Journal of The World Aquaculture Society最新文献

{"title":"Valorization of corn husk waste: Xylooligosaccharides as a sustainable prebiotic enhance growth, gut health, and fillet quality in Nile tilapia (Oreochromis niloticus)","authors":"Jesca Chikwiramakomo,&nbsp;Claudious Gufe,&nbsp;Tawanda Ashley Chari,&nbsp;Prosper Jambwa,&nbsp;Vimbai R. Hamandishe","doi":"10.1111/jwas.70087","DOIUrl":"https://doi.org/10.1111/jwas.70087","url":null,"abstract":"<p>Xylooligosaccharides (XOS) are advantageous prebiotics that promote sustainable aquaculture. The growth performance, gut microbiota, and fillet composition of juvenile Nile tilapia (<i>Oreochromis niloticus</i>) were investigated in relation to the prebiotic effects of corn husk-derived XOS, extracted using alkaline extraction and autohydrolysis. Following 2 weeks of acclimatization, 270 fish were split into three groups: control, 0.5% XOS, and 1% XOS, with three replicates per group. For 56 days, fish were fed twice a day. Final weight (83.9 g in 1% XOS vs. 44.5 g in control, <i>p</i> &lt; 0.001, Cohen's <i>d</i> = 2.1) and survival rate (94% in 1% XOS vs. 70% in control, <i>p</i> &lt; 0.001) were both considerably increased by XOS supplementation. The feed conversion ratio dropped significantly from 2.69 (control) to 0.99 (1% XOS, <i>p</i> = 0.003). The nutritional quality of the fillet increased, with calcium levels more than doubling (2.6%–6.7%, <i>p</i> &lt; 0.001) and protein content increasing by 35.6% (14.9% in control to 20.2% in 1% XOS, <i>p</i> &lt; 0.001). A 36-fold increase in lactic acid bacteria (833 CFU/g in 1% XOS vs. 23 CFU/g in the control group, <i>p</i> &lt; 0.05) and a decrease in coliforms were observed in the gut microbiota study, suggesting improved gut health. These results demonstrate that XOS derived from corn husks can serve as a sustainable feed additive improving fillet quality, shaping a favorable gut microbiota, enhancing fish development, and providing a viable substitute for antibiotic growth promoters in aquaculture.</p>","PeriodicalId":17284,"journal":{"name":"Journal of The World Aquaculture Society","volume":"57 2","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jwas.70087","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147686719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Probiotic Bacillus subtilis enhances production efficiency in biofloc-raised Cherax quadricarinatus via microbiome remodeling and host antioxidant capacity upregulation","authors":"Chengxu Ruan,&nbsp;Junhao Tang,&nbsp;Jiaohong Wang,&nbsp;Ye Tao","doi":"10.1111/jwas.70089","DOIUrl":"https://doi.org/10.1111/jwas.70089","url":null,"abstract":"<p>Biofloc technology (BFT) presents a sustainable approach to aquaculture intensification by recycling nutrients and reducing water exchange. However, probiotic supplementation for optimization in emerging species such as redclaw crayfish (<i>Cherax quadricarinatus</i>) remains unexplored. This study investigated how <i>Bacillus subtilis</i> (<i>B. subtilis</i>) probiotic supplementation enhances BFT performance in a 70-day redclaw crayfish culture trial. Two treatments—biofloc control (B) and biofloc + <i>B. subtilis</i> (BP)—were evaluated in quintuplicate (<i>n</i> = 5), with systematic monitoring of water quality, biofloc dynamics, crayfish growth, digestive/antioxidant enzymes, and microbiome shifts using 16S rRNA sequencing and PICRUSt2 functional prediction. Probiotic amendment significantly boosted floc aggregation (TSS +40%, BFV +39%) and stabilized carbon-to-nitrogen ratios despite causing a transient elevation in nitrite. Microbial analysis revealed significant pathogen suppression (<i>Vibrio</i> −50%, <i>Aeromonas</i> −61%) alongside enriched nitrifying taxa (<i>Nitrosomonas</i> + 47%) and denitrifying taxa (<i>Thauera</i> + 157%), with increased predicted functional diversity and inferred upregulation of key pathways. Crucially, crayfish in BP exhibited elevated digestive enzymes (α-amylase, pepsin, lipase), antioxidant capacity (SOD, CAT, T-AOC), and immune enzyme activity (AKP). These physiological enhancements, coupled with improved system stability, collectively were associated with a 15.8% increase in production yield, survival (13.9%), and a 12.7% lower feed conversion ratio (FCR). These results demonstrate that <i>B. subtilis</i> effectively optimizes BFT systems by concurrently modulating microbial ecology and host physiology, offering a practical strategy to advance sustainable redclaw crayfish aquaculture.</p>","PeriodicalId":17284,"journal":{"name":"Journal of The World Aquaculture Society","volume":"57 2","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jwas.70089","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147686768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of the gut microbiome community, abundance, and functions of Procambarus clarkii under different aquaculture conditions","authors":"Hucheng Jiang,&nbsp;Yu Wang,&nbsp;Nuo Zhang,&nbsp;Yanhua Zhao,&nbsp;Yanming Sui,&nbsp;Hui Xue","doi":"10.1111/jwas.70088","DOIUrl":"https://doi.org/10.1111/jwas.70088","url":null,"abstract":"<p>To examine the gut microbial composition and functional attributes of red swamp crayfish (<i>Procambarus clarkii</i>) across different rearing environments, this experiment employed high-throughput sequencing of the 16S rRNA gene of bacterial DNA isolated from the gut. Using an intensive monoculture system in ponds (NP) as the control, this research analyzed and compared the gut microbial communities of crayfish reared in integrated frameworks, including lotus and crayfish co-culture (XH), rice and crayfish co-culture (YZ), as well as polyculture systems involving crayfish and crabs (NG). The findings indicated that when examining phylum-level taxonomy, the bacterial community structures in the gut remained relatively similar across the various cultivation modes; the most abundant phyla identified were Bacteroidetes, Proteobacteria, and Firmicutes. In terms of genus-level classification, <i>Bacteroides</i> and <i>Citrobacter</i> were identified as the dominant taxa. Correspondingly, when analyzed at the species level, <i>Bacteroides neonati</i> and <i>Citrobacter freundii</i> emerged as the most prevalent species. Significant differences in microbial diversity were observed among the farming systems. Compared with the intensive monoculture group, the lotus-crayfish and rice-crayfish systems showed higher gut microbial diversity, whereas the crayfish-crab polyculture system exhibited lower diversity. Predictive functional analysis indicated that the dominant metabolic functions across all four systems were chemoheterotrophy, fermentation, and aerobic chemoheterotrophy. The genus-level interaction network showed that the microbial network in the NG group had a relatively simple structure, while those in the XH and YZ groups displayed a more complex microbial structure. In summary, the gut microbial community of red swamp crayfish features a core profile primarily composed of Bacteroidetes, Proteobacteria, and Firmicutes, while its taxonomic diversity exhibits considerable variation across different rearing systems. These results deepen the comprehension of microbial ecology within the digestive tract of this species and offer important implications for the improvement of sustainable aquaculture strategies.</p>","PeriodicalId":17284,"journal":{"name":"Journal of The World Aquaculture Society","volume":"57 2","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jwas.70088","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147686287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimal dietary protein level for juvenile Hefang crucian carp (Carassius auratus): Balancing growth performance and hepatic health","authors":"Jie Zhang,&nbsp;Dongyi Zhang,&nbsp;Yin Huang,&nbsp;Yangbo Xiao,&nbsp;Shiyu Tu,&nbsp;Shengfeng Huang,&nbsp;Fufa Qu,&nbsp;Zhen Liu,&nbsp;Shaochun Liu,&nbsp;Jianzhou Tang,&nbsp;Changjun Liu,&nbsp;Shenping Cao","doi":"10.1111/jwas.70081","DOIUrl":"https://doi.org/10.1111/jwas.70081","url":null,"abstract":"<p>A 54-day feeding trial was conducted to investigate the effects of dietary protein levels on growth performance, digestive capacity, plasma biochemical indexes, and gene expression in Hefang crucian carp (<i>Carassius auratus</i>). Six experimental diets were prepared with protein levels of 21.7%, 24.0%, 29.4%, 34.0%, 38.0%, and 43.2%, respectively. Each diet treatment was randomly assigned to triplicate groups of 25 fish, with an initial body weight of (14.60 ± 0.39) g per tank. Fish were fed twice daily to apparent satiation. The results showed that weight gain rate (WGR) and specific growth rate (SGR) exhibited an upward trend with increasing dietary protein levels, and reached the highest value in the 43.2% protein group. Conversely, protein efficiency was significantly higher in the 24.0% protein group compared to the other protein groups (<i>p</i> &lt; 0.05). As dietary protein levels increased, there was a significant rise in the condition factor (CF), while both the hepatopancreas somatic index (HSI), viscerosomatic index (VSI) and crude lipid of whole body experienced significant decreases (<i>p</i> &lt; 0.05). The intestinal trypsin activity was significantly elevated in the high-protein groups (38.0% and 43.2% protein) compared to the low-protein group (21.7% protein), whereas the plasma triglyceride concentrations exhibited a significant inverse relationship (<i>p</i> &lt; 0.05). However, at a dietary protein level of 43.2%, the lipid droplet content in the liver of Hefang crucian carp was significantly elevated compared to other experimental groups. Additionally, the group fed the diet with a protein level of 21.7% exhibited significantly higher lipid droplet content than the groups with protein levels of 24.0% and 34.0%. A curvilinear regression analysis indicated that the lipid droplet area in the liver was minimized at a dietary protein concentration of 29.9%. Regarding intestinal gene expression, the <i>asct2</i> and <i>lat2</i> genes exhibited the highest expression levels in the group supplemented with 43.2% protein. Conversely, the expression levels of <i>pept1</i> and <i>cdx2</i> genes initially decreased and subsequently increased as the dietary protein levels rose, achieving their peak in the low-protein groups (21.7% and 24.0% protein) (<i>p</i> &lt; 0.05). Concerning hepatopancreas genes, the expression levels of <i>tor</i>, <i>igf1</i>, and <i>gh</i> genes were significantly elevated in the 24.0% protein group compared to other treatment groups. Additionally, the expression levels of <i>ghr</i> were significantly higher in the 21.7% and 43.2% protein groups compared to the other treatment groups (<i>p</i> &lt; 0.05). In conclusion, Hefang crucian carp exhibited optimal growth performance at a dietary protein level of 43.2%, whereas a protein concentration of 29.9% was identified as the critical threshold for maintaining optimal liver health.</p>","PeriodicalId":17284,"journal":{"name":"Journal of The World Aquaculture Society","volume":"57 2","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jwas.70081","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147615166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization of NLRP3 isoforms in bullfrog Aquarana catesbeiana and their role in antibacterial immunity","authors":"Peikui Yang,&nbsp;Jiayi Chen,&nbsp;Yixian Lin,&nbsp;Boxi Zeng,&nbsp;Tongying Chen,&nbsp;Jude Juventus Aweya,&nbsp;Xianghui Zou,&nbsp;Yuzhong Zheng,&nbsp;Ruixuan Wang","doi":"10.1111/jwas.70085","DOIUrl":"https://doi.org/10.1111/jwas.70085","url":null,"abstract":"<p>The NLRP3 inflammasome is essential for innate immunity against pathogens, yet its function in amphibians remains poorly understood. Here, we identified and cloned two novel isoforms of NLRP3 from the American bullfrog (<i>Aquarana catesbeiana</i>), designated <i>Ac</i>NLRP3 X1 and <i>Ac</i>NLRP3 X2, with open reading frames of 2397 bp (798 aa) and 2874 bp (957 aa), respectively. Both isoforms contain conserved NACHT and LRR domains, lack a typical PYD domain, and share high structural similarity to other amphibians' NLRP3 homologs. Tissue distribution analysis revealed that both isoforms are broadly expressed in immune-related organs and are significantly upregulated upon infection with <i>Citrobacter freundii</i>, <i>Elizabethkingia miricola</i>, <i>Aeromonas hydrophila</i>, and <i>Edwardsiella tarda</i>. In vivo knockdown of either isoform significantly reduced the transcript levels of downstream inflammasome-related genes, including <i>Ac</i>ASC, <i>Ac</i>Caspase1, <i>Ac</i>IL-1β, and <i>Ac</i>IL-18. Collectively, these findings demonstrate that both <i>Ac</i>NLRP3 isoforms contribute to antibacterial immunity by regulating inflammasome signaling, providing insight into amphibian innate immunity and expanding understanding of NLRP3 function across vertebrates.</p>","PeriodicalId":17284,"journal":{"name":"Journal of The World Aquaculture Society","volume":"57 2","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jwas.70085","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147566464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Temperature and nutrient responses of three red algae: Implications for species rotation in land-based aquaculture","authors":"SookKyung Shin,&nbsp;Young-Seok Han,&nbsp;Charles Yarish,&nbsp;Jang K. Kim","doi":"10.1111/jwas.70083","DOIUrl":"https://doi.org/10.1111/jwas.70083","url":null,"abstract":"<p>Land-based Integrated Multi-Trophic Aquaculture (IMTA) offers a sustainable production model, but its economic viability is often limited by seasonal fluctuations in temperature and nutrient loads, which hinder consistent year-round biomass production. To address this bottleneck, we evaluated the potential for a seasonal species rotation strategy by comparing the physiological performance of three economically important red seaweeds. <i>Pyropia yezoensis</i>, <i>Chondrus ocellatus</i>, and <i>Gracilaria vermiculophylla</i> were cultivated under a factorial matrix of three temperatures (10°C, 15°C, and 20°C) and two nutrient concentrations (HN: 500 μM of nitrogen and 30 μM of phosphorus; LN: 50 μM of nitrogen and 3 μM of phosphorus). Results showed distinct thermal niches: <i>Py. yezoensis</i> performed optimally in colder conditions (10°C–15°C), exhibiting severe stress at 20°C. In contrast, <i>G. vermiculophylla</i> was highly tolerant to warmer temperatures, maintaining high growth and nutrient assimilation at 20°C. <i>C. ocellatus</i> demonstrated an intermediate preference, with peak performance at 15°C but showing signs of bleaching at 20°C. These findings provide the scientific basis for a dynamic operational framework: cultivating <i>Py. yezoensis</i> in winter (≤15°C), transitioning to <i>C. ocellatus</i> in spring/autumn (15°C–20°C), and employing the robust <i>G. vermiculophylla</i> in summer (≥20°C). This proposed rotation strategy offers a practical pathway to enhance the stability, productivity, and environmental sustainability of land-based IMTA systems.</p>","PeriodicalId":17284,"journal":{"name":"Journal of The World Aquaculture Society","volume":"57 2","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jwas.70083","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147637059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Using computer vision to assess changes in ventilation rates of farmed Atlantic salmon (Salmo salar) following a freshwater bath","authors":"Quynh Le Khanh Vo,&nbsp;Kylie A. Pitt,&nbsp;Bela Stantic,&nbsp;Colin Johnston,&nbsp;Blair Kennedy,&nbsp;Lukas Folkman","doi":"10.1111/jwas.70084","DOIUrl":"https://doi.org/10.1111/jwas.70084","url":null,"abstract":"<p>Computer vision is becoming a valuable tool for non-invasive, continuous monitoring of farmed fish health and welfare, reducing the reliance on manual inspections. Field validation is needed to interpret computer vision outputs and assess their use in aquaculture. Freshwater baths, routinely applied to manage amoebic gill disease (AGD) in farmed Atlantic salmon (<i>Salmo salar</i>), improve gill health by reducing gill mucus. In this study, we aimed to determine whether a computer vision method could detect treatment-related changes in ventilation after freshwater treatment. The method detected fish heads and classified mouth states (open or closed) using a convolutional neural network, followed by a tracking-by-detection approach to calculate mouth movement durations and estimate ventilation rates. Ventilation rates were calculated from 47 pairs of videos filmed before and after fish were bathed in freshwater at commercial farms in Tasmania, Australia. Additional data on water temperature and dissolved oxygen levels were recorded at the pens. A multiple linear mixed-effects model was used to analyze associations between these variables. On average, median ventilation rates decreased by 2.56 open-closed mouth cycles per minute after the baths. Our results contribute to understanding how computer vision could support the assessment of fish responses to freshwater treatment, which is commonly used to manage gill health issues such as AGD.</p>","PeriodicalId":17284,"journal":{"name":"Journal of The World Aquaculture Society","volume":"57 2","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jwas.70084","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147637043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative analysis of morphology, growth performance and gonadal development between the hybrid crab (Scylla serrata ♀ × S. paramamosian ♂) and S. serrata","authors":"Huanyu Zhang,&nbsp;Bihui Chao,&nbsp;Wenxiao Cui,&nbsp;Shaopan Ye,&nbsp;Shihao Shi,&nbsp;Peixun Chen,&nbsp;Mhd Ikhwanuddin,&nbsp;Hongyu Ma","doi":"10.1111/jwas.70079","DOIUrl":"https://doi.org/10.1111/jwas.70079","url":null,"abstract":"<p>Interspecific hybridization, through integrating genetic resources across distinct species, serves as a pivotal strategy for improving yield, stress resistance, and quality in aquacultural species. To evaluate the performance of hybrid crab (<i>Scylla serrata</i> ♀ × <i>S. paramamosain</i> ♂), this study systematically compared morphological traits, growth performance, and gonadal development between the hybrid crab (<i>S. serrata</i> ♀ × <i>S. paramamosain</i> ♂) and its maternal parent <i>S. serrata</i>. The results show that the hybrids exhibit morphological traits similar to <i>S. serrata</i>, including high, blunt frontal lobe spines, contrasting with the moderately tall, sharply pointed spines of <i>S. paramamosain</i>. However, morphological differences also exist between hybrid crab and <i>S. serrata</i>, primarily reflected in the internal carpal spine (ICS). At the 2 months (M2) and 3 months (M3) stages, the ICS degeneration rates in hybrids (36.36% and 35.56%, respectively) exceeded those in <i>S. serrata</i> (13.85% and 17.65%). As the cultivation progressed, the number of significant differences in the 27 morphological ratios between the hybrid crab and <i>S. serrata</i> gradually decreased, from 15 in the M2 stage to 8 in the M4 stage. The hybrid crab exhibited superior weight gain rate (142.98%) from M2 to M3 stage compared with <i>S. serrata</i> (112.42%). However, the growth advantage of the hybrids decreased during the M3–M4 period, and their advantage at the M4 stage was mainly reflected in the total edible yield. The hybrid crab can produce germ cells; however, its overall gonadal development remains limited. Further studies are needed to determine whether the hybrids are capable of successful mating and whether their ovaries can develop normally after mating. This study provided new insights into the hybrid mud crab that would be beneficial for the aquaculture industry.</p>","PeriodicalId":17284,"journal":{"name":"Journal of The World Aquaculture Society","volume":"57 2","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jwas.70079","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147626359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dietary supplementation with ALLPRO, a DHA source, for Nile tilapia reared under field conditions throughout cold season: Effects on growth performance, carcass and fillet quality, and economic feasibility","authors":"Vitor Mendes Lehmkuhl,&nbsp;Renata Oselame Nobrega,&nbsp;Débora Machado Fracalossi,&nbsp;James Eugene Pettigrew,&nbsp;Philip Lyons,&nbsp;Bruno Corrêa da Silva,&nbsp;Delano Dias Schleder","doi":"10.1111/jwas.70076","DOIUrl":"https://doi.org/10.1111/jwas.70076","url":null,"abstract":"<p>This study evaluated the effects of dietary supplementation with ALLPRO, a source of docosahexaenoic acid (DHA—C22:6n-3, 126 g kg⁻¹ dry weight) and nucleotides (5 g kg⁻¹ dry weight), on Nile tilapia farmed in southern Brazil during autumn, winter, and spring. Two isoenergetic diets were tested: one supplemented with 1.7 g ALLPRO 100 g⁻¹ of diet (dry weight), based on prior studies performed under lab conditions, and a control diet without n-3 polyunsaturated fatty acids (PUFAs). Juvenile tilapia (16.09 ± 0.13 g) were stocked at 45 fish m⁻³ in 12 net cages (1.6 m³) placed in a pond. A completely randomized design with six replicates per treatment was used. Feeding rate and frequency were adjusted based on fish biomass and water temperature using Epagri/SC feeding tables. The trial lasted 245 days, and the parameters evaluated included growth performance, yield (fillet and carcass), proximate composition, fillet fatty acid profile, and economic feasibility. Fish fed the ALLPRO diet showed improved feed conversion, highest daily weight gain, increased protein utilization, greater yield, and elevated crude protein and n-3 PUFA levels, especially DHA, in fillets. Supplementation with 0.22 g of DHA 100 g⁻¹ of diet dry weight resulted in a 10% higher final weight compared to fish fed the control diet without DHA supplementation. Although the inclusion of the additive increased the diet cost, the average production cost per whole fish and fillet was more economically efficient. In conclusion, ALLPRO supplementation enhanced growth, nutritional quality, and economic feasibility in Nile tilapia farming under suboptimal temperatures in field conditions.</p>","PeriodicalId":17284,"journal":{"name":"Journal of The World Aquaculture Society","volume":"57 2","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jwas.70076","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147626358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Utilizing a consumer taste panel to assess the geosmin sensory detection threshold in market-size Atlantic salmon, Salmo salar, produced in land-based aquaculture systems","authors":"John Davidson,&nbsp;Curtis Crouse,&nbsp;Travis May,&nbsp;Ran Tao,&nbsp;Ashley M. Soldavini","doi":"10.1111/jwas.70080","DOIUrl":"https://doi.org/10.1111/jwas.70080","url":null,"abstract":"<p>Microbially derived geosmin causes an earthy off-flavor in Atlantic salmon, <i>Salmo salar</i>, produced in land-based systems, placing these products at risk for rejection. Therefore, a study was conducted to investigate the geosmin sensory threshold in market-size Atlantic salmon. When natural waterborne geosmin levels peaked in a partial reuse system, some fish were moved to depuration tanks, while others remained in water containing 12–25 ng/L geosmin. This approach yielded five groups of fish with average geosmin levels of 87 (Control), 181, 282, 366, and 482 ng/kg. Three microwaved fillet samples, two Controls, and one from another category, were blindly presented to 85 self-identified salmon consumers across four triads with ascending geosmin concentrations. Panelists were asked to identify the different sample in each triad. This Ascending Concentration Series Method of Limits test determined that the best-estimate geosmin threshold of all panelists was 381 ± 153 ng/kg. Only 44% of participants accurately detected geosmin within the tested range. However, 13% identified all samples correctly, demonstrating that highly sensitive consumers can detect a difference between salmon fillets with 87 and 181 ng/kg geosmin. These findings inform risk management decisions surrounding the detection of off-flavor in Atlantic salmon harvested from land-based aquaculture systems.</p>","PeriodicalId":17284,"journal":{"name":"Journal of The World Aquaculture Society","volume":"57 2","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jwas.70080","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147637030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}