Journal of the World Aquaculture Society

To improve the growth of genetically improved farmed tilapia (GIFT), the supplementation of Schizochytrium limacinum and Lactococcus lactis was sequentially optimized by a single‐factor method and central composite design combined with response surface methodology (CCD‐RSM) using a developed desirability function (Df) as the response value. The optimum supplementary prescriptions obtained by the single‐factor method and CCD‐RSM were alone 1.5% S. limacinum, alone 1 × 10⁷ CFU/g L. lactis, and 1.22% S. limacinum + 4.01 × 10⁷ CFU/g L. lactis respectively. The Df of the tilapia fed with the diets supplemented with these optimum prescriptions were 0.53, 0.54, and 0.61, respectively. The Df, weight gain rate (WGR), and feed conversion rate (FCR) of the tilapia fed with the optimum prescriptions obtained by CCD‐RSM were significantly higher than those of the tilapia fed with the diets obtained by single‐factor experiments and the basic diet for 28 days. Furthermore, the results of CCD‐RSM can show that there were significant interactive effects between S. limacinum and L. lactis on trypsin, α‐amylase, lipase, total cholesterol (TC)⁻¹ and low‐density lipoprotein cholesterol (LDL‐C)⁻¹, and Df, but those of single‐factor method cannot.

The use of processing by‐products may reduce pressure on fish stocks as well as diminish wastes and negative environmental impact. Different studies investigated fish by‐products used as alternative nutritional source to conventional feedstuffs. Fish protein hydrolysates (FPH), as a protein source derived from discards of rainbow trout processing, were included in feeds and effects were evaluated on productive performances, liver status, and body composition in gilthead sea bream, Sparus aurata L., juveniles. Three groups of 170 juveniles each (initial weight 37.8 ± 0.5 g), in triplicate indoor tanks of 2 m³ volume each, were fed including FPH in L1 (7.5 g/kg) and L2 (15 g/kg) feeds in replacement of fishmeal. LC diet was used as control having fish meal and soybean meal as main protein sources. At the end of the trial (85 days), satisfactory productive performances were obtained in all the groups with similar performances. The final mean weight ranged from 76.6 to 78.0 g. The two FPH diets exhibited high palatability equal to LC. Liver histology did not differ although fat accumulation was detected in all fish. Body composition and fatty acids were similar. FPH as substitute of protein source is suitable in the feeding of gilthead sea bream juveniles.

Toll‐like receptor (TLR) is one of the most important pattern recognition receptors in both invertebrate and vertebrate animals. In previous study, three different kinds of TLR cDNAs (PtToll1‐3) have been cloned from Portunus trituberculatus. In this study, a novel PtToll4 cDNA sequence was identified in this crab. The PtToll4 ORF is predicted to encode 894 peptides with an initiating signal peptide, an extracellular LRRs domain, a transmembrane region, and an intracellular toll‐interleukin‐1 receptor domain. Based on the sequence and phylogenetic analysis, PtToll4 distinctly clustered with almost all crustacean tolls, which mostly clustered with some shrimp TLRs and Eriocheir sinensis Toll 2 (EsToll 2). The real‐time quantitative polymerase chain reaction analysis showed that the transcript of PtToll4 was constitutively expressed in tissues. In hemocytes, the transcript of PtToll4 in large granulocytes is approximately threefold higher than in small granulocytes and hyalocytes. Moreover, the expression of PtToll4 could be moderately and shortly upregulated by Vibrio alginolyticus or lipopolysaccharide challenge in the primary cultured hemocytes. In HEK 293T cell model, over‐expressed PtToll4 was not able to activate the mammal NF‐κB, compared with a positive plasmid. In the Drosophila S2 cell model, over‐expressed PtToll4 distributed mainly in cell membrane and could affect the activation of some Drosophila antimicrobial peptides promoters. The RNA interference experiment showed that the expressions of PtToll4 was significantly inhibited by its specific double‐stranded RNA in the crab hemocytes and accompanied by the suppressed expressions of the anti‐lipopolysaccharide factor 4 (ALF4), ALF7, hyastatin3, crustin1, and crustin3.

Because traditional barring facilities have difficulty in controlling the water surface and have low intelligence degree, a new type of intelligent electronic pulse barring facility was developed. The system established a dynamic charging and discharging model, an electric field strength calculation model, and a forward reverse rotation conduction model. The facility used a controller area network field bus to realize cooperative operation between one master machine and multiple slave machines that was suitable for fish blocking in various water areas. By using insulated gate bipolar transistors instead of thyristors, the electrode adopted an instantaneous rotational conduction mechanism that was efficient, safe, reliable, and resulted in low noise pollution. The system realized the application of the Internet of Things and an automatic fault phone alarm function in the aquaculture industry such that users could use phones or computers for real‐time remote monitoring. A failure of the fish barring facility would immediately trigger an alarm, such that corresponding measures could be taken to avoid the escape of many fish and complete the unattended aquaculture industry. After multiple freshwater fish arresting tests, the load capacity of the whole machine was 0.5 Ω, and the power consumption was 0.3–2 kW; this could save 65% more electricity than traditional thyristors and had a maximum interception area of 1200 m². This has significant practical application value in improving the digitalization, automation, and intelligence level of the aquaculture industry.

This article aims to shed light on the recent sustainable transformation dynamics of the Norwegian aquaculture industry. Drawing on perspectives from the socio‐technical transition studies this article investigates how this process has been shaped by a specific policy instrument known as development licenses (DL) launched in 2015. The article captures the DL as a transformative innovation policy instrument and shows how this has played a key role in steering the directionality of the technological innovations in the sector to instigate the sustainable transformation process of the industry. The article reveals that the DL has prompted the emergence of new challenged‐oriented innovation systems through reorientation and reconfiguration processes. These processes specifically involved both the mobilization of actor‐networks in the industry, including a functional reorientation by the key regulatory organ—the Directorate of Fisheries—and harnessing locally available pre‐existing knowledge and skills—particularly in the Petro‐maritime industry. The licensing scheme means that the industry is currently in the process of transition to becoming a sector based on multiple aquaculture production technologies. However, we suggest that addressing the long‐term sustainable transformation imperatives of the sector will largely depend upon the ability to identify and support further development of promising niche aquaculture technologies.

Multiple‐batch production is the most common farming strategy for raising channel catfish. Increased adoption of intensified alternative production practices has changed the cost structure of many catfish production practices including multiple‐batch systems. Production efficiency in multiple‐batch production can be enhanced by providing optimal stocking recommendations for fingerlings and carryover fish. Twelve 0.4‐ha ponds were understocked with 20,782 channel catfish fingerlings (mean weight = 30 g/fish) at three different carryover biomass rates (3440; 4580; and 5702 kg/ha). Fish were fed once daily to apparent satiation with a 28% protein floating feed, and ponds were aerated with a 7.4‐kW electric paddlewheel aerator. Gross, net, daily net yields, sub‐marketable yields (<0.54 kg), growth (g/day), and survival were statistically similar among the three treatments, but yield of marketable fish yield (fish ≥0.54 kg) increased significantly with increased carryover biomass. The cost of production was reduced while net returns increased with increased carryover biomass. The lowest carryover biomass treatment (3440 kg/ha) had negative cash flow and net returns when sub‐marketable fish were not assigned value. However, all three carryover biomass treatments attained positive annual net cash flows and net returns when sub‐marketable fish were valued as revenue, the two higher carryover biomass treatments (4580 and 5702 kg/ha) outperformed the low carryover biomass treatment (3440 kg/ha). This study indicates channel catfish carryover biomass rates should be between 4580 and 5702 kg/ha to improve cost efficiency in intensively aerated, multiple‐batch production systems.

Compared with common abalone, the orange‐muscle abalone (Haliotis gigantea) has an enhanced ability to accumulate carotenoids. Feeding on asparagus (Gracilaria lemaneiformis) was critical for maintaining carotenoid contents in H. gigantea muscles. However, whether intestinal microbes play the role in carotenoid accumulation in different colored abalone, and the effects of different diets on intestinal microbes in abalone are unknown. In the study, the differences in intestinal microbiota between abalone with different colors and the effects of different diets on the intestinal microbiota of the abalone were analyzed. The results showed that (1) there was no significant difference in intestinal microbial community composition between the orange‐muscle abalone and the common abalone, and (2) the intestinal microbial community composition of abalone fed on asparagus was significantly different from that of abalone fed on kelp (Laminaria japonica). At the genus level, the relative abundance of Psychrilyobacter in the intestinal tract of abalone fed with asparagus was significantly higher than that of kelp‐fed groups. Stenotrophomonas and Vibrio were the dominant bacteria at the genus level in abalone fed with the kelp. This result excluded the role of intestinal microbes in different colored abalone and provided clues for further study of the coloration mechanism of abalone.

The early life stages of fish are critical for determining the overall productivity and sustainability of aquaculture operations. This study investigated the effects of dietary autolyzed brewer's yeast (ABY) on the growth performance and intestinal health of Nile tilapia fry (Oreochromis niloticus). A 35‐day feeding trial with 480 Nile tilapia fry across 12 experimental tanks tested the effects of diets supplemented with 1, 2, and 4 g/kg of ABY, with a control diet for comparison. The results indicated that the diet which had 1 g/kg ABY supplementation (ABY1) significantly enhanced the weight gain and specific growth rate (SGR) while reducing feed conversion ratio (FCR) compared to the control diet. Intestinal gene expression analysis showed significant upregulation of immunoregulatory genes (tlr2, il10, il1β, and igm), and a tight junction gene (occludin) in the ABY1 group. Conversely, tnfα expression was significantly downregulated in the ABY1 and ABY2 groups, indicating a potential anti‐inflammatory effect. Histological analysis of the mid‐intestine revealed healthy morphology with no significant differences in mucosal fold length, muscularis thickness, lamina propria width, and goblet cell count among the treatment groups. The findings demonstrate that supplementing diets with ABY at 1 g/kg level enhances growth performance and modulates the intestinal immune response of Nile tilapia fry, without compromising intestinal integrity. This study offers valuable insights into using ABY as a functional feed additive to enhance Nile tilapia health and development, as well as to promote aquaculture sustainability.

Despite catfish being the dominant freshwater aquaculture product in the United States, catfish texture and sensory evaluation are understudied compared with other aquaculture species, and very few studies have been conducted to evaluate these traits in catfish. Texture, sensory, carcass yield, flavor, visceral fat deposition, gonadal development, and fillet color analyses were conducted on four size classes, small (<0.68 kg), medium (0.68–0.92 kg), large (0.93–1.75 kg), and extra‐large (>1.75 kg), for channel catfish (n = 456) (Ictalurus punctatus), blue catfish (n = 78) (I. furcatus), and hybrid catfish (n = 195) (channel catfish ♀ × blue catfish ♂). Within genetic type comparisons indicated that the texture traits, hardness, and chewiness and the sensory trait toughness increased with increasing size in hybrid catfish and channel catfish but were the most pronounced in channel catfish. Overall, channel catfish had the firmest fillets based on several attributes. Blue catfish were found to have differences among texture traits between the extra‐large size class and the three remaining size classes, but overall size had less of an effect compared with the channel catfish and hybrid catfish. A trend of paternal predominance was observed as the hybrid catfish was more similar to the blue catfish than the channel catfish. Hybrid catfish had the highest fillet percentage. This study is the first large‐scale analysis of texture and sensory traits within two catfish species and their interspecific hybrid at different sizes and highlights the differences in commercially important texture and sensory traits.

Polyphenol‐rich sugarcane extract (PRSE) is a product of sugarcane obtained from the sugar refinery industry and can potentially be used as a feed additive in farmed animals. The purposes of the current study were to evaluate the effects of PRSE on growth performance, survival, immune responses, and resistance to Vibrio parahaemolyticus and white spot syndrome virus (WSSV) infections of Pacific white shrimp, (Litopenaeus vannamei). In Experiment 1, the postlarvae were randomly divided into five groups (8 replicates/group and 80 shrimp/tank) and fed commercial feeds supplemented with PRSE at the rate of 0 (control), 0.2, 0.4, 0.6, and 0.8% of the diets four times/day for 60 days to evaluate the body weight, survival rate, and immune function. In Experiment 2, the juvenile shrimp from Experiment 1 were randomly redistributed into six groups (four treatment groups as in Experiment 1, positive control, and negative control with 3 replicates/group and 30 shrimp/tank) and challenged with either V. parahaemolyticus or WSSV via immersion (10⁵ colony‐forming units/mL) and oral (feeding with infected tissues) routes, respectively, to evaluate disease resistance. Our results demonstrated that shrimp body weight for the 0.8% PRSE group was significantly greater than the other groups, and those fed 0.4%–0.8% PRSE demonstrated a significant improvement in survival, total hemocyte count, phagocytic activity, phenoloxidase activity, and superoxide dismutase activity compared with the controls. On day 7 following the V. parahaemolyticus challenges, the survival rates of the 0.4%–0.8% PRSE‐fed shrimp (70%–73%) were significantly greater than the control counterpart (46%). However, shrimp challenged with WSSV suffered severe mortality regardless of the treatment groups, but those treated with 0.4%–0.8% PRSE showed delayed mortality. In conclusion, results suggested that dietary PRSE supplemented at 0.4%–0.8% diets were beneficial for improving overall health and disease resistance in shrimp culture.

An aquaponic system which is an integration of hydroponics with aquaculture is sustainable, ecologically friendly, and uses non‐renewable resources with very high efficacy. The increasing trend in aquaponics research demonstrates a growing recognition of its potential to address critical global issues such as food security, water conservation, and sustainable agriculture, particularly in regions vulnerable to climate change and resource limitations. It has witnessed remarkable advancements in recent years, with various methods and variations emerging to enhance its functionality and productivity. The purpose of this review is to unify fragmented research on aquaponics and provide a comprehensive resource that emphasizes its potential for broad adoption and successful implementation in varied environments. This review focuses on recent innovations in aquaponic system designs for various climates and examines key advancements in critical areas, including microbial communities, biofiltration, feed management, water quality, and nutrient cycling, emphasizing the interdisciplinary nature of aquaponics. Coupled systems suit moderate climates with high resource efficiency, while decoupled systems offer flexibility across diverse climates by allowing independent control of each component. Innovations such as sandponics, algaeponics, and saline aquaponics address challenges like water scarcity and nutrient efficiency. Smart technologies like IoT and AI are integrated into aquaponics, automating monitoring and nutrient management for better productivity. Emerging areas, including vermi‐aquaponics and flocponics, offer new solutions for nutrient cycling, making aquaponics more efficient, adaptable, and resource‐conserving globally. This paper also examines the sustainability aspects of aquaponics, emphasizing its economic, social, and environmental dimensions. Despite high setup costs and nutrient complexities, aquaponics offers significant potential for sustainable food production by minimizing water use and reducing synthetic fertilizers. Its scalability in both urban and rural areas, along with innovations like vertical systems, presents promising solutions for enhancing agriculture and food security across diverse environments.

Aquaculture generates less greenhouse gas emissions compared to other agriculture practices due to its limited land‐use changes, improved feed conversion rates, and reduced methane emissions from animals' digestive systems. The aquaculture carbon emissions come from various production stages, including feed production, farm operations, processing, transportation, and so forth. This review illustrates the theories, calculation methods, and practical applications of the carbon footprint in fisheries and aquaculture, as well as the challenges and strategies for emission reduction. The factors influencing the carbon footprint of fishing and manufacturing aquaculture are also discussed. Further research should focus on refining carbon footprint assessment techniques, promoting green technologies and sustainable aquaculture practices. Managing aquaculture's carbon footprint though is crucial for mitigating environmental impacts and supporting sustainable development.

Feed formulations low in fish meal and fish oil can decrease feed intake and nutrient digestibility. Dietary application of lecithins could improve growth performance and nutrient digestibility; however, knowledge about specific lecithins and their effects in post‐juvenile fish is lacking. This study evaluated the effects of a commercially available rapeseed lecithin mixture on growth performance, feed intake, and nutrient digestibility of post‐juvenile rainbow trout (77.1 ± 12.1 g). A commercially based diet low in fish meal served as the control, while in the remaining three diets, fish oil was replaced with lecithin by 50%, 100% with lecithin, or 100% with a mixture of equal amounts of lecithin and rapeseed oil. Fish were fed to apparent satiation twice per day for 56 days. At the end of the trial, growth parameters, health parameters, nutrient digestibility, and filet coloration were assessed. Overall growth and feed intake were significantly elevated in all lecithin diets compared with the control group. The nutrient digestibility of all diets containing lecithin was similar to the control, and no differences in health parameters were detected. Filet coloration was significantly improved in diets of 100% fish oil replacement. Rapeseed lecithin can act as a feed attractant in fish meal and fish oil‐reduced diets.

Crab stocking densities in brackish water ponds can influence crab growth rate, survival, and production volume. This study aimed to determine the optimum grow‐out stocking density for Scylla tranquebarica crablets reared in lined ponds to supply the soft‐shell crab industry. Three stocking density treatments (1, 4, and 8 ind./m²) were applied to crablets reared in lined ponds for 90 days. The crablets were fed low‐value fish (Leiognathus equula) at an initial rate of 100% of total body weight for two weeks, reduced to 3% toward the end of the study. Crablets stocked at 1 and 4 ind./m² had a significantly (p < 0.05) higher net growth (NG) and daily growth rate (DGR) than crablets stocked at 8 ind./m². Deformed crabs were also most common at the highest stocking density. The intermediate stocking rate achieved moderate survival and feed conversion rates, with the highest crab production volume (19.65 ± 0.10 kg/100 m²) and net income (6845.60 US$/Ha/2 crops/year). Based on these findings, a stocking rate of around 4 ind./m² is recommended for the grow‐out of S. tranquebarica crablets in lined ponds.

In this study, we aimed to experimentally induce fatty liver disease in rainbow trout, Oncorhynchus mykiss, and then assessed the illness recovery process, growth, and changes in the expression of FAAH and ACADL genes in both healthy (0 [C2] and 4% apple cider vinegar [T4]) and diseased fish (0 [C1], 1 [T1], 2 [T2], and 4% [T3]) apple cider vinegar. To conduct the study, 180 rainbow trout were randomly assigned to six different experimental treatments, each with three replications. The investigation lasted for 60 days. Growth indices, liver histology, blood biochemical parameters, and transcription of the ACADL and FAAH genes in the liver tissue were measured. The study found no significant differences in the final weights across all the treatments. Apple cider vinegar (ACV) administration resulted in a decrease in AST, ALT, and ALP; however, these values did not show a significant difference from C2. In T3, triglycerides significantly decreased (p < 0.05), whereas in T4, triglycerides significantly increased (p < 0.05). Hepatocytes from ACV‐containing treatments showed reduced fat compared with T4 and the control group (C1). While there was a significant difference (p < 0.05) in the expression of the FAAH gene, there was no significant difference (p > 0.05) in the expression of the ACADL gene between experimental treatments. The findings of our study indicate that an inclusion of up to 2% ACV may have positive effects on trout aquaculture and NAFLD treatment.

Saccharina japonica is common aquaculture species in Asia, whereas S. latissima is cultivated in North America and Europe. This study aims to select superior strains using breeding techniques for high‐temperature tolerance and faster development at the early sporophytic stage. Qualitative experiments were conducted to observe the reproduction and early development of sporophytes under different temperatures (5, 10, 15, and 20°C) and light conditions (5 and 40‐μmol photons m⁻² s⁻¹) for 20 days after male and female gametophytes were crossed. Two female (F05 and F15, S. japonica; FB and FO, S. latissima) and male (M06 and M14, S. japonica; MB and MO, S. latissima) gametophyte strains in each species were used. No inter‐specific crosses were made. Four possible intraspecific crosses were cultured. Regardless of the species, the development of sporophytes was observed earlier at 10°C than all other temperatures (5, 15, and 20°C). No sporophytes were observed at 20°C during the experiment. The crosses of F15xM14 (S. japonica) and FBxMB (S. latissima) showed higher thermal tolerance and rapid development of sporophytes than other crosses. These results suggest that optimal reproduction and early development of sporophytes can vary from species to species of the same genus and even between strains of the same species.

Disease freedom surveillance is challenging in settings where environmental conditions and population health can change abruptly. We propose a novel approach to freedom evaluation that is specifically suited to open environments. The approach merges information about pathogen introduction risk with information from pathogen surveillance to estimate assurance of freedom. While the logic is not new, the approach uses a generalizable model designed by an expert panel to estimate introduction probability, easing the need for costly, site‐specific risk assessment. This introduction probability is then used to inform the time‐adjusted value of historical surveillance data and adapt the consequent requirements (sampling volume and frequency) of future surveys. We apply the approach to an open water region on the Pacific Coast of the United States known for its mollusk production. Results support absence of the target pathogens—Marteilia refringens, Marteilioides chungmuensis, Ostreid herpesvirus 1, Perkinsus marinus, and Perkinsus olseni—for the host species, region, and time‐period under investigation. Findings demonstrate (1) the ability to retain assurance in pathogen freedom through time in open systems, (2) the limitations of sample volume, and importance of sampling frequency, for pathogens with higher introduction risk, and (3) expert elicitation as a generalizable alternative to formal risk assessment.

Piscine intestinal Cryptosporidium infection is a known cause of severe illness and mortality in juvenile Asian sea bass, with inflammation playing a central role. This inflammation triggers the generation of reactive oxygen species (ROS), leading to irreversible DNA damage and activation of apoptosis pathways. However, the specific impact of inflammation on ROS production, DNA damage, and apoptosis in this context remains unclear. This study investigated the pathogenic role of inflammation and ROS in causing DNA damage and cell apoptosis in piscine intestinal cryptosporidiosis. Forty‐four intestinal samples from 60‐ and 90‐day juvenile Asian sea bass were divided into four groups based on Cryptosporidium infection status. Histopathological evaluation and immunofluorescent analysis were conducted to assess ROS production, DNA damage, and cellular apoptosis markers. Results showed significantly higher inflammatory cell infiltration, intracellular ROS production, DNA damage, and cellular apoptosis in 60‐day infected fish compared to 90‐day infected fish. These findings underscore distinct responses in juvenile Asian sea bass to piscine intestinal cryptosporidiosis, highlighting severe inflammation, oxidative DNA damage, and cellular apoptosis, particularly in younger fish.

The integrated multitrophic aquaculture (IMTA) of sea cucumber and abalone has been proposed as a potential bioremediation tool that stimulates increased abalone growth. This study assessed the role of sea cucumber stocking density and frequency of tank cleaning in IMTA on growth, water, and sludge bioremediation. The study was conducted for 16 weeks and was made of four treatments and four replicates; abalone cocultured with sea cucumber (low density—27: 1 g [abalone (ab): sea cucumber (sc)]) with tanks cleaned once a week (L1); abalone cocultured with sea cucumber (low density) with tanks cleaned twice a week (L2); abalone cocultured with sea cucumber (high density—15:1 g [ab:sc]) with tanks cleaned once a week (H1) and abalone cocultured with sea cucumber (high density) with tanks cleaned twice a week (H2). Rearing water nitrite was significantly lower (p = 0.001) at high stocking density of sea cucumbers, but sludge was unaffected. Tanks cleaned once weekly had higher sludge organic matter (p = 0.015) and sludge sulfur content (p = 0.020) and lower sludge carbon (p = 0.003) and nitrogen content (p = 0.049). At the end of the experiment, the stocking density of sea cucumber and frequency of tank cleaning affected abalone mean weight [p = 0.047; p = 0.011, respectively] without a significant interaction (p = 0.517). Abalone in H1 had a higher mean weight and shell length than abalone in L2 and H2 but was similar to those in L1. The stocking density and frequency of cleaning used in this study had no effect on the growth of sea cucumbers [p = 0.150; p = 0.470, respectively]. This study has shown that in an abalone–sea cucumber IMTA system, the stocking density of sea cucumber and the frequency at which tanks are cleaned influence abalone growth and bioremediation of the rearing water. Our result suggests H1 as the best density (ab:sc) and cleaning frequency. The tank cleaning frequency alone affects the tank sludge quality; tanks need not be washed too frequently as, in addition to causing animal stress, cleaning markedly increased carbon and nitrogen level of tank sludge. Both these effects are likely to negatively impact abalone growth.

The aim of this study was to assess the digestible protein value of three novel poultry products (Pea/Lentil‐PM, Hen on Hen‐PM, and soybean meal (SBM)‐PM), then a growth trial with a 2 × 5 design was conducted where SBM‐PM was included at five levels: 0, 5, 10, 15, and 30% in both a fish meal (FM)‐based diet and a plant protein (PP)‐based diet. Thirty rainbow trout (initial size = 10.7 ± 0.15 g; Troutlodge Inc, Sumner, WA) per tank were stocked into a 15°C recirculating system. Fish in triplicate tanks were fed twice daily to apparent satiation for 12 weeks. SBM‐PM had no effect on final weight (p = 0.3665; FM 233 vs. PP 237) or growth rate (p = 0.4703; FM 2070% vs. PP 2097%). Significant interactions between dietary protein and SBM‐PM for both intake (p = 0.0080) and FCR (p = 0.0081) indicate increased intake of fish fed the plant protein‐based diet without SBM‐PM. Regression modeling of this effect yields a polynomial model with an R‐square of 0.78; p < 0.0001 explained by the relationships: PlantFCR=0.875−0.0087Inclusion+0.00062Inclusion2 and Plant intake=2.02−0.02Inclusion+0.0014Inclusion2, respectively. These values suggest that the SBM‐PM can be included up to 30% in rainbow trout feeds to reduce feed costs without negatively impacting performance.

This study investigated the effects of water and feed‐derived boron on the growth performance and blood parameters of Nile tilapia fingerlings. Two different experiments were designed for this purpose. The first phase of the study determined the LC50 (96‐h) value of boron for Nile tilapia. Fish were then fed in water containing boron at a ratio of 1:20 of the LC50 value. In the second experiment, feed containing boron at different rates (0.00%, 0.01%, 0.05%, and 0.10%) was fed for 40 days. At the end of the feeding period, growth performance, hematology, and blood biochemistry parameters were determined. The study concluded with a calculated LC50 value of 161.053 mg/L boron for Nile tilapia. The initial weight was 12.51 ± 0.79 g; at the end of feeding, the final weights were determined as 26.36 ± 0.15 g for the control and 28.07 ± 0.23, 32.28 ± 0.25 and 24.81 ± 0.48 g for 0.01%, 0.05% and 0.10% of boron feed treatments, respectively. At the end of feeding in water containing boron, the final weight of Nile tilapia was determined as 24.26 ± 0.26 g (LC50/20%). The results showed that feeding Nile tilapia with 0.05% boron‐supplemented feed stimulated growth and positively affected blood parameters, whereas waterborne boron inhibited Nile tilapia growth and negatively affected blood parameters.

Depleting European lobster, Homarus gammarus, wild stocks from historic overexploitation, stock enhancement programs, and farming of this lucrative species are viable options for meeting consumer demand. Early larval stages pose a hatchery challenge because of low survival rates. This study evaluates pseudo‐green water benefits during the larval stage. Commonly used aquaculture algal species, Tetraselmis suecica (TS), Dunaliella tertiolecta (DT), and Nannochloropsis sp. (N), were tested as a monoculture or mixture treatment over 13 days post‐hatching of the lobster larvae, from this, seven treatment permutations (TS, DT, N, TS + DT, TS + N, DT + N, and TS + DT + N) were included. A further eighth treatment with no added algae was used as a basal reference point (control). The growth assessment found that co‐culturing had benefited carapace length and shell coloration (cephalothorax, p = 0.023) but no enhancement to the weight or survival ratios was observed. All larvae reached stage III by the 13th day, with survival rates ranging between 12.5% and 20%. Results indicated that mixed algal species generally had higher mean growth perfromance values than monoalgal cultures and clearer water. Nannochloropsis sp. significantly improved growth performance (higher weight and length). Algal matrices containing Nannochloropsis sp. resulted in the highest growth performance, emphasizing the importance of co‐culturing lobster larvae with algae to improve hatchery operations.

Estimating fish growth in real time has many benefits for indoor aquaculture farms, such as saving labor time and costs, reducing water pollution during feeding, improving feeding activity and determining when to harvest. Hence, this study proposed a visual‐information‐based method for measuring olive flounder (Paralichthys olivaceus) length, using accurate growth tracking for efficient aquaculture management. Using two cameras, an light‐emitting‐diode (LED) grid was placed at the bottom of the water tank to measure fish length. The pixels unit from the fish length in the captured image was converted to centimeters based on the relationship of a pre‐built dataset. A total of 180 lengths were calculated using images captured by the cameras. The average length of each fish acquired from the cameras was calculated separately, and Lagrange's interpolating polynomial algorithm was implemented to calculate the overall length of each fish. This method reduced the computational complexity, and results were obtained more rapidly and in a user‐friendly environment. The power model generated the length–weight relationship, which allowed us to estimate the body weight of each olive flounder based on the length. The proposed approach enabled us to calculate the length of olive flounders with a highly accurate R² of 0.995.

This research article presents a systematic literature review on the current state‐of‐the‐art artificial intelligence (AI) methodologies used in aquaculture applications. As the demand for seafood continues to grow, the aquaculture industry faces numerous challenges, including disease management, feeding optimization, water quality monitoring, and extraction of aquaculture area. To address these challenges effectively and sustainably, AI techniques have been increasingly applied in aquaculture systems over recent years. This review aims to analyze various AI methodologies utilized within different aspects of aquacultural practices. By examining existing studies and identifying trends and gaps in research areas related to AI integration into aquaculture practices, this paper provides valuable insights for further advancements. The purpose was to synthesize current knowledge on application and its challenges in implementing AI technologies within the commercial aquaculture industry. Specifically, the review is to identify and analyze peer‐reviewed studies reporting on applications of AI technologies in aquaculture industry, to classify and summarize the key findings from the selected studies in aquaculture operations through AI, and to evaluate and discuss any challenges reported regarding the implementation and adoption of AI solutions in commercial aquaculture. The overall goal was to comprehensively assess these via a systematic literature review process. Challenges of AI technologies and methods were identified in the research literature for applying AI to optimize commercial aquaculture practices and production. An exhaustive search of a scholarly database from Scopus, was performed and papers published in English between 2020 and 2024 were considered for inclusion. After a rigorous screening process involving over 116 studies, 57 highly relevant works were identified and analyzed according to key themes involving demonstrated AI applications, employed methodologies and challenges that are expected when applying such methods. The findings revealed that AI‐driven tools such as computer vision, machine learning, and predictive modeling hold much potential for enhancing sustainability, efficiency, and productivity within aquaculture operations through applications like disease monitoring, environmental management, and production optimization. However, the review also uncovered substantial challenges that will continue limiting widespread adoption, including restricted access to representative data, prohibitive expenses, technical complexities, lack of social acceptance, and data privacy and security concerns. This comprehensive synthesis of the current evidence available provides an empirical foundation upon which further progress can be built by identifying priority areas requiring additional research efforts to fully address challenges on the responsible integration of suitable solutions for the commercial aquaculture industry globally.

The objective of the present study was to determine the effects of spray‐dried and fresh forms of the microalgae Nannochloropsis oculata and other commonly used commercial diets on vitamin and mineral compositions of rotifer produced under commercial conditions. Experimental rotifers groups were fed Protein‐Plus® (PP treatment), Inactive Beaker's Yeast® (INBY treatment), Algome® (Algome treatment), freshly cultured N. oculata (FA treatment), and spray‐dried N. oculata (SDN treatment). At the end of the experiment, seven essential vitamins, nine macro‐ and micro‐minerals, and two pigments were analyzed in diets and rotifers. All the treatments tested provided adequate levels of Ca, P, Mg, and Co to the rotifers, but insufficient levels of I, Zn, and vitamins B2 and E. Moreover, PP diet produced rotifers with high levels of vitamins B1, B3 and B9, and P; the SDN diet produced rotifers with high levels of P and Cu; the Algome diet produced rotifers high in vitamins B3 and B9, and Ca; the INBY diet produced rotifers with high levels of vitamin B1 and Ca; and the FA diet produced rotifers with more vitamin B6, Se, and Cu. In conclusion, specific minerals or vitamins corrections are required in these feeds for rotifers to adequately meet the nutritional needs for marine larvae.