Aquaculture Reports最新文献

{"title":"Variations characteristics of triglyceride during various stages of ovarian development in commercial production of Penaeus monodon broodstock","authors":"Junfeng Chen ,&nbsp;Song Jiang ,&nbsp;Yuncheng Chen ,&nbsp;Yulun Wu ,&nbsp;Wei Wang ,&nbsp;Dizhi Xie ,&nbsp;Yanru Wei ,&nbsp;Qibin Yang ,&nbsp;Huirong Yang ,&nbsp;Lian Gan ,&nbsp;Shijun Chen","doi":"10.1016/j.aqrep.2026.103432","DOIUrl":"10.1016/j.aqrep.2026.103432","url":null,"abstract":"<div><div>This study investigated the role of triglyceride (TG) metabolism in ovarian development of <em>Penaeus monodon</em> broodstock. Female shrimp were fed with the model of “food organisms+commercial feed” commonly used in actual production. Serum, hepatopancreas, and ovary samples were taken at the pre-induction stage (prior to unilateral eyestalk ablation), as well as stages I, III, and V of ovarian development. The results showed that from pre-induction stage to stage I, TG content significantly increased in serum and ovary but remained stable in hepatopancreas. The hepatopancreas showed increased SFA and PUFA but decreased MUFA (all belong to free fatty acids, FFAs), while the ovary exhibited rises in these FFAs. Ovarian TG synthesis genes (<em>fas</em>, <em>srebp1</em>, <em>gpat3</em>, <em>mogat2</em>, <em>dgat1</em>, <em>lpin3</em>, <em>acc</em>, <em>scd5</em> and <em>gpd1</em>) were up-regulated, while hepatopancreatic expression of <em>gpd1</em>, <em>lpin3</em> and <em>dgat1</em> declined, and <em>mogat2</em>, <em>srebp1</em>, <em>acc</em> and <em>scd5</em> increased. Ovarian TG catabolism genes (<em>hsl</em>, <em>mgl</em>, <em>daglβ</em> and <em>dgk</em>) were elevated, and hepatopancreatic <em>hsl</em> and <em>dgk</em> increased, but <em>mgl</em> decreased. TG transport genes (<em>mttp</em> and <em>ldlr1</em>) were up-regulated in ovary, and hepatopancreatic <em>mttp</em> enhanced. From stage I to V, TG contents in serum and hepatopancreas, the above-mentioned FFAs in hepatopancreas exhibited a tendency of first reducing and then increasing, whereas the above indicators in the ovary showed a trend of first growing and then decreasing. Furthermore, genes expression related to TG synthesis, catabolism, and transport exhibited stage- and tissue-specific patterns, highlighting distinct metabolic partitioning between tissues. In conclusion, adequate supplementation of TG is essential for supporting ovarian development in shrimp broodstock.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"47 ","pages":"Article 103432"},"PeriodicalIF":3.7,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Functional evaluation of Lacticaseibacillus paracasei AAHM-LP2301 on immunity, growth, antioxidant defense, and resistance to Edwardsiella tarda infection in tilapia","authors":"Pakapon Meachasompop ,&nbsp;Putita Chokmangmeepisarn ,&nbsp;Benchawan Kumwan ,&nbsp;Phornphan Phrompanya ,&nbsp;Patcharapong Thangsunan ,&nbsp;Prapansak Srisapoome ,&nbsp;Pattanapong Thangsunan ,&nbsp;Kanokporn Saenphet ,&nbsp;Supap Saenphet ,&nbsp;Natthapong Paankhao ,&nbsp;Wararut Buncharoen ,&nbsp;Anurak Uchuwittayakul","doi":"10.1016/j.aqrep.2026.103407","DOIUrl":"10.1016/j.aqrep.2026.103407","url":null,"abstract":"<div><div>Tilapia aquaculture faces escalating disease losses under intensive farming, motivating safe antibiotic alternatives. We evaluated the probiotic potential of <em>Lacticaseibacillus paracasei</em> AAHM-LP2301, a strain isolated from healthy tilapia during a disease outbreak. Whole-genome sequencing confirmed species identity and safety indicators (3.12 Mb; GC 46.4 %; 2892 CDS). Red tilapia were fed for 30 days with cells, cell-free supernatant (Cfs), or both, then maintained 30 days on a basal diet. Growth performance and brain, muscle, and liver <em>growth hormone</em> (<em>gh</em>) expression were unaffected at Day 30 and Day 60 (<em>P</em> &gt; 0.05). In contrast, antioxidant capacity improved broadly. During feeding, catalase (CAT), superoxide dismutase (SOD), and glutathione (GSH) increased across multiple tissues compared with controls (<em>P</em> &lt; 0.05), with a CAT-centered carry-over at Day 60. Lipid peroxidation decreased by Day 60, malondialdehyde levels rebounded in controls but remained significantly lower in probiotic groups (<em>P</em> &lt; 0.05). Intestinal barrier and immune readiness were enhanced, with marked upregulation of tight-junction genes <em>muc</em>, <em>zo1</em>, <em>ocln</em>, <em>cldn</em>, and immune genes <em>nfκb</em>, <em>il1b</em>, <em>il6</em>, <em>il8</em>, <em>ifng</em>, <em>tnfa</em>, <em>hamp</em>, <em>lyz, ctl</em>, <em>c3</em> at both time points (<em>P &lt;</em> 0.05). Humoral responses increased, including lysozyme activity, bactericidal activity, and serum IgM. Challenge with <em>Edwardsiella tarda</em> demonstrated functional protection: survival rates were 70 % in Cell (relative percent survival 53.8 %) and 65 % in Cfs and Cell+Cfs (RPS 46.2 %), exceeding controls (35 % and 45 %; <em>P</em> &lt; 0.05). Principal component and correlation analyses supported coordinated antioxidant and immune profiles distinguishing probiotic groups from controls. Overall, <em>L. paracasei</em> AAHM-LP2301 is a safe, multifunctional probiotic that strengthens mucosal barriers, enhances antioxidant defenses, and increases disease resistance without compromising growth, supporting resilience-focused tilapia aquaculture.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"47 ","pages":"Article 103407"},"PeriodicalIF":3.7,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146186124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Intestinal microbiota composition and physiological characteristics in bullfrog tadpoles with gas bubble accumulation","authors":"Jingen Xu ,&nbsp;Zhilong Wang ,&nbsp;Wangbao Gong ,&nbsp;Jun Xie ,&nbsp;Guangjun Wang ,&nbsp;Kai Zhang ,&nbsp;Zhifei Li ,&nbsp;Jingjing Tian ,&nbsp;Hongyan Li ,&nbsp;Wenping Xie ,&nbsp;Yun Xia","doi":"10.1016/j.aqrep.2026.103440","DOIUrl":"10.1016/j.aqrep.2026.103440","url":null,"abstract":"<div><div>Intestinal gas bubble accumulation is a common phenomenon in bullfrog tadpoles that significantly increases mortality. The manipulation of gut microbiota composition holds potential for therapeutic applications in treating diseases. However, there remains an unexplored avenue in utilizing this manipulation to alleviate intestinal gas accumulation in bullfrog tadpoles. By using histological sectioning, physiological &amp; biochemical assays, and 16S rRNA high-throughput sequencing technology, we compared the gut microbiota composition and the physiological characteristics of host between normal tadpoles (ZC) and those with gas bubble accumulation (ZQ). The α-diversity index of gut microbiota did not significantly differ between the two groups (<em>P</em> &gt; 0.05). ZC and ZQ shared 311 operational taxonomic units (OTUs), with 143 unique OTUs in ZC, and 278 OTUs in ZQ. The tadpole intestines’ major microbes included Fusobacteria, Proteobacteria, Firmicutes, Actinobacteria, Bacteroidetes, and Verrucomicrobiota. Compared with ZC, ZQ exhibited a significantly reduced abundance of Fusobacteria and an increased abundance of Proteobacteria (<em>P</em> &lt; 0.05). At the genus level, ZQ significantly decreased the levels of <em>Cetobacterium</em> and <em>norank_f__Barnesiellaceae</em> (<em>P</em> &lt; 0.05), whereas the levels of <em>Citrobacter</em> significantly increased (<em>P</em> &lt; 0.05). The ZQ tadpoles exhibited damaged gill filaments, enlarged intercellular spaces in the intestinal epithelium, and a significant decrease in goblet cells. The ZQ tadpole liver cells displayed cell enlargement, nuclear displacement towards the periphery, and increased cytoplasmic vacuolisation. Additionally, compared with ZC, ZQ exhibited significantly elevated levels of total antioxidant capacity, malondialdehyde, acid phosphatase, and alkaline phosphatase activity in the liver. In conclusion, intestinal gas bubble accumulation in bullfrog tadpoles leads to changes in gut microbiota structure, with a decrease in beneficial bacteria and an increase in pathogenic bacteria. This disrupts intestinal homeostasis and affects liver health by exacerbating hepatocyte vacuolation and increasing oxidative stress. Our findings provide essential data for monitoring and treating this condition.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"47 ","pages":"Article 103440"},"PeriodicalIF":3.7,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146186410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of high pH on molting and calcium absorption of Pacific white shrimp (Litopenaeus vannamei)","authors":"Yiming Li ,&nbsp;Yucong Ye ,&nbsp;Ziwen Tang ,&nbsp;Zihan Zhou ,&nbsp;Zongli Yao ,&nbsp;Pengcheng Gao ,&nbsp;Yunlong Zhao ,&nbsp;Qifang Lai","doi":"10.1016/j.aqrep.2025.103274","DOIUrl":"10.1016/j.aqrep.2025.103274","url":null,"abstract":"<div><div>Rising pH in culture water has become an increasingly prominent problem in high-density aquaculture systems. Researchers have found that an increase in pH level can affect the molting process of prawns. However, studies of the effects of different pH environments on the molting and calcium absorption of Pacific white shrimp (<em>Litopenaeus vannamei</em>) are relatively scarce. The goals of this study were to explore the effects of different pH levels on the molting, calcium absorption, ion regulation, and hormone changes of this species. The results showed that high pH (9.0–9.25) significantly reduced shrimp survival, with the highest mortality observed at pH 9.25. At high pH levels, the calcium ion concentrations in hemolymph, gills, and midgut decreased and showed tissue specificity. Scanning electron microscopy results indicated that high pH damaged the shrimp shells and reduced their thickness. Energy dispersive spectroscopy further revealed that the calcium content in the shells decreased under high pH conditions. Additionally, the ion content and related ion enzyme activities decreased at high pH. The assessment of carbohydrate metabolism-related hormones showed that high pH caused an increase in thyroid-releasing hormone, while the concentrations of corticotropin-releasing hormone and insulin 2 were significantly reduced. Expression levels of genes related to molting (e.g., <em>chitin synthase</em>, <em>chitinase 5</em>, <em>ecdysteroid receptor</em>, <em>retinoid X receptor</em>, and <em>calcium-calmodulin<!--> <!-->dependent protein kinase</em> I) were significantly downregulated, while the expression of <em>molt-inhibiting hormone</em> was upregulated. In summary, we found that high pH values affect calcium absorption, ion balance, hormone regulation, and molting processes in shrimp through multiple physiological and molecular pathways. These findings provide a theoretical explanation for the changes in molting and calcium ion regulation caused by high pH in high-density shrimp farming, and they provide important references for subsequent calcium supplementation measures in shrimp aquaculture, for example by supplementing soluble calcium salts to enhance exoskeleton mineralization.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"46 ","pages":"Article 103274"},"PeriodicalIF":3.7,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145683417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization and genome analysis of a novel isolate of Chryseobacterium sp. associated with spring fish kills in gibel carp (Carassius gibelio)","authors":"Nannan Shen ,&nbsp;Ting Qin ,&nbsp;Kai Chen ,&nbsp;Jun Xie ,&nbsp;Liangkun Pan ,&nbsp;Bingwen Xi","doi":"10.1016/j.aqrep.2025.103271","DOIUrl":"10.1016/j.aqrep.2025.103271","url":null,"abstract":"<div><div>Recently, an emerging fish disease has caused massive mortality of farmed gibel carp (<em>Carassius gibelio</em>) in the early spring, and the diseased fish are associated with red heads and red mouths, which is also called “overwintering syndrome” in China. However, the exact causative agent of this fish kill is unclear. To identify the pathogen of the disease, bacterial isolations were conducted on the diseased gibel carp. The result showed that one dominant strain was identified as <em>Chryseobacterium</em> sp. YC-874, through bacterial morphology, physiological and biochemical tests, and 16S rRNA genetic sequence analysis. Histopathology observation found that the liver, spleen, kidneys, and intestines of the diseased fish had different degrees of damage. Drug sensitivity test showed that the isolate was sensitive to cotrimoxazole, moderately sensitive to enrofloxacin, and resistant to doxycycline, florfenicol, and neomycin. Furthermore, the genome of <em>Chryseobacterium</em> sp. YC-874 was sequenced and analyzed to gain an insight into its pathogenicity. The genome of YC-874 comprised of a single circular 5.32 Mb chromosome with 36.17 % GC content and encoded 4775 coding genes, among which 4643 genes were associated with the pathogenicity, virulence, and effector proteins. Although <em>Chryseobacterium</em> sp. is widely present in aquatic environments, this is the first report of <em>Chryseobacterium</em> sp. isolated from diseased <em>C. gibelio</em>. The infections of fish may be the result of the immunosuppression under spring conditions, combined with the psychrotrophic nature of bacteria.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"46 ","pages":"Article 103271"},"PeriodicalIF":3.7,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145683416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of replacing fish meal with conventional or fermented soybean meal on intestinal morphology, microbiota, and oxidative stress biomarkers in the white snook (Centropomus viridis)","authors":"Ricardo Pérez–Velasco ,&nbsp;Bruno Gómez-Gil ,&nbsp;María Cristina Chávez-Sánchez ,&nbsp;Alondra Mesina-Peña ,&nbsp;Lizeth Carolina Flores-Méndez ,&nbsp;Juan Manuel Martínez-Brown ,&nbsp;Crisantema Hernández","doi":"10.1016/j.aqrep.2025.103269","DOIUrl":"10.1016/j.aqrep.2025.103269","url":null,"abstract":"<div><div>This study examined the effect of replacing fishmeal (FM) with soybean meal (SBM) or fermented soybean meal (FSBM) on midgut micromorphology, distal gut microbiota, catalase activity, and lipid peroxidation in the white snook <em>Centropomus viridis</em>. The control diet contained 328.15 g kg ⁻¹ FM. Four experimental diets were formulated based on the control diet, replacing 25 % and 40 % FM protein with SBM (SBM25 and SBM40) or FSBM (FSBM25 and FSBM40). Juvenile snook (11.42 ± 0.83 g) were fed for 80 days in quadruplicate experimental groups (<em>n</em> = 60 fish per diet). Fish fed the SBM25 and SBM40 diets showed signs of enteritis. In addition, fish fed the SBM40 diet showed decreased catalase activity in the liver. In contrast, fish fed the FSBM25 and FSBM40 diets showed neither signs of enteritis nor reduced catalase activity. The dietary inclusion of FSBM favored a higher abundance of the genus <em>Photobacterium</em> in the distal intestinal microbiota. In addition, fish fed the FSBM25 diet showed higher dominance in the intestinal bacterial community. These results demonstrate that high dietary inclusion levels of soybean meal can affect white snook intestinal health and induce signs of oxidative stress. Furthermore, they highlight the potential of FSBM as an alternative protein source, as it does not negatively affect gut health. The results also demonstrate that FSBM can modulate the intestinal microbiota of juvenile white snook. Future research is needed to elucidate the functional role of <em>Photobacterium</em> species in the gut microbiota of <em>C. viridis</em>.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"46 ","pages":"Article 103269"},"PeriodicalIF":3.7,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145683364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental protocol for bath infection of Atlantic salmon with Tenacibaculum dicentrarchi: Aiming for target mortalities","authors":"Almendra Benavides ,&nbsp;Ruth Montero ,&nbsp;Roque Scarpa ,&nbsp;Marcos Mancilla ,&nbsp;Margareth Øverland ,&nbsp;Mónica Imarai","doi":"10.1016/j.aqrep.2025.103345","DOIUrl":"10.1016/j.aqrep.2025.103345","url":null,"abstract":"<div><div>Developing experimental protocols to establish infection models in fish is essential for identifying new and effective preventive tools to improve fish health and welfare. Tenacibaculosis, caused by <em>Tenacibaculum</em> species, is a significant concern, particularly for Atlantic salmon (<em>Salmo salar</em>). However, replicable infection models for studying this disease remain limited. In this study, we developed a reliable bath infection method for <em>T. dicentrarchi</em>, enabling targeted, controlled mortality rates. First, using flow cytometry, we accurately quantified viable bacteria that were subsequently used for bath infection. A consistent mortality of ∼24 % was achieved across experiments, even when scaling up bath infection volumes. Infected fish displayed characteristic symptoms, including ulcers, oral erosions, and hemorrhages, and PCR confirmed bacterial presence. This protocol improved reproducibility in experimental infections with <em>T. dicentrarchi</em>, supporting research on new prophylactic methods and treatments against Tenacibaculosis.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"46 ","pages":"Article 103345"},"PeriodicalIF":3.7,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145972732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pathological and microbiological assessment of hemorrhagic septicemia in cultured juvenile Russian sturgeons (Acipenser gueldenstaedtii)","authors":"Javier M. De Pablo-Moreno ,&nbsp;Blanca Chinchilla ,&nbsp;José A. Blázquez-Rangel ,&nbsp;Nicolás Aradilla ,&nbsp;Sergio Santos-López ,&nbsp;Antonio J. García-Saorín ,&nbsp;Antonio Rodríguez-Bertos","doi":"10.1016/j.aqrep.2025.103346","DOIUrl":"10.1016/j.aqrep.2025.103346","url":null,"abstract":"<div><div>Aquaculture has experienced sustained growth, now surpassing capture fisheries in global production. Among cultured species, sturgeon aquaculture has likewise expanded recently, prompting increased research and surveillance of diseases affecting this taxon. In this context, fifteen farmed Russian sturgeons (<em>Acipenser gueldenstaedtii</em>) were submitted for pathological investigation. A comprehensive study was conducted, encompassing autopsy, histopathology, parasitology, microbiology, and antimicrobial resistance analysis. Macroscopic examination revealed ulcerative lesions on the scutes, multiorgan hemorrhages, and multifocal black lesions in the liver. Histological analysis revealed a systemic granulocytic inflammatory response with associated melanomacrophage infiltration affecting the skin, gills, liver, spleen, heart, and digestive tract. Multifocal necrosis and hemorrhages were also present, consistent with hemorrhagic septicemia in fish. Microbiological identification confirmed the presence of <em>Aeromonas</em> spp., <em>Citrobacter</em> spp., and <em>Plesiomonas shigelloides</em>, all known pathogens associated with this condition in sturgeons. All three genera included isolates exhibiting resistance to at least one of the three antibiotics tested, with <em>C. braakii</em> displaying multidrug resistance. Additionally, <em>Flavobacterium succinicans</em> was also detected, representing the first report of this bacterium in sturgeons associated with skin ulcers. In conclusion, this study provides a detailed characterisation of hemorrhagic septicemia in Russian sturgeons, with pathological examination proving essential for identifying systemic lesions and validating microbiological findings. The detection of antimicrobial resistance raises concerns about the efficacy of current therapeutic options in potential future outbreaks, emphasising the importance of rapid and integrated diagnostic approaches, continued surveillance, and the implementation of effective preventive health management strategies in aquaculture.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"46 ","pages":"Article 103346"},"PeriodicalIF":3.7,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145972814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A high-density SNP array tailored for selectively bred Arctic charr (Salvelinus alpinus)","authors":"Christos Palaiokostas,&nbsp;Martin Johnsson","doi":"10.1016/j.aqrep.2026.103369","DOIUrl":"10.1016/j.aqrep.2026.103369","url":null,"abstract":"<div><div>SNP arrays are indispensable tools for integrating genomic information into breeding programs. A SNP array for Nordic Arctic charr (<em>Salvelinus alpinus</em>) containing approximately 600,000 SNPs was developed from variants detected in Swedish, Norwegian and Icelandic farmed populations. In the current study, an in-depth analysis of the genetic diversity status of the Swedish population was conducted using high-quality SNPs. Animals from three non-overlapping year classes were genotyped (n = 382). Following quality control 169,873 SNPs were retained for downstream analysis. A principal components analysis (PCA) did not reveal any underlying genetic structure, in agreement with the background information of this population. A linkage disequilibrium (LD) decay analysis indicated a strong to moderate LD up to a physical distance of 300 kbp. In parallel, the LD estimates were used to estimate the effective population size (Ne), which declined from 260 (15 generations ago) to approximately 20 over the last four generations. Furthermore, runs of homozygosity (ROH) were detected, and inbreeding coefficients were estimated based on them. The median values of the inbreeding coefficients for the three year classes ranged from 14.4 % to 15.9 %. Nevertheless, those inbreeding estimates were primarily based on short ROH (≤ 4Mbp), reflecting non-recent shared ancestry. The median inbreeding coefficients based on ROH longer than 4 Mbp, on the other hand, ranged between 8.3 % and 9.7 %. The produced SNP array is expected to be instrumental in the transition of the Nordic Arctic charr industry to the genomic era, allowing, among other things, for a more efficient management of the genetic diversity of captive populations.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"46 ","pages":"Article 103369"},"PeriodicalIF":3.7,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145972973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Salinity impacts on aquaponic Kale Winterbor (Brassica oleracea): Production, water quality, and sensory properties","authors":"Jill C. Fisk ,&nbsp;Jonathan Kershaw ,&nbsp;Leo J. Fleckenstein ,&nbsp;Andrew J. Ray","doi":"10.1016/j.aqrep.2025.103332","DOIUrl":"10.1016/j.aqrep.2025.103332","url":null,"abstract":"<div><div>Aquaponics describes recirculating aquaculture systems that include plants to remove excess nutrients. In inland brackish water aquaculture, salt is a major cost; therefore, water reuse is crucial for sustainability. Utilizing aquaponics may allow producers to limit brackish water discharge while producing a marketable crop, but information on suitable plant species and marketability is limited. Kale is a well-known leafy green that has shown some degree of salt tolerance. However, the performance of kale in brackish aquaponic production conditions and the impacts on consumer perceptions are unknown. This study’s aims were to evaluate kale’s tolerance to artificial seawater, determine effects of kale on water quality, and quantify consumer perceptions of the resulting product. Kale was grown at 0, 5, 10, 15 and 20 salinities during a 23-day experiment. Kale removed nitrogen and reduced phosphorus within two weeks, although concentrations of N, P, Ca and K in leaf tissue decreased as salinity increased. Kale survival was 100 % in all treatments; however, growth was significantly reduced as salinity increased. A consumer taste test (n = 112) reported saltiness ratings increased in a dose-respondent manner that corresponded with higher concentrations of Na in plant tissues. The 5 salinity sample was liked significantly more than the 0 (control) salinity, and no samples were liked less than the control. Informing consumers about the production method improved willingness to pay by 38 %. This study reveals the potential of kale to help manage nutrient build up in brackish water aquaculture while producing a marketable crop.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"46 ","pages":"Article 103332"},"PeriodicalIF":3.7,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145973051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}