Aquaculture International最新文献

{"title":"MSSFNet: multi-scale semantic fusion density estimation net for accurate fish counting under complex aquacultural environments","authors":"Haiqing Wang,&nbsp;Xuehui Wu,&nbsp;Xi Chen,&nbsp;Hongfeng Yu,&nbsp;Zhipeng Zhao,&nbsp;Huanliang Xu,&nbsp;Zhaoyu Zhai","doi":"10.1007/s10499-026-02646-4","DOIUrl":"10.1007/s10499-026-02646-4","url":null,"abstract":"<div><p>Accurate fish population estimates are essential for improving production efficiency and refined management in aquaculture. Although object detection algorithms are widely used for fish counting, they are often limited by fish overlapping, occlusion, and complex environmental conditions. In contrast, density estimation has gradually emerged as an effective approach due to its strong adaptability to varying environments. However, variations in fish size, high-density fish aggregation, and water turbidity pose substantial challenges to the counting accuracy. To tackle these challenges, this study proposes a density estimation model based on multi-scale semantic representations from different network depths. The MSSFNet incorporates three feature extraction modules, including a global feature extractor, a multi-scale feature extractor, and a local feature extractor, which collaboratively improve robustness to scale variation, dense aggregation, and complex background interference. In addition, we propose the Focal Distribution Matching Count Loss (FDMC Loss), which alleviates sample imbalance in density estimation. By down-weighting the contribution of easy samples during training and emphasizing harder ones, FDMC Loss improves sensitivity to irregular distributions and intricate regions, thereby producing more accurate density maps. The experimental results on a large-scale dataset containing 3131 images with approximately 364,000 annotated fish fry (116 fish fry per image on average) demonstrate the effectiveness of MSSFNet. On the test dataset, MSSFNet achieves a Mean Absolute Error of 6.65, Root Mean Square Error of 9.09, relative Root Mean Square Error of 0.085, and a coefficient of determination of 0.9855. Furthermore, deployment experiments on mobile platforms demonstrate the feasibility of MSSFNet for resource-constrained applications, highlighting its potential for practical aquaculture deployment. MSSFNet effectively reduces prediction errors and accurately captures the common features of targets across different scales and environments.</p></div>","PeriodicalId":8122,"journal":{"name":"Aquaculture International","volume":"34 6","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Behavior and physiology of the sea cucumber Apostichopus japonicus with high temperature-induced skin ulceration","authors":"Sihan Wang,&nbsp;Hengye Wu,&nbsp;Jia Luo,&nbsp;Yingzhuo Sun,&nbsp;Xiajing Wang,&nbsp;Lei Chen,&nbsp;Chong Zhao","doi":"10.1007/s10499-026-02641-9","DOIUrl":"10.1007/s10499-026-02641-9","url":null,"abstract":"<div><p>The aquaculture of the sea cucumber <i>Apostichopus japonicus</i> is threatened by high temperature-induced skin ulceration in northern China. The present study compared the behavioral and physiological responses between ulcerated and non-ulcerated sea cucumbers at 32 °C, and evaluated the anti-ulceration advantages of reef-seeking behavior. Behavioral tests revealed a significantly lower reef-seeking tendency in ulcerated individuals compared to the non-ulcerated ones (<i>P</i> &lt; 0.01), whereas righting, adhesion, and feeding behaviors did not differ significantly. Further, ulcerated sea cucumbers exhibited higher cortisol levels (<i>P</i> = 0.036), and exogenous cortisol injection significantly increased significanfly the ulceration rate (<i>P</i> = 0.018). These findings indicate that skin ulceration greatly impairs reef-seeking behavior, with cortisol mediating ulceration development. Compared to non-reef-seeking individuals, reef-seeking sea cucumbers developed significantly fewer ulcers (<i>P</i> = 0.001) and maintained significantly lower concentrations of cortisol (<i>P</i> = 0.032) and serotonin (5-HT) (<i>P</i> = 0.036). These findings indicate reef-seeking behavior enhances the ulcer resistance by regulating cortisol and 5-HT levels. Collectively, the present study showed that reef-seeking sea cucumbers had better behavioral and physiological traits under heat stress, and were with a markedly lower skin ulceration rate than non-reef-seeking individuals.</p></div>","PeriodicalId":8122,"journal":{"name":"Aquaculture International","volume":"34 6","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148750981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of raw chitin from Hermetia illucens exuviae and lauric acid on growth performance and nutrient utilization, gut morphology and functionality, and gene expression in rainbow trout (Oncorhynchus mykiss) fed semi-purified diets","authors":"Roselida A. Opere,&nbsp;Nicole Verdile,&nbsp;Giulia Pascon,&nbsp;Enrico Daniso,&nbsp;Gaia S. Bosco,&nbsp;Deborah Marchisio,&nbsp;Tiziana A. L. Brevini,&nbsp;Simona Picchietti,&nbsp;Valeria Pianese,&nbsp;Fulvio Gandolfi,&nbsp;Francesca Tulli,&nbsp;Jorge Dias,&nbsp;Gloriana Cardinaletti","doi":"10.1007/s10499-026-02639-3","DOIUrl":"10.1007/s10499-026-02639-3","url":null,"abstract":"<div><p>This study aimed to evaluate the effects of <i>Hermetia illucens</i> (black soldier fly) exuviae, as a chitin source (CHI), and lauric acid (LA) on the intestinal physiology of rainbow trout (<i>Oncorhynchus mykiss</i>). Four isoproteic and isolipidic semi-purified diets were tested: a control diet (CTRL), a diet with 1.5% CHI (C-CHI) and two diets with 1.5% CHI and LA at 0.1% and 0.2% (C-CHI-LAU1 and C-CHI-LAU2, respectively). A total of 144 juvenile rainbow trout (91.3 ± 2.9 g) were fed the experimental diets for 12 weeks (2% body weight daily feeding rate), after which liver and digestive tract samples were collected for analysis. Our findings showed that CHI and LA inclusion did not affect growth performance and biometric indices. The C-CHI diet reduced mucosal fold length and altered goblet cell mucin composition. Moreover, the C-CHI diet decreased PepT-1 signal intensity. None of the diets affected immunohistochemical alkaline phosphatase expressions. Brush border membrane and digestive enzyme activity as well as the chitinolytic enzyme activity were modulated in digestive tract-specific manner. The expression of <i>fabp2</i> was downregulated by C-CHI and C-CHI-LAU1 diets, while <i>slc2a1</i> was downregulated by C-CHI-LAU1. In conclusion, 1.5% CHI and up to 0.2% LA supplementation did not impair rainbow trout growth performance, but 1.5% CHI negatively affected intestinal morphology, mucin composition, and some intestinal health markers and nutrient transporters. However, the combination of CHI with LA in the diet for rainbow trout mitigated the adverse effects of CHI.</p></div>","PeriodicalId":8122,"journal":{"name":"Aquaculture International","volume":"34 6","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10499-026-02639-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148750834","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":"Ontogenetic shifts in salinity tolerance and metabolic strategies of Heliocidaris crassispina: implications for aquaculture management","authors":"Zirui Li,&nbsp;Qiyang Sun,&nbsp;Dejian Su,&nbsp;Yang Ming,&nbsp;Junyi Wen,&nbsp;Zonghe Yu","doi":"10.1007/s10499-026-02643-7","DOIUrl":"10.1007/s10499-026-02643-7","url":null,"abstract":"<div><p>Understanding the effects of salinity on the physiological performance of <i>Heliocidaris crassispina</i> across its life history is imperative for aquaculture. This study investigated the survival, growth, and/or metabolism (oxygen consumption and ammonia excretion) of larval, juvenile, and adult <i>H. crassispina</i> at salinities ranging from 20 to 40. Larval survival and development peaked at an optimal salinity range of 32 to 36, whereas growth stagnated at 24 and lower. Juveniles exhibited optimal growth performance within a range of 28 to 32. They were highly sensitive to extreme salinity, exhibiting significant negative growth at salinities of 20 (− 0.07 ± 0.19% d^–1) and 40 (− 0.32 ± 0.28% d^–1). In contrast, adults demonstrated a broader optimal salinity range of 28 to 36, where stable somatic growth was maintained. The oxygen to nitrogen (O:N) ratio varied with salinity and developmental stage. At optimal salinities, juvenile O:N ratios were well above 24, suggesting a greater contribution of carbon-based substrates to metabolic fuel use. Under hypersaline stress at 40, the juvenile O:N ratio plummeted to 8.06, suggesting a shift toward protein-dominated catabolism, which may help explain their negative growth. Adult O:N ratios remained above 24 under extreme conditions. Overall, adults showed wider salinity tolerance, while early life stages were highly vulnerable. For optimal aquaculture management, salinity should be maintained at approximately 32 for larvae and juveniles, whereas adult grow-out can be conducted across a broader range of 28 to 36.</p></div>","PeriodicalId":8122,"journal":{"name":"Aquaculture International","volume":"34 6","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148750827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Non-invasive weight estimation of cultured abalone (Haliotis discus hannai) using image-based calculated volume and morphometric correction","authors":"Donggil Lee,&nbsp;Jungjun Park","doi":"10.1007/s10499-026-02633-9","DOIUrl":"10.1007/s10499-026-02633-9","url":null,"abstract":"<div><p>Weight information is essential for grading, growth monitoring, biomass assessment, and harvest decision-making in abalone aquaculture. Image-based morphometric measurement reduces repeated weighing; however, geometric volume models based on external dimensions may retain residual errors due to individual shape variation. This study developed and evaluated interpretable regression models for estimating the weight of cultured abalone (<i>Haliotis discus hannai</i>) from image-based morphometric measurements, with a particular focus on the effect of a morphometric correction variable. After quality control based on measured density and morphometric consistency, 490 of 503 individuals were included in the final analysis. Semi-ellipsoid-based calculated volume (<i>C</i>_<i>v</i>) and a morphometric correction variable (<i>M</i>_<i>c</i> = <i>C</i>_<i>v</i>/<i>PA</i>, where <i>PA</i> is projected area) were calculated from total length, body width, thickness, and <i>PA</i>. Four regression models were evaluated using the same five-fold cross-validation scheme. Predictive performance was assessed using root mean square error (RMSE), mean absolute error (MAE), coefficient of determination (<i>R</i>²), and mean absolute percentage error (MAPE). The <i>C</i>_<i>v</i>-based linear model showed RMSE 4.18 g, MAE 3.20 g, <i>R</i>² 0.969, and MAPE 6.32%. The morphometric correction power model combining <i>C</i>_<i>v</i> and <i>M</i>_<i>c</i> produced the lowest prediction error, with RMSE 3.50 g, MAE 2.62 g, <i>R</i>² 0.978, and MAPE 5.17%, reducing RMSE by 16.30% relative to the <i>C</i>_<i>v</i>-based model. These results indicate that <i>C</i>_<i>v</i> is an effective baseline variable and <i>M</i>_<i>c</i> can reduce residual errors associated with individual shape variation. The model may provide useful weight information for non-invasive grading support, growth monitoring, and harvest decision-making under consistent image-acquisition conditions.</p></div>","PeriodicalId":8122,"journal":{"name":"Aquaculture International","volume":"34 6","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10499-026-02633-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148750884","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":"Larviculture of steindachneridion spp.: an overview of feeding strategies and experimental evaluation of alternative diets for s. scriptum","authors":"Bruno Aloísio Hensel,&nbsp;Diogo Luiz de Alcantara Lopes,&nbsp;Fernanda Picoli","doi":"10.1007/s10499-026-02629-5","DOIUrl":"10.1007/s10499-026-02629-5","url":null,"abstract":"<div><p>The larviculture of <i>Steindachneridion</i> spp. faces low survival rates due to early cannibalism. The literature indicates that the larviculture of this genus is complex due to high intraspecific aggressiveness influenced by factors such as luminosity and food density. Aiming to evaluate practical strategies, a 20-day experimental trial was conducted with \"suruvi-bocudo\" (<i>S. scriptum</i>) post-larvae (PL) in a completely randomized design (10 PL/L), testing three complementary diets (n = 5): exclusive brine shrimp (<i>Artemia salina</i>) nauplii (AT); Egg Yolk Powder + Artemia (EYP + A); and Milk Powder + Artemia (MP + A). Water parameters and daily mortality were monitored, with causes of death classified via stereomicroscope as with or without injuries. At the end of the experiment, the EYP + A treatment showed higher weight gain and final weight (<i>p</i> &lt; 0.05), although there were no significant differences in survival and cannibalism rates among groups. Mortality was concentrated in the first five days, coinciding with the transition to exogenous feeding. The MP + A treatment had the lowest cannibalism rate in absolute numbers but the highest occurrence of deaths with injuries (<i>p</i> &lt; 0.05). This suggests that a possible nutritional deficiency in this group may have hindered the completion of cannibalistic attacks, resulting in a higher occurrence of deaths with injuries. It is concluded that exclusive feeding with Artemia nauplii or supplementation with egg yolk powder are effective strategies for the initial development of the species, while milk powder proved inefficient in reducing mortality related to aggressiveness.</p></div>","PeriodicalId":8122,"journal":{"name":"Aquaculture International","volume":"34 6","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10499-026-02629-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148750805","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":"System dynamics–based optimization of potassium monopersulfate disinfection in industrialized Penaeus vannamei culture","authors":"Junhui Qi,&nbsp;Cong Xu,&nbsp;Zhao Chen,&nbsp;Zhiqiang Chang,&nbsp;Jitao Li,&nbsp;Baoran Wang,&nbsp;Shijia Yuan,&nbsp;Qianqian Zhai","doi":"10.1007/s10499-026-02634-8","DOIUrl":"10.1007/s10499-026-02634-8","url":null,"abstract":"<div><p>Potassium peroxymonosulfate (PMS) is widely used as a disinfectant in shrimp aquaculture, but inappropriate dosing can lead to ineffective pathogen control or toxicity to cultured organisms. This study developed a quantitative framework to optimize disinfection in industrialized Pacific white shrimp (<i>Penaeus vannamei</i>) culture. The approach integrates pathogen inactivation, disinfectant decay, and shrimp safety. Laboratory experiments quantified the inactivation kinetics of PMS against pathogenic <i>Vibrio</i> species. Additionally, we assessed the decay of effective disinfectant concentration under varying water-quality conditions and the acute toxicity to juvenile shrimp. The results showed that PMS exerted a marked concentration-dependent inactivation effect on <i>Vibrio</i> spp., with maximum reductions of approximately 1.70–1.96 log₁₀ for sensitive strains at 2 mg/L. However, at lower concentrations (0.50–1.00 mg/L), <i>V. alginolyticus</i>, <i>V. campbellii</i>, and <i>V. parahaemolyticus</i> showed regrowth after 6–12 h. The decay of PMS-derived residual oxidant followed first-order reaction kinetics and was significantly affected by environmental factors, including temperature, total suspended solids, and chemical oxygen demand. The 96-h median lethal concentration (LC₅₀) for juvenile shrimp was 6.365 mg/L. This value corresponds to a calculated safe concentration (SC) of 0.6365 mg/L. These datasets were integrated into a system dynamics model that couples <i>Vibrio</i> growth, disinfectant decay, and bactericidal efficacy, enabling dynamic simulation of pathogen suppression and post-disinfection rebound. Model predictions agreed well with independent experimental observations. This study provides a practical decision-support tool to balance <i>Vibrio</i> control with shrimp safety. These results support precision disinfection management strategies for sustainable aquaculture.</p></div>","PeriodicalId":8122,"journal":{"name":"Aquaculture International","volume":"34 6","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148750678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Organic-matter threshold and mechanisms modulating the growth of juvenile razor clam Sinonovacula constricta","authors":"Ying Zeng,&nbsp;Zhanfeng Liang,&nbsp;Chunpu Zhao,&nbsp;Anhao Wang,&nbsp;Wenhao Yin,&nbsp;Jiayi Cao,&nbsp;Kai Liao,&nbsp;Jilin Xu,&nbsp;Shuonan Ma","doi":"10.1007/s10499-026-02637-5","DOIUrl":"10.1007/s10499-026-02637-5","url":null,"abstract":"<div><p>The razor clam <i>Sinonovacula constricta</i> supports intensive aquaculture, yet how its growth responds to sediment organic matter (OM_S) enrichment (a ubiquitous stressor in bivalve culture) is unresolved. Moderate OM_S can benefit filter-feeding bivalves by supplementing food supply, yet excessive enrichment degrades sediment quality and triggers stress to bivalves; however, the threshold levels and key pathways governing growth impacts remain unresolved. Here, we reared juveniles for 35 days along an OM_S gradient (14 − 44 mg g⁻¹ dw) to determine the OM_S threshold constraining juvenile <i>S. constricta</i> growth and resolve the underlying mechanisms. The results revealed a critical OM_S threshold existed near 36 − 38 mg g⁻¹ dw: below this value, growth performance (e.g., wet weight and survival) was indistinguishable from controls; above it, growth declined and mortality rose. Elevated porewater un-ionized ammonium further suppressed growth via direct toxicity. Further, elevated OM_S lowered dissolved oxygen by stimulating nitrification and aerobic mineralization, forcing juvenile <i>S. constricta</i> to shift from aerobic metabolism to inefficient anaerobic glycolysis (as indicated by elevated hexokinase and lactate dehydrogenase activities), thereby inducing physiological stress. Concurrently, hypoxic high-OM_S sediments promoted sulfate reduction and sulfide accumulation, synergistically exacerbating hypoxia toxicity and elevating mortality. High OM_S also reduced gut microbial diversity and enriched opportunistic pathogens (e.g., <i>Vibrio</i>) of juvenile <i>S. constricta</i>, potentially increasing disease susceptibility. Meanwhile, systemic oxidative stress was accompanied by down-regulation of key immune genes, compromising juvenile <i>S. constricta</i> defense. Our findings provide a mechanistic framework for managing sediment OM_S in intensive clam culture, reconciling the contradiction between aquaculture industry and environmental sustainability.</p></div>","PeriodicalId":8122,"journal":{"name":"Aquaculture International","volume":"34 6","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148750807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Strengthening the value chains of seaweed for inclusive coastal livelihood prosperity: A strategic blueprint for fostering a sustainable blue economy of Bangladesh","authors":"Sayeda Afrin Busra,&nbsp;Md. Ramzan Ali,&nbsp;Md Nahiduzzaman,&nbsp;A. B. M. Mahfuzul Haque,&nbsp; Abdullah-Al-Mamun,&nbsp;Md Moshiur Rahman,&nbsp;Md Asaduzzaman","doi":"10.1007/s10499-026-02645-5","DOIUrl":"10.1007/s10499-026-02645-5","url":null,"abstract":"<div><p>In Bangladesh, seaweed farming, primarily centered on the cultivation of <i>Gracilaria</i> sp. and <i>Ulva lactuca</i>, is increasingly recognized as a potential driver of the blue economy, with benefits for ecological resilience, livelihood diversification, and industrial innovation. However, the sector remains underdeveloped due to dependence on wild seaweed seedlings, simple production methods, weak post-harvest infrastructure, and limited market integration. This study provides one of the first empirical assessments of the emerging seaweed (<i>Gracilaria</i> sp. and <i>U. lactuca</i>) value chain in Bangladesh, drawing on household surveys, key informant interviews (KII), focus group discussions (FGD), and multi-stakeholder workshops to identify the present status, structural barriers, and outline a sequenced policy roadmap. Farmers practiced three main methods for cultivating both <i>Gracilaria</i> sp. and <i>U. lactuca</i>: off-bottom long-line (59.5%), off-bottom net (24.3%), and floating raft (16.2%). Average yield for both cultivated species reached 2.6 kg m⁻², generating a return on investment of 104.6%. Despite these promising margins, systemic inefficiencies persist, including supply–demand asymmetry, environmental vulnerability, and limited local market access beyond niche ethnic and hospitality demand. Weak institutional coordination, the absence of certification and processing facilities, and a lack of governance integration further inhibit sectoral transformation. Based on stakeholder consultations, a three-phased strategic framework is proposed for sector development. Phase 1 (1–3 years) prioritizes production and market foundations through early-stage production improvements, technical training, consumer awareness, and pilot product development. Phase 2 (4–7 years) focuses on strengthening industry and supply chains development through producer organizations, product diversification, quality standards, and processing infrastructure. Phase 3 (8–10 years) aims to support international market integration and ecosystem expansion through certification systems, regulatory frameworks, and export-oriented value chain development. Strengthening institutional coordination, targeted investment, and private-sector participation will be essential to transform seaweed farming from a small-scale project-driven activity into a resilient and competitive component of Bangladesh’s blue economy.</p></div>","PeriodicalId":8122,"journal":{"name":"Aquaculture International","volume":"34 6","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148750806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Beyond self-recovery: dietary artichoke leaf extract accelerates tissue regeneration and redox homeostasis in deltamethrin-intoxicated Nile tilapia (Oreochromis niloticus)","authors":"Enes Üstüner,&nbsp;Mustafa Öz,&nbsp;Suat Dikel","doi":"10.1007/s10499-026-02638-4","DOIUrl":"10.1007/s10499-026-02638-4","url":null,"abstract":"<div><p>This study investigated the restorative effects of dietary artichoke (<i>Cynara scolymus</i>) leaf extract (ALE) on growth performance, hemato-biochemical parameters, oxidative stress status, and histopathological alterations in Nile tilapia (<i>Oreochromis niloticus</i>) following sublethal deltamethrin (DM) exposure. A total of 186 fish were assigned to a two-phase experimental design: an exposure phase (21 days) with waterborne deltamethrin (DM) at 1/20 of the 96-h LC₅₀ (0.0011 mg/L) and a recovery phase (30 days) during which fish were fed either a basal diet or a 2%-ALE-supplemented diet in clean water. At the end of Phase I, DM exposure markedly reduced growth performance (weight gain and specific growth rate) and feed efficiency, while inducing severe anemia, characterized by decreased red blood cell counts and hemoglobin levels (<i>P</i> &lt; 0.05). Furthermore, DM triggered pronounced hepatotoxicity and oxidative stress, evidenced by elevated serum transaminases (AST, ALT), alkaline phosphatase (ALP), malondialdehyde (MDA), and total oxidant status (TOS), alongside severe histopathological lesions in the gills, liver, and kidneys. During Phase II, spontaneous recovery in clean water was found to be insufficient for full physiological restoration. In contrast, dietary ALE supplementation notably accelerated the recovery process, effectively normalizing hemato-biochemical indices and reducing oxidative damage. ALE supplementation significantly improved growth and tissue repair compared to spontaneous recovery (<i>P</i> &lt; 0.05). These results suggest that dietary artichoke leaf extract is a potent restorative agent that can mitigate deltamethrin (a pyrethroid)-induced toxicity and enhance the physiological resilience of Nile tilapia in intensive aquaculture systems.</p></div>","PeriodicalId":8122,"journal":{"name":"Aquaculture International","volume":"34 6","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148750699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}