃片增生、异常血细胞堆积和氯化物细胞破裂。在肌肉营养和质量方面，各处理的营养成分和持水能力无显著差异。然而，ALK-14 能明显提高风味和氨基酸与脂肪酸的营养价值，ALK-28 能明显改善质地特征，包括更高的硬度、咀嚼性和回弹性。这些结果表明，大口鲈是盐碱水养殖的潜在经济候选物种，因为它能在高碱度条件下生存，并在肌肉营养和质量方面表现出优势。

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引用次数: 0

Dietary taurine supplementation can improve the growth, protein metabolism, immunity and muscle development of larval largemouth bass (Micropterus salmoides)

IF 3.2 2区农林科学 Q1 FISHERIES

Aquaculture Reports

Pub Date : 2025-04-15 DOI: 10.1016/j.aqrep.2025.102817

Qing Zhou , Siying Hu , Jiacheng Yu , Can Li , Xi Liu , Chen Zhou , Chengmin Zhao , Kai Luo , Weihua Gao , Chenglong Wu

This study aimed to explore the impact of dietary taurine supplementation on the growth, amino acid transport, protein metabolism, immunity, and muscle and skeletal development of larval largemouth bass (Micropterus salmoides). The larvae (initial weight: 367.53 ± 0.05 mg) were fed with six graded levels of dietary taurine (0 % (control group), 0.15 %, 0.3 %, 0.6 %, 1.2 %, and 2.4 %) for 21 days, which was sufficient for the duration of feeding trial of fish larvae. Results indicated that the weight gain rate and specific growth rate (SGR) of larvae showed a quadratic increase after dietary taurine supplementation (P < 0.05), reaching a maximum in the 0.3 % group. The protease activity was significantly enhanced by 0.3 % of dietary taurine (P < 0.05). The crude protein and amino acid content in the larvae were increased with taurine supplementation, peaking at 0.3 % (P < 0.05). The average myofiber diameter was also significantly enhanced in the 0.3 % group (P < 0.05). Compared to the control group, the supplementation of 0.3 % dietary taurine could upregulate the expressions of amino acid transport protein genes (P < 0.05). The TOR pathway was triggered by 0.3 % of dietary taurine. The AAR, autophagy-lysosome, ubiquitin-proteasome, and calpain pathways were inhibited by 0.3 % dietary taurine. The expressions of myocyte proliferation-related genes (such as Pax3a, MHC, MyoD) and MyoD protein, and Mstn were significantly increased and decreased by dietary taurine, respectively (P < 0.05). In addition, the mRNA levels of skeletal development-related genes were upregulated. Furthermore, dietary taurine supplementation upregulated anti-inflammatory and anti-apoptotic gene expressions, and reduced pro-inflammatory and apoptotic factor expressions in the liver. In summary, dietary taurine enhanced intestinal protein digestion and amino acid absorption, facilitated muscle protein deposition and myofiber development, and improved immunity and skeletal growth, thereby promoting growth in larval largemouth bass. Regression analysis based on the SGR revealed that the optimal taurine supplementation level was 0.288 %.

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引用次数: 0

Composition of California’s aquaculture industry and surveying its disease challenges and management strategies

IF 3.2 2区农林科学 Q1 FISHERIES

Aquaculture Reports

Pub Date : 2025-04-15 DOI: 10.1016/j.aqrep.2025.102799

Alex Wright, Carly Moody, Jackson Gross

California (CA) aquaculture is best characterized by its diversity of production systems, cultured species, and final products. The industry comprises four major sectors (i.e., finfish, shellfish, macroalgae, and natural resource agency), which raise aquatic organisms for a variety of purposes, such as sustenance, conservation, recreation, and scientific research. In terms of commercial production value, California aquaculture contributes roughly 6 % to the total value of the U.S. aquaculture industry. The predominant forms of commercial aquaculture in CA are the production of finfish and shellfish for human consumption, which contribute 40.2 % and 30.0 %, respectively, to the total production value of the industry. Other forms of commercial aquaculture in CA include the production of sportfish species for recreational fishing, and other seafood products like caviar and macroalgae. Natural resource agencies, such as the California Department of Fish and Wildlife (CDFW), are also significant aquaculture producers that raise salmonids for conservation and recreation purposes. The diversity within CA aquaculture requires an equally diverse set of disease management strategies that address the specific needs of each sector. A recent survey on aquatic animal health indicates that California finfish and shellfish facility managers are aware of disease challenges and use a preventative approach to reduce the likelihood of disease outbreaks. Our survey results suggest that when disease is detected, non-prescription antimicrobial products (i.e., hydrogen peroxide) are used most frequently for disease treatment (71 % commercial, 17 % commercial shellfish, 86 % CDFW), while prescription antibiotics are only utilized following veterinary review and approval (18 % commercial finfish, 0 % commercial shellfish, 71 % CDFW). Biosecurity and disease-response protocols are also important components of disease management, and their standardization across each sector will enhance the disease prevention capabilities of the aquaculture industry.

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引用次数: 0

Growth performance, flesh fatty acid profile and transcriptome analyses of hybrid Jinhu grouper (Epinephelus fuscoguttatus ♀ × Epinephelus tukula ♂) cultured in Deeper-Offshore Aquaculture System 深近海养殖杂交金湖石斑鱼（Epinephelus fuscoguttatus ♀ × Epinephelus tukula ♂）的生长性能、肉质脂肪酸谱和转录组分析

IF 3.2 2区农林科学 Q1 FISHERIES

Aquaculture Reports

Pub Date : 2025-04-14 DOI: 10.1016/j.aqrep.2025.102794

Ziyi Wu , Wenjie Lai , Qinxi Dai , Zhenjiang Zou , Yuyou Lu , Jiachang Xu , Yakang Song , Jingpeng Hou , Haoran Lin , Yong Zhang , Jin Zhang , Danqi Lu

Amid the rapid growth of offshore aquaculture in China, a Deeper Offshore Aquaculture System (DOAS) for hybrid Jinhu groupers (Epinephelus fuscoguttatus♀× Epinephelus tukula♂) has been established in Guangdong. This study aims to elucidate the biological and metabolic differences between Jinhu groupers cultured in Recirculating Aquaculture Systems (RAS) and those in DOAS. A three-month growth comparison experiment was conducted to assess the developmental differences of Jinhu groupers. This research reveals significant variations in growth performance and flesh fatty acid composition between fish from these two systems, particularly in the content of eicosapentaenoic acid and nine other fatty acids. Through transcriptome analysis of liver and muscle tissues, 278 and 186 differentially expressed genes were identified, respectively, highlighting notable metabolic shifts. Key pathways affected include lipid metabolism and muscle fiber growth. These insights deepen the understanding of the acclimation mechanisms of Jinhu groupers to diverse aquaculture settings and offer valuable strategies for optimizing deeper offshore aquaculture practices, enhancing the sustainability and efficiency of the industry.

{"title":"Growth performance, flesh fatty acid profile and transcriptome analyses of hybrid Jinhu grouper (Epinephelus fuscoguttatus ♀ × Epinephelus tukula ♂) cultured in Deeper-Offshore Aquaculture System","authors":"Ziyi Wu , Wenjie Lai , Qinxi Dai , Zhenjiang Zou , Yuyou Lu , Jiachang Xu , Yakang Song , Jingpeng Hou , Haoran Lin , Yong Zhang , Jin Zhang , Danqi Lu","doi":"10.1016/j.aqrep.2025.102794","DOIUrl":"10.1016/j.aqrep.2025.102794","url":null,"abstract":"<div><div>Amid the rapid growth of offshore aquaculture in China, a Deeper Offshore Aquaculture System (DOAS) for hybrid Jinhu groupers (<em>Epinephelus fuscoguttatus</em>♀× <em>Epinephelus tukula</em>♂) has been established in Guangdong. This study aims to elucidate the biological and metabolic differences between Jinhu groupers cultured in Recirculating Aquaculture Systems (RAS) and those in DOAS. A three-month growth comparison experiment was conducted to assess the developmental differences of Jinhu groupers. This research reveals significant variations in growth performance and flesh fatty acid composition between fish from these two systems, particularly in the content of eicosapentaenoic acid and nine other fatty acids. Through transcriptome analysis of liver and muscle tissues, 278 and 186 differentially expressed genes were identified, respectively, highlighting notable metabolic shifts. Key pathways affected include lipid metabolism and muscle fiber growth. These insights deepen the understanding of the acclimation mechanisms of Jinhu groupers to diverse aquaculture settings and offer valuable strategies for optimizing deeper offshore aquaculture practices, enhancing the sustainability and efficiency of the industry.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"42 ","pages":"Article 102794"},"PeriodicalIF":3.2,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143825539","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}

引用次数: 0

Dietary lauric acid improves the protein utilization and muscle growth by promoting intestinal flora and glycolysis in mud crab (Scylla paramamosain)

IF 3.2 2区农林科学 Q1 FISHERIES

Aquaculture Reports

Pub Date : 2025-04-14 DOI: 10.1016/j.aqrep.2025.102816

Wenhao Zhan , Shichao Xie , Yao Deng , Hongyu Peng , Haiqing Cao , Zheng Tang , Yinqiu Tian , Yu Zhang , Tingting Zhu , Min Jin , Qicun Zhou

At present, the rapid development of aquaculture is restricted by the shortage of fishmeal, and it is particularly important to find ways to replace and reduce fishmeal. It is worth exploring whether feed with lower-than-normal protein requirements have adverse effects on the growth of aquatic animals. The aim of the present study was to improve the growth performance of mud crab (Scylla paramamosain) by adding lauric acid (LA) and glycerol mono-laurate (GML) to a low protein diet (41.8 % crude protein). Adding 1 g/kg LA or 0.5 g/kg GML to low protein diet can significantly ameliorate the negative effects of low protein diet on mud crabs, and improve the survival and growth performance. In addition, dietary LA or GML supplementation can enhance protein apparent digestibility (ADP), increase protein and amino acid content in muscle, and optimize protein metabolism process. Notably, dietary LA and GML supplementation can activate the glycolytic pathway in muscles and up-regulate the expression of genes related to muscle growth. Moreover, the results of intestinal flora indicated that dietary GML and LA increased the abundance of Rhodobacteraceae, Erysipelotrichaceae, Endozoicomonadaceae and Ruegeria. These flora exhibited a positive correlation with protein digestion, absorption and deposition. In conclusion, the supplementation of LA or GML in low-protein diets can effectively improve growth performance, activate muscle glycolysis pathway, promote muscle development, increase microbial abundance related to protein metabolism, and improve protein apparent digestibility.

{"title":"Dietary lauric acid improves the protein utilization and muscle growth by promoting intestinal flora and glycolysis in mud crab (Scylla paramamosain)","authors":"Wenhao Zhan , Shichao Xie , Yao Deng , Hongyu Peng , Haiqing Cao , Zheng Tang , Yinqiu Tian , Yu Zhang , Tingting Zhu , Min Jin , Qicun Zhou","doi":"10.1016/j.aqrep.2025.102816","DOIUrl":"10.1016/j.aqrep.2025.102816","url":null,"abstract":"<div><div>At present, the rapid development of aquaculture is restricted by the shortage of fishmeal, and it is particularly important to find ways to replace and reduce fishmeal. It is worth exploring whether feed with lower-than-normal protein requirements have adverse effects on the growth of aquatic animals. The aim of the present study was to improve the growth performance of mud crab (<em>Scylla paramamosain</em>) by adding lauric acid (LA) and glycerol mono-laurate (GML) to a low protein diet (41.8 % crude protein). Adding 1 g/kg LA or 0.5 g/kg GML to low protein diet can significantly ameliorate the negative effects of low protein diet on mud crabs, and improve the survival and growth performance. In addition, dietary LA or GML supplementation can enhance protein apparent digestibility (ADP), increase protein and amino acid content in muscle, and optimize protein metabolism process. Notably, dietary LA and GML supplementation can activate the glycolytic pathway in muscles and up-regulate the expression of genes related to muscle growth. Moreover, the results of intestinal flora indicated that dietary GML and LA increased the abundance of Rhodobacteraceae, Erysipelotrichaceae, Endozoicomonadaceae and <em>Ruegeria</em>. These flora exhibited a positive correlation with protein digestion, absorption and deposition. In conclusion, the supplementation of LA or GML in low-protein diets can effectively improve growth performance, activate muscle glycolysis pathway, promote muscle development, increase microbial abundance related to protein metabolism, and improve protein apparent digestibility.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"42 ","pages":"Article 102816"},"PeriodicalIF":3.2,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829815","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}

引用次数: 0

Fasting and re-feeding effects for the new measurement to improve feed efficiency traits in Pacific abalone (Haliotis discus hannai) 为提高太平洋鲍鱼（Haliotis discus hannai）饲料效率特性而进行的新测量的禁食和再喂效果

IF 3.2 2区农林科学 Q1 FISHERIES

Aquaculture Reports

Pub Date : 2025-04-14 DOI: 10.1016/j.aqrep.2025.102793

Ziheng Yin , Wenchao Yu , Junyu Liu , Jianzhong Weng , Jie Huang , Miaoqin Huang , Jinwei Ke , Xuan Luo , Caihuan Ke , Weiwei You

To speed up the process of measuring abalone for feed efficiency traits and apply the technique in commercial breeding programs, we developed a new evaluation index by fasting and re-feeding treatment. A total of 400 ten-month-old Pacific abalone (Haliotis discus hannai) were randomly sampled. To evaluate feed efficiency traits, each abalone was cultured for 72 days using the previously established single-individual system. After that, the FER was ranked after removing outliers, the top and bottom 150 individuals were exposed to different durations of fasting stress (3, 7, 10, 14, and 21 days), which was followed by single-individual re-feeding treatments. The fluctuations in body weight of each abalone during this process were recorded. The difference in the ability to cope with fasting stress and re-feed between the high- and low-FER (feed efficiency ratio) groups was analyzed. The findings demonstrated that the specific weight loss rate (SWLR) of the high- and low-FER groups of Pacific abalone differed after varying durations of fasting. The results of the correlation analysis between FER and weight change index showed that SWLR was negatively correlated with FER during stress, and the correlation of the 7-day fasting group (S7) was the highest (r = –0.71). The “rapid growth stage” during re-feeding was positively correlated with FER, and the correlation between the body weight gain (BWG) of days 14–28 and FER in the 10-day fasting group (S10) was the highest (r = 0.79). The results indicate that there is significant variation in the capacity of abalone to resist fasting stress and re-feeding, and this is associated with feed efficiency. The above measured indicators (SWLR of the S7 group and BWG14–28 of the S10 group) may be used as indirect indicators for feed efficiency traits, and these indicators have application value in abalone breeding.

{"title":"Fasting and re-feeding effects for the new measurement to improve feed efficiency traits in Pacific abalone (Haliotis discus hannai)","authors":"Ziheng Yin , Wenchao Yu , Junyu Liu , Jianzhong Weng , Jie Huang , Miaoqin Huang , Jinwei Ke , Xuan Luo , Caihuan Ke , Weiwei You","doi":"10.1016/j.aqrep.2025.102793","DOIUrl":"10.1016/j.aqrep.2025.102793","url":null,"abstract":"<div><div>To speed up the process of measuring abalone for feed efficiency traits and apply the technique in commercial breeding programs, we developed a new evaluation index by fasting and re-feeding treatment. A total of 400 ten-month-old Pacific abalone (<em>Haliotis discus hannai</em>) were randomly sampled. To evaluate feed efficiency traits, each abalone was cultured for 72 days using the previously established single-individual system. After that, the FER was ranked after removing outliers, the top and bottom 150 individuals were exposed to different durations of fasting stress (3, 7, 10, 14, and 21 days), which was followed by single-individual re-feeding treatments. The fluctuations in body weight of each abalone during this process were recorded. The difference in the ability to cope with fasting stress and re-feed between the high- and low-FER (feed efficiency ratio) groups was analyzed. The findings demonstrated that the specific weight loss rate (SWLR) of the high- and low-FER groups of Pacific abalone differed after varying durations of fasting. The results of the correlation analysis between FER and weight change index showed that SWLR was negatively correlated with FER during stress, and the correlation of the 7-day fasting group (S7) was the highest (r = –0.71). The “rapid growth stage” during re-feeding was positively correlated with FER, and the correlation between the body weight gain (BWG) of days 14<strong>–</strong>28 and FER in the 10-day fasting group (S10) was the highest (r = 0.79). The results indicate that there is significant variation in the capacity of abalone to resist fasting stress and re-feeding, and this is associated with feed efficiency. The above measured indicators (SWLR of the S7 group and BWG14–28 of the S10 group) may be used as indirect indicators for feed efficiency traits, and these indicators have application value in abalone breeding.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"42 ","pages":"Article 102793"},"PeriodicalIF":3.2,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143828956","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}

引用次数: 0

Effects of different co-feeding strategies on growth, body chemical composition, digestive enzymes, and expression of gh and igf-1 genes in Beluga sturgeon (Huso huso) larvae

IF 3.2 2区农林科学 Q1 FISHERIES

Aquaculture Reports

Pub Date : 2025-04-12 DOI: 10.1016/j.aqrep.2025.102812

Soheil Yousefi , Majidreza Khoshkholgh , Zabihollah Pajand , Maryam Monsef Shokri , Hamid Allaf Noveirian

This study evaluates the effect of different feeding regimes on the growth performance, body composition, digestive enzyme activity, and the expression of growth-related genes of Beluga sturgeon (Huso huso) larvae. A total of 1200 larvae (mean weight 0.44 ± 0.01 g) were divided into four treatments and fed either with formulated diet only (FD) or a combination of formulated diet and live food including chironomids (CHFD), Artemia (ABFD), or both (MFD) for 42 days. The results indicated that, despite the higher weight gain (WG) and protein content of the FD group, it had the lowest survival rate (SR) as compared to other treatments (P < 0.05). The CHFD treatment had the highest SR, condition factor, and higher WG than ABFD and MFD groups (P < 0.05). The protein and lipid content increased significantly in FD and ABFD groups, respectively (P < 0.05). The total fatty acids, MUFA, EPA/ARA, and n-3/n-6 ratios were also increased in all treatments at the end of the trial (P < 0.05). DHA levels were also higher in CHFD and FD groups with no significant difference in PUFA between the groups (P > 0.05). The results of digestive enzymes showed higher trypsin activity in CHFD and ABFD groups, which may suggest the adaptation of the fish to the formulated diet. Gene expression analysis revealed that gh levels were higher in FD and ABFD groups while igf1 was up regulated in CHFD group (P < 0.05). These findings suggest that using chironomids during the transition to a formulated diet in Beluga sturgeon larvae can significantly enhanced growth performance and survival, body composition, enzyme activity, and the expression of growth-related genes.

本研究评估了不同饲养方式对白鲟（Huso huso）幼体的生长性能、体成分、消化酶活性和生长相关基因表达的影响。将 1200 尾幼体（平均体重 0.44 ± 0.01 克）分成四个处理，分别喂养 42 天，或只喂养配方饲料（FD），或混合喂养配方饲料和活饵料（包括摇蚊（CHFD）、蒿（ABFD）或两者（MFD））。结果表明，尽管 FD 组的增重（WG）和蛋白质含量较高，但与其他处理相比，其存活率（SR）最低（P < 0.05）。与 ABFD 组和 MFD 组相比，CHFD 处理的 SR、条件因子和 WG 最高（P < 0.05）。FD组和ABFD组的蛋白质和脂质含量分别明显增加（P < 0.05）。试验结束时，所有处理的总脂肪酸、MUFA、EPA/ARA 和 n-3/n-6 比率也都有所增加（P <0.05）。CHFD 组和 FD 组的 DHA 含量也较高，而各组之间的 PUFA 没有显著差异（P > 0.05）。消化酶的检测结果显示，CHFD 组和 ABFD 组的胰蛋白酶活性较高，这可能表明鱼类适应了配方饲料。基因表达分析表明，FD 组和 ABFD 组的 gh 水平较高，而 CHFD 组的 igf1 水平较高（P < 0.05）。这些研究结果表明，在白鲟幼鱼过渡到配方饲料的过程中，使用摇蚊能显著提高其生长性能和存活率、身体成分、酶活性以及生长相关基因的表达。

{"title":"Effects of different co-feeding strategies on growth, body chemical composition, digestive enzymes, and expression of gh and igf-1 genes in Beluga sturgeon (Huso huso) larvae","authors":"Soheil Yousefi , Majidreza Khoshkholgh , Zabihollah Pajand , Maryam Monsef Shokri , Hamid Allaf Noveirian","doi":"10.1016/j.aqrep.2025.102812","DOIUrl":"10.1016/j.aqrep.2025.102812","url":null,"abstract":"<div><div>This study evaluates the effect of different feeding regimes on the growth performance, body composition, digestive enzyme activity, and the expression of growth-related genes of Beluga sturgeon (<em>Huso huso</em>) larvae. A total of 1200 larvae (mean weight 0.44 ± 0.01 g) were divided into four treatments and fed either with formulated diet only (FD) or a combination of formulated diet and live food including chironomids (CHFD), Artemia (ABFD), or both (MFD) for 42 days. The results indicated that, despite the higher weight gain (WG) and protein content of the FD group, it had the lowest survival rate (SR) as compared to other treatments (P < 0.05). The CHFD treatment had the highest SR, condition factor, and higher WG than ABFD and MFD groups (P < 0.05). The protein and lipid content increased significantly in FD and ABFD groups, respectively (P < 0.05). The total fatty acids, MUFA, EPA/ARA, and n-3/n-6 ratios were also increased in all treatments at the end of the trial (P < 0.05). DHA levels were also higher in CHFD and FD groups with no significant difference in PUFA between the groups (P > 0.05). The results of digestive enzymes showed higher trypsin activity in CHFD and ABFD groups, which may suggest the adaptation of the fish to the formulated diet. Gene expression analysis revealed that <em>gh</em> levels were higher in FD and ABFD groups while <em>igf1</em> was up regulated in CHFD group (P < 0.05). These findings suggest that using chironomids during the transition to a formulated diet in Beluga sturgeon larvae can significantly enhanced growth performance and survival, body composition, enzyme activity, and the expression of growth-related genes.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"42 ","pages":"Article 102812"},"PeriodicalIF":3.2,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143823539","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}

引用次数: 0

Effects of soybean oligosaccharides on water quality and microbial community in biofloc systems

IF 3.2 2区农林科学 Q1 FISHERIES

Aquaculture Reports

Pub Date : 2025-04-12 DOI: 10.1016/j.aqrep.2025.102798

Huiying Ma , Mengping Tian , Rongfei Zhang , Jianhua Zhao , Qiyou Xu , Ming Duan

The aim of this study was to investigate the effect of soybean oligosaccharides (SBOS) on water quality and microbial communities in biofloc systems. A mixture of starch and glucose (3:7) as a carbon source was used as the control group (Con), and the mixture was replaced with SBOS by 2.5 % (DD1), 5 % (DD2), 7.5 % (DD3), and 10 % (DD4) with C: N of 15 as the experimental group with a duration of 30 days. Results indicated that, compared with control group, the accumulation of nitrite nitrogen (NO_-2-N) was reduced in DD2, DD3, and DD4 by the 7th day (P < 0.05)；the biofloc volume (FV) peaked in DD4 on the 14th day (P < 0.05), and there was a significant reduction in nitrate nitrogen (NO_-3-N) accumulation in DD2 by the 28th day (P < 0.05). In addition, compared with control group, the abundance of Sphingobacterium, Deinococcus was significantly decreased and Bdellovibrio, Niveispirillum was significantly increased in DD2 (P < 0.05), the metabolic pathways related to transport, signal transduction and nucleotide metabolism was decreased, while metabolism of terpenoids and polyketides, lipid metabolism, and xenobiotics biodegradation and metabolism were increased in DD2 (P < 0.05). In summary, 5 % SBOS as a carbon source in biofloc systems improved water quality, promoted the population of beneficial bacteria, and reduced the population of harmful bacteria. This study provides both theoretical and practical support for the application of SBOS in biofloc systems, promoting sustainable aquaculture growth and the well-being of aquatic environments.

{"title":"Effects of soybean oligosaccharides on water quality and microbial community in biofloc systems","authors":"Huiying Ma , Mengping Tian , Rongfei Zhang , Jianhua Zhao , Qiyou Xu , Ming Duan","doi":"10.1016/j.aqrep.2025.102798","DOIUrl":"10.1016/j.aqrep.2025.102798","url":null,"abstract":"<div><div>The aim of this study was to investigate the effect of soybean oligosaccharides (SBOS) on water quality and microbial communities in biofloc systems. A mixture of starch and glucose (3:7) as a carbon source was used as the control group (Con), and the mixture was replaced with SBOS by 2.5 % (DD1), 5 % (DD2), 7.5 % (DD3), and 10 % (DD4) with C: N of 15 as the experimental group with a duration of 30 days. Results indicated that, compared with control group, the accumulation of nitrite nitrogen (NO<sub>-2</sub>-N) was reduced in DD2, DD3, and DD4 by the 7th day (<em>P</em> < 0.05)；the biofloc volume (FV) peaked in DD4 on the 14th day (<em>P</em> < 0.05), and there was a significant reduction in nitrate nitrogen (NO<sub>-3</sub>-N) accumulation in DD2 by the 28th day (<em>P</em> < 0.05). In addition, compared with control group, the abundance of <em>Sphingobacterium, Deinococcus</em> was significantly decreased and <em>Bdellovibrio, Niveispirillum</em> was significantly increased in DD2 (<em>P</em> < 0.05), the metabolic pathways related to transport, signal transduction and nucleotide metabolism was decreased, while metabolism of terpenoids and polyketides, lipid metabolism, and xenobiotics biodegradation and metabolism were increased in DD2 (<em>P</em> < 0.05). In summary, 5 % SBOS as a carbon source in biofloc systems improved water quality, promoted the population of beneficial bacteria, and reduced the population of harmful bacteria. This study provides both theoretical and practical support for the application of SBOS in biofloc systems, promoting sustainable aquaculture growth and the well-being of aquatic environments.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"42 ","pages":"Article 102798"},"PeriodicalIF":3.2,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143821311","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}

引用次数: 0

Single-cell protein as an alternative protein source in feed for juvenile sea cucumber

IF 3.2 2区农林科学 Q1 FISHERIES

Aquaculture Reports

Pub Date : 2025-04-12 DOI: 10.1016/j.aqrep.2025.102795

Jiayin Zhang , Ning Chen , Yongcui Sha , Shanfei Fu , Chao Li , Qiang Xu , Fei Gao , Haiqing Wang

Single-cell protein (SCP) has a nutritional profile that is comparable to most conventional protein sources, and can be produced with a lower environmental footprint. Finding alternative and palatable protein sources for juvenile sea cucumber feed may address the issue of slow growth during this stage. To assess the efficiency of SCP as an alternative protein source for juvenile sea cucumbers Stichopus monotuberculatus, a study was conducted with five levels of single-cell protein replacement in the feed (0 %, 10 %, 15 %, 20 %, and 25 %) to evaluate its effects on growth performance, biochemical composition, digestive and immune enzyme activities. The results revealed that the optimal 15 % replacement of single-cell protein in the diet significantly improved the growth performance of S. monotuberculatus. This could be attributed to the enhanced immune enzyme activities resulting from the inclusion of single-cell protein, with the 15 % treatment showing the most significant increase in these values. The amino acid composition was similar across the treatments, but the ratio of essential amino acids increased with inclusion of single-cell protein. As the single-cell protein inclusion increased, the levels of polyunsaturated fatty acids, such as C18:2n-6, C20:2n-6, C20:4n-6 and C20:5n-3 also increased, especially C20:4n-6 and C20:5n-3. Similar to the control, the replacement with single-cell protein did not have adverse effects on the activities of pepsin, trypsin, and lipase. In conclusion, single-cell protein has positive impacts on the growth, feed conversion rate, the biochemical composition of S. monotuberculatus and its immune capacity, which indicates that the single-cell protein has the potential to replace fishmeal as a new effective protein for sea cucumber. We concluded that this SCP can be as a sustainable substitute, capable of replacing 15 % of protein in the diet of juvenile sea cucumber, positively promoting their performance.

{"title":"Single-cell protein as an alternative protein source in feed for juvenile sea cucumber","authors":"Jiayin Zhang , Ning Chen , Yongcui Sha , Shanfei Fu , Chao Li , Qiang Xu , Fei Gao , Haiqing Wang","doi":"10.1016/j.aqrep.2025.102795","DOIUrl":"10.1016/j.aqrep.2025.102795","url":null,"abstract":"<div><div>Single-cell protein (SCP) has a nutritional profile that is comparable to most conventional protein sources, and can be produced with a lower environmental footprint. Finding alternative and palatable protein sources for juvenile sea cucumber feed may address the issue of slow growth during this stage. To assess the efficiency of SCP as an alternative protein source for juvenile sea cucumbers <em>Stichopus monotuberculatus</em>, a study was conducted with five levels of single-cell protein replacement in the feed (0 %, 10 %, 15 %, 20 %, and 25 %) to evaluate its effects on growth performance, biochemical composition, digestive and immune enzyme activities. The results revealed that the optimal 15 % replacement of single-cell protein in the diet significantly improved the growth performance of <em>S. monotuberculatus</em>. This could be attributed to the enhanced immune enzyme activities resulting from the inclusion of single-cell protein, with the 15 % treatment showing the most significant increase in these values. The amino acid composition was similar across the treatments, but the ratio of essential amino acids increased with inclusion of single-cell protein. As the single-cell protein inclusion increased, the levels of polyunsaturated fatty acids, such as C18:2n-6, C20:2n-6, C20:4n-6 and C20:5n-3 also increased, especially C20:4n-6 and C20:5n-3. Similar to the control, the replacement with single-cell protein did not have adverse effects on the activities of pepsin, trypsin, and lipase. In conclusion, single-cell protein has positive impacts on the growth, feed conversion rate, the biochemical composition of <em>S. monotuberculatus</em> and its immune capacity, which indicates that the single-cell protein has the potential to replace fishmeal as a new effective protein for sea cucumber. We concluded that this SCP can be as a sustainable substitute, capable of replacing 15 % of protein in the diet of juvenile sea cucumber, positively promoting their performance.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"42 ","pages":"Article 102795"},"PeriodicalIF":3.2,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143821147","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}

引用次数: 0

Evaluation of the enzymatic hydrolysis of sargassum mixed with fish protein hydrolysis product as an alternative protein source in shrimp feed, from the perspectives of growth performance, amino acid composition, antioxidant capacity and endoplasmic reticulum stress

IF 3.2 2区农林科学 Q1 FISHERIES

Aquaculture Reports

Pub Date : 2025-04-12 DOI: 10.1016/j.aqrep.2025.102813

Congcong Wang, Songming Chen, Jieyu Dai, Qiang Chen, Jinqi Xu, Yi Luo, Fen Dong, Jiteng Wang, Tao Han

A study was conducted to evaluate the effect of enzymatic hydrolysis of sargassum mixed with fish protein hydrolysis product (named “SFPH” in the present study) as a substitute for fish meal in shrimp feed. Six isonitrogenous and isolipidic diets (SFPH was used to replace 0 %, 5 %, 10 %, 20 %, 30 % and 40 % of fish meal protein) were administered to Litopenaeus vannamei (initial body weight: 0.9 g) for 8 weeks. Results showed that SFPH can replace 30 % of fish meal without affecting the growth performance of shrimp. However, 40 % of SFPH substitution significantly inhibited the weight gain rate (WGR) and specific growth rate (SGR) of shrimp. SFPH substitution had little effect on the composition of fatty acids, but SFPH substitution significantly reduced the contents of histidine, phenylalanine, tyrosine and taurine in the whole shrimp body. SFPH improved the structure of shrimp hepatopancreas and muscle when no more than 20 % of the fish meal was replaced. However, 40 %SFPH substitution significantly disrupted the structure of hepatopancreas and muscle. SFPH substitution significantly affected the antioxidant capacity, as manifested by a gradual decrease in T-AOC activity. With respect to endoplasmic reticulum stress, 30 %SFPH and 40 %SFPH groups significantly increased the mRNA expression of eif2α and bip. In summary, SFPH can replace 30 % of fish meal protein in shrimp feed without affecting shrimp growth. However, when SFPH exceeds 30 %, it can easily induce oxidative stress and endoplasmic reticulum stress in the hepatopancreas.

{"title":"Evaluation of the enzymatic hydrolysis of sargassum mixed with fish protein hydrolysis product as an alternative protein source in shrimp feed, from the perspectives of growth performance, amino acid composition, antioxidant capacity and endoplasmic reticulum stress","authors":"Congcong Wang, Songming Chen, Jieyu Dai, Qiang Chen, Jinqi Xu, Yi Luo, Fen Dong, Jiteng Wang, Tao Han","doi":"10.1016/j.aqrep.2025.102813","DOIUrl":"10.1016/j.aqrep.2025.102813","url":null,"abstract":"<div><div>A study was conducted to evaluate the effect of enzymatic hydrolysis of sargassum mixed with fish protein hydrolysis product (named “SFPH” in the present study) as a substitute for fish meal in shrimp feed. Six isonitrogenous and isolipidic diets (SFPH was used to replace 0 %, 5 %, 10 %, 20 %, 30 % and 40 % of fish meal protein) were administered to <em>Litopenaeus vannamei</em> (initial body weight: 0.9 g) for 8 weeks. Results showed that SFPH can replace 30 % of fish meal without affecting the growth performance of shrimp. However, 40 % of SFPH substitution significantly inhibited the weight gain rate (WGR) and specific growth rate (SGR) of shrimp. SFPH substitution had little effect on the composition of fatty acids, but SFPH substitution significantly reduced the contents of histidine, phenylalanine, tyrosine and taurine in the whole shrimp body. SFPH improved the structure of shrimp hepatopancreas and muscle when no more than 20 % of the fish meal was replaced. However, 40 %SFPH substitution significantly disrupted the structure of hepatopancreas and muscle. SFPH substitution significantly affected the antioxidant capacity, as manifested by a gradual decrease in T-AOC activity. With respect to endoplasmic reticulum stress, 30 %SFPH and 40 %SFPH groups significantly increased the mRNA expression of <em>eif2α</em> and <em>bip</em>. In summary, SFPH can replace 30 % of fish meal protein in shrimp feed without affecting shrimp growth. However, when SFPH exceeds 30 %, it can easily induce oxidative stress and endoplasmic reticulum stress in the hepatopancreas.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"42 ","pages":"Article 102813"},"PeriodicalIF":3.2,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143821310","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}

引用次数: 0