Aquaculture, Fish and Fisheries最新文献

{"title":"FishMet: A Digital Twin Framework for Appetite, Feeding Decisions and Growth in Salmonid Fish","authors":"Sergey Budaev,&nbsp;Giovanni M. Cusimano,&nbsp;Ivar Rønnestad","doi":"10.1002/aff2.70064","DOIUrl":"https://doi.org/10.1002/aff2.70064","url":null,"abstract":"<p>Salmonids are important fish species in aquaculture in countries in the temperate zone. Optimisation of feeding in next-generation precision fish farming requires developing models for decision support and process control. Black box ML and AI models are often very efficient but have drawbacks, such as requiring large amount of training data and reduced performance in novel situations where no data are available. Thus, developing realistic process models of fish appetite, feeding decisions, feed intake, energetics and growth is necessary. Such models are essential for predicting fish performance, for example, feed intake, waste from uneaten feed and faeces, growth, in novel ‘what if’ scenario testing. We have built a conceptual model based on a review of major neurophysiological mechanisms and feedback loops controlling appetite and food intake in fish. Building on this, we have developed the FishMet model: a new extensible stochastic simulation framework that represents the basic feedback loops controlling appetite, feeding decisions, energy budget and growth in salmonid fish. The appetite and feeding decision model in FishMet is the novel advance, while the bioenergetic part follows the established theory. The model is supported by server-based components and open API for data assimilation and on-demand model execution that allows to use FishMet as a digital twin. We demonstrate relatively good prediction of stomach and gut digesta transit and food intake in the rainbow trout <i>Oncorhynchus mykiss</i>. The digital twin also demonstrated good prediction of growth and feeding efficiency in a pilot scale experiment on the Atlantic salmon <i>Salmo salar</i>. We discuss the concept of the digital twin and the directions of further development of the model as an applied predictive tool.</p>","PeriodicalId":100114,"journal":{"name":"Aquaculture, Fish and Fisheries","volume":"5 2","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aff2.70064","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143852855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of Stocking Densities on Growth and Production Performance of Mystus cavasius in Bottom Clean Aquaculture System","authors":"Md. Rabiul Awal,&nbsp;A. K. M. Saiful Islam,&nbsp;Md. Moshiur Rahman,&nbsp;Asma Jaman,&nbsp;Md. Harunor Rashid,&nbsp;Anuradha Bhadra","doi":"10.1002/aff2.70063","DOIUrl":"https://doi.org/10.1002/aff2.70063","url":null,"abstract":"<p>Optimizing the stocking density in bottom clean aquaculture is essential for promoting fish growth, economic sustainability and enhancing the general well-being of fish. Three stocking densities (low, medium and high) were tested in a bottom clean aquaculture system to evaluate the growth efficiency, nutritional values, blood parameters, and cost-effectiveness of <i>Mystus cavasius</i>. Fish stocking rates in tanks were 666 (low density), 1000 (medium density) and 1330 fish/m³ (high density) with an initial fish weight of 0.49 ± 0.19 g, 0.48 ± 0.18 g and 0.50 ± 0.20 g, respectively. The results suggested that the water quality assessment was within acceptable limits for fish growth. The study revealed significantly higher (<i>p</i> &lt; 0.05) final weight, weight gain, percentage weight gain, average daily weight gain, specific growth rate, survival rate and feed conversion ratio (FCR) in the low-density treatment. However, the total fish yield and profit were significantly higher in the high-density treatment compared to the medium-density and low-density treatments, resulting in a higher net profit. Nutrient values were similar across all treatments. The length–weight relationship analysis indicated a negative allometric growth (<i>b</i> &lt; 3) with no significant variation (<i>p</i> &gt; 0.05) among treatments. The blood glucose and haemoglobin levels ranged from 129.50 to 157.75 mg/dL and 8.40 to 8.80 g/dL, respectively, among treatments indicating optimum levels. This study suggests that the ideal density for <i>M. cavasius</i> in tank-based bottom clean aquaculture is 1330 fish/m³. However, further research is necessary to investigate higher stocking densities for optimal production.</p>","PeriodicalId":100114,"journal":{"name":"Aquaculture, Fish and Fisheries","volume":"5 2","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aff2.70063","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nocardia seriolae and Streptococcus iniae Co-Infection in Cultured Fourfinger threadfin, Eleutheronema tetradactylum, in Singapore","authors":"Biyun Ching,&nbsp;Xuan Hui Teo,&nbsp;Christine Hui En Lee,&nbsp;Alvin Wee,&nbsp;Angeline Lua,&nbsp;Yih Hong Tay,&nbsp;Wai Kwan Wong,&nbsp;Charlene Judith Fernandez,&nbsp;Diana Chee,&nbsp;Kelvin Lim,&nbsp;Siow Foong Chang","doi":"10.1002/aff2.70038","DOIUrl":"https://doi.org/10.1002/aff2.70038","url":null,"abstract":"<p>Between April and May 2021, two batches of diseased fourfinger threadfin (<i>Eleutheronema tetradactylum</i>) from an open-sea net cage farm were submitted for diagnostic post-mortem examination. Necropsy and histopathology identified necrosis within multiple organs with intralesional Gram-positive, branching, beaded filamentous bacilli suggestive of <i>Nocardia</i> species. Intralesional Gram-positive cocci were also observed within the heart sections. These Gram-positive bacilli and cocci were subsequently confirmed to be <i>Nocardia seriolae</i> and <i>Streptococcus iniae</i>, respectively, through isolation, PCR and sequencing. This is the first report from Singapore of <i>N. seriolae</i> and <i>S. iniae</i> co-infection and outbreak in cultured fourfinger threadfin.</p>","PeriodicalId":100114,"journal":{"name":"Aquaculture, Fish and Fisheries","volume":"5 2","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aff2.70038","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143786856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Understanding the Application of Plant Extracts in Wound Healing of Fish: A Comprehensive Review","authors":"Christian Larbi Ayisi,&nbsp;Samuel Ayeh Osei,&nbsp;Gertrude Dzifa Mensah,&nbsp;Cecilia Asemah","doi":"10.1002/aff2.70057","DOIUrl":"https://doi.org/10.1002/aff2.70057","url":null,"abstract":"<p>This review explores the latest developments in the use of plant extracts to promote fish wound healing. Healing from wounds is an essential part of maintaining fish health, especially in aquaculture where injuries can result in large losses. The potential therapeutic benefits of plant extracts, such as their antimicrobial, anti-inflammatory and tissue-regenerating capabilities, have drawn attention. This paper presents an overview of the state of the art in fish wound-healing research, focusing on important plant extracts. It discusses these extracts' mechanisms of action, how well they work to promote wound healing, and what influences how effective they are. The review also examines future directions and possible obstacles in this area, highlighting the necessity of more clinical trials and standardised research methodologies to validate the use of plant extracts for fish wound healing.</p>","PeriodicalId":100114,"journal":{"name":"Aquaculture, Fish and Fisheries","volume":"5 2","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aff2.70057","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Post-Release Performance of Hatchery-Reared Tibetan Fish Schizopygopsis younghusbandi Juveniles in a Tributary of Lhasa River","authors":"Benhe Zeng,&nbsp;Lin Wang,&nbsp;Tingbing Zhu,&nbsp;Ning Wang,&nbsp;Rongzhu Zhou,&nbsp;Jinlin Wang,&nbsp;Qiming Wang,&nbsp;Yanfei Gao","doi":"10.1002/aff2.70060","DOIUrl":"https://doi.org/10.1002/aff2.70060","url":null,"abstract":"<p>Stock enhancement is essential for China's fishery resource conservation. However, research evaluating the stocking effectiveness of plateau fish species is scare. <i>Schizopygopsis younghusbandi</i>, a Tibetan fish endemic to the middle Yarlung Zangbo River, is currently facing a decline in resource availability. In the present study, an 11-month mark–release–recapture experiment was conducted to evaluate the post-release performance of hatchery-reared juvenile <i>S. younghusbandi</i> released into a tributary of the Lhasa River from September 2023 to August 2024. The overall recapture rate of the released fish was 8.04%, with 92.0% of the individuals being recaptured within 10 days of their release. As the time since release increased, the occurrence rate of the released fish at various capture sites demonstrated a declining trend. The last recapture of a released fish occurred 248 days post-release, demonstrating that the experimental fish can successfully overwinter in the field environment. The average weight of the released fish increased by 66.4% over the 11 months following their initial release. The condition factors of the released fish exhibited notable variations, with a significant decline during the winter months. Changes in gut fullness indicate that the released fish resumed feeding as early as the second day post-release and maintained feeding activity throughout the subsequent experimental period. The movement patterns of the released fish reveal that they primarily dispersed upstream of the release site during the early stages; however, after 8 days of their release, they predominantly moved downstream. The population contribution rate of the released fish ranged from 0.36% to 1.09% over the 2–8 months following their release. The results of this study not only enhance our understanding of the adaptability of hatchery-reared plateau fish to wild environments but also provide a reference for the management and effectiveness evaluation of plateau fish stock enhancement programs.</p>","PeriodicalId":100114,"journal":{"name":"Aquaculture, Fish and Fisheries","volume":"5 2","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aff2.70060","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Updated Life History Traits of Narrow-Barred Spanish Mackerel, Scomberomorus commerson (Lacépède, 1800) of UAE Waters in the Southeastern Arabian Peninsula","authors":"Mohamed AlMusallami,&nbsp;Mark Dimech,&nbsp;Franklin Francis,&nbsp;Waleed Hamza,&nbsp;Aaron C. Henderson,&nbsp;Sabir Bin Muzaffar,&nbsp;Giuseppe Scarcella,&nbsp;Ahmed Esmaeil Alsayed Alhashmi,&nbsp;Mohamed Hasan Ali Al Marzooqi,&nbsp;Dario Pinello","doi":"10.1002/aff2.70059","DOIUrl":"https://doi.org/10.1002/aff2.70059","url":null,"abstract":"<p>The narrow-barred Spanish mackerel, <i>Scomberomorus commerson</i>, is an economically important fish species in the Arabian Peninsula. This study aims to revisiting its life history traits by data collected in a 15-month monitoring program (January 2019–May 2020) in UAE waters. Fork length ranged from 30.5 to 132 cm. Growth parameters of <i>k</i> were 0.14 and 0.15, <i>L</i>_inf was 128.9 and 135.4 cm, and <i>t</i>₀ was −2.4 and −2.3 for males and females, respectively. The <i>L</i>m₅₀ were 78.7 and 69.7 cm FL, and Am₅₀ were 2.0 and 1.8 years for females and males, respectively. Gonadosomatic index showed that the spawning season had started in March and ended in June with a clear peak in April. Mortality estimates were 0.69 year⁻¹ for total mortality, 0.43 year⁻¹ for fishing mortality, and 0.26 year⁻¹ for natural mortality. The mean size and age at first capture were 43.4 cm FL and 1.8 years, respectively. The spawning biomass ratio was estimated at 20.5%. In the study period of 2019–2020, high exploitation rate especially on juvenile fish capture was recommended to reduce for long-term sustainability.</p>","PeriodicalId":100114,"journal":{"name":"Aquaculture, Fish and Fisheries","volume":"5 2","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aff2.70059","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143689985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of Annual Thermal Regime on Growth Trajectories of Native Age-0 Brook Trout (Salvelinus fontinalis)","authors":"Chase M. Daiek,&nbsp;Jill B. K. Leonard","doi":"10.1002/aff2.70053","DOIUrl":"https://doi.org/10.1002/aff2.70053","url":null,"abstract":"<p>The rapidly increasing temperatures of aquatic systems associated with climate change represent a novel threat to populations of brook trout (<i>Salvelinus fontinalis</i>), and much uncertainty remains about the potential of these populations to acclimate, adapt or compensate for such changes. The current study evaluated growth patterns of young-of-the-year brook trout in two tributaries with dramatically different annual thermal regimes. Using a common garden design, we evaluated the effect of variable incubation temperatures on embryo size, developmental phenology, yolk sac allocation, hatch timing and size at hatch under laboratory conditions. The results of the current study provide evidence for plasticity in the developmental response of brook trout to withstand moderate effects of climate change. The results of the field studies demonstrated wide variability among populations, individuals and cohorts. Laboratory studies suggested that population differences were largely mitigated by the effect of the environment and that incubation conditions appeared to have a strong moderating effect on population differences in early development.</p>","PeriodicalId":100114,"journal":{"name":"Aquaculture, Fish and Fisheries","volume":"5 2","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aff2.70053","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143689165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of Biometric and Breeding Biology of the Striped Snakehead Channa striata in the Haor Region: Conservation and Effective Management","authors":"Md. Rabiul Awal,&nbsp;KOTB A. Attia,&nbsp;Maliha Khanom,&nbsp;Md. Ashikur Rahman,&nbsp;Md. Saiful Islam,&nbsp;Arif Ahmed Mohammed,&nbsp;Yaser M. Hafez,&nbsp;Yahia Mahmud,&nbsp;Anuradha Bhadra","doi":"10.1002/aff2.70058","DOIUrl":"https://doi.org/10.1002/aff2.70058","url":null,"abstract":"<p>This study was investigated to assess growth patterns, sex ratio, first sexual maturity, gonadosomatic index (GSI), fecundity and ovarian development of <i>Channa striata</i> in the Haor of Kishoreganj, Bangladesh, for long-term management and conservation purposes. The results of the study indicated that the female fish showed positive allometric growth (<i>b</i> &gt; 3), whereas the male showed negative allometric growth (<i>b</i> &lt; 3). There were no significant differences (<i>p</i> &gt; 0.05) in the Fulton's condition factor (<i>C_F</i>) and relative condition factor (<i>K_n</i>) between the sexes. The <i>K_n</i> value indicates that the fish is in excellent health condition. The chi-square test indicated a slight deviation from a 1:1 sex ratio for the sampled months, with a statistically significant difference (<i>χ</i>² = 0.04, <i>p</i> &lt; 0.05). The findings indicated that 50% of female and male fish reached sexual maturity at lengths of 29.30 and 26.74 cm, respectively. The results showed that both sexes reached their maximum GSI value in June, whereas October recorded the lowest value. The findings showed that the mean absolute fecundity was 12,049 during the study period, with June showing the peak value (28,768) and December showing the lowest value (3128). The microscopic study of gonadal tissues identified five separate stages of gonadal development. This study will contribute to comprehending the reproductive traits of <i>C. striata</i> and further contribute to sustainable fisheries management in the Haor region.</p>","PeriodicalId":100114,"journal":{"name":"Aquaculture, Fish and Fisheries","volume":"5 2","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aff2.70058","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143638983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Systematic Literature Review Identifying Core Genera in the Gut Microbiome of Rainbow Trout (Oncorhynchus mykiss) and Species-level Microbial Community Analysis Using Long-Read Amplicon Sequencing","authors":"Mio Takeuchi,&nbsp;Kazuhiro Sugahara","doi":"10.1002/aff2.70054","DOIUrl":"https://doi.org/10.1002/aff2.70054","url":null,"abstract":"<p>Rainbow trout (<i>Oncorhynchus mykiss</i>) is an important fish in global aquaculture. Various feed additives to suppress disease or reduce fish meal use have been studied. These manipulations influence the gut microbiome, which is considered to be linked to host health. However, a consensus remains to be established on the healthy gut microbiome composition. This study aimed to identify core genera in the gut of rainbow trout via a systematic review of 39 articles and determine candidate core species using long-read amplicon sequencing targeting the full-length 16S rRNA gene. <i>Mycoplasma</i>, <i>Aeromonas</i>, <i>Clostridium</i>, <i>Deefgea</i>, <i>Streptococcus</i>, <i>Cetobacterium</i>, <i>Lactobacillus</i>, <i>Lactococcus</i>, <i>Methylobacterium</i>, <i>Corynebacterium</i>, <i>Shewanella</i> and <i>Staphylococcus</i> were identified as core genera in the autochthonous gut microbiome of rainbow trout based on the systematic review. In addition, through long-read amplicon sequencing, we identified candidate core species of the core genera of rainbow trout, such as <i>Latilactobacillus sakei</i>, <i>Clostridium gasigeness</i>, <i>Deefgea piscis</i> and <i>Pseudomonas yamanorum</i>. These findings may ultimately contribute to the development of manipulation technologies in aquaculture.</p>","PeriodicalId":100114,"journal":{"name":"Aquaculture, Fish and Fisheries","volume":"5 2","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aff2.70054","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143646176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Self-Reproducing Population of Common Carp Cyprinus carpio at 59°16'N in Sweden","authors":"Joacim Näslund,&nbsp;Mikael Andersson","doi":"10.1002/aff2.70056","DOIUrl":"https://doi.org/10.1002/aff2.70056","url":null,"abstract":"<p>In this brief report, we report on the occurrence of young-of-the-year common carp, as well as older juveniles, in a golf course irrigation pond in Stockholm County, Sweden (59°16′40.4″N 18°28′0.6″E). This documents a case of natural reproduction of the regularly stocked non-native carp in Swedish waters, near the northern limit for the stocking operations. Stocking of common carp in Sweden is generally conducted under assumptions that reproduction is not possible due to low spring-time water temperatures not meeting the reproductive requirements of common carp. Our observation suggests that risks for ecological impacts through the establishment of self-reproducing populations of common carp can be higher than previously assumed. We recommend that this observation is considered when deciding on permits for future carp stocking in Sweden.</p>","PeriodicalId":100114,"journal":{"name":"Aquaculture, Fish and Fisheries","volume":"5 2","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aff2.70056","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143571211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}