Aquaculture Reports最新文献

{"title":"Effects of different dietary zinc sources on growth performance, muscle texture, and intestinal immunity in Mandarin Fish (Siniperca chuatsi)","authors":"Xiaolu Yan ,&nbsp;Lingcheng Pan ,&nbsp;Zhigang Deng ,&nbsp;Yabin Wu ,&nbsp;Dianchao Gu ,&nbsp;Lei Yan ,&nbsp;Yushuang Chen ,&nbsp;Da Zhou ,&nbsp;Fubao Wang ,&nbsp;Min Zhao ,&nbsp;Li Luo","doi":"10.1016/j.aqrep.2025.102877","DOIUrl":"10.1016/j.aqrep.2025.102877","url":null,"abstract":"<div><div>The study aims to examine the effects of different dietary zinc sources on growth performance, muscle texture, and intestinal immunity in Mandarin Fish (<em>Siniperca chuatsi</em>), a basic diet (control group) and five experimental diets with additional 40 mg/kg of Zn designed in this experiment. Five Zn sources are ZnSO₄, Zn-RAA (rice protein amino acid chelate zinc), Zn-SAA (soy protein amino acid chelate zinc), Zn-Met (1:1), and Zn-Met (2:1), respectively. A total of 270 <em>S. chuatsi</em> (initial weight 67.46 ± 2.02 g) were divided into six groups, each with three replicates of 15 fish, for a 49-day growth trial. Results showed that all zinc sources increased growth and feed conversion. Zn-Met (2:1) had the best effect, followed by Zn-Met (1:1), Zn-RAA, Zn-SAA, and ZnSO₄ had the least effect. The Zn-Met (2:1) group significantly enhanced muscle texture, optimized myofiber structure, and increased Zn deposition and collagen content in muscle. It also elevated intestinal Cu/Zn-SOD, T-SOD, and T-AOC activities, reduced MDA levels, and upregulated the mRNA expression of antioxidant genes like <em>cu/zn-sod, nrf2</em>, <em>gpx1</em>, and <em>cat</em>. This group improved intestinal digestive and absorptive enzymes activities, reduced intestinal damage and inflammation, decreased Endotoxin and D-LA levels, and increased IgM content. Proinflammatory cytokines (<em>il-8, il-1β, tnf-α</em>) were downregulated, while the anti-inflammatory gene <em>tgf-β1a</em> was upregulated. 16S rRNA sequencing showed an increase in the relative abundance of beneficial bacteria and α-diversity. Overall, amino acid-chelated zinc outperforms zinc sulfate in promoting growth, improving muscle quality, antioxidant and immune functions, and enhancing intestinal health, with Zn-Met (2:1) having the best effects.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"43 ","pages":"Article 102877"},"PeriodicalIF":3.2,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071905","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 different natural bivalve diets on the growth performance and nutritional composition of juvenile Neptunea arthritica cumingii","authors":"Yongxin Sun ,&nbsp;Shanshan Zhang ,&nbsp;Liang Qu ,&nbsp;Hualin Li ,&nbsp;Weiming Teng ,&nbsp;Dacheng Li ,&nbsp;Chong Zhao ,&nbsp;Qingzhi Wang","doi":"10.1016/j.aqrep.2025.102873","DOIUrl":"10.1016/j.aqrep.2025.102873","url":null,"abstract":"<div><div>A four-week feeding trial was conducted to identify suitable natural bivalve diets for the growth of juvenile <em>Neptunea arthritica cumingii</em>. The trial aimed to evaluate the effects of various bivalve species on the growth performance and nutritional composition of the juvenile snails. The snails used in the trial had an average weight of 0.48 ± 0.05 g. The tested bivalve species included <em>Sinonovacula constricta</em>, <em>Mactra membranacea</em>, <em>Crassostrea gigas</em>, <em>Mizuhopecten yessoensis</em>, <em>Ruditapes philippinarum</em>, and <em>Hyriopsis cumingii</em>. The results indicated that, except for the <em>C. gigas</em> group, all other groups achieved a survival rate of 100 %. The juvenile snails fed with <em>S. constricta</em> exhibited the highest final body weight and specific growth rate, significantly surpassing those in the <em>C. gigas</em>, <em>M. yessoensis</em>, and <em>H. cumingii</em> groups (<em>P</em> &lt; 0.05), with the lowest feed conversion ratio observed in the <em>S. constricta</em> group. In terms of digestive enzyme activity, the <em>R. philippinarum</em> group showed significantly higher gastric protease and amylase activities compared to the other groups (<em>P</em> &lt; 0.05), while the <em>H. cumingii</em> group had the highest lipase activity among all groups. Correlation analysis revealed that the soft tissue of juvenile <em>N. arthritica cumingii</em> fed with <em>M. yessoensis</em> exhibited a very strong correlation with seven amino acids present in the scallops. Similarly, the soft tissue of juvenile whelks fed with <em>S. constricta</em> showed a very strong correlation with seven polyunsaturated fatty acids found in the clams. Among the six natural diets tested, measures of <em>S. constricta</em> is recommended as a superior natural bivalve diet for juvenile <em>N. arthritica cumingii</em>, based upon feed utilization, growth performance, and nutritional enhancement.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"43 ","pages":"Article 102873"},"PeriodicalIF":3.2,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144069415","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 dietary sharp-leaf galangal (Alpinia oxyphylla) fruit extract on growth, muscle composition, immune responses, gut flora, and disease resistance in juvenile red claw crayfish (Cherax quadricarinatus)","authors":"Chi Xu ,&nbsp;Yao-Peng Lu ,&nbsp;Ze-Long Zhang ,&nbsp;Chen-Guang Hao ,&nbsp;Zi-Hang Yu ,&nbsp;Jun-Tao Li ,&nbsp;Pei-Hua Zheng ,&nbsp;Xiu-Xia Zhang ,&nbsp;Xiu-Ying Yang ,&nbsp;Hui Guo ,&nbsp;Jian-An Xian","doi":"10.1016/j.aqrep.2025.102870","DOIUrl":"10.1016/j.aqrep.2025.102870","url":null,"abstract":"<div><div>Sharp-leaf galangal (<em>Alpinia oxyphylla</em>) is one of the four major southern medicinal herbs in China and exhibits various bioactive characteristics, such as anti-inflammatory properties, immunomodulatory effects, and antioxidant activity. In this study, we assessed the effects of <em>A. oxyphylla</em> fruit extract (AOE) on the overall performances of red claw crayfish (<em>Cherax quadricarinatus</em>). Crayfish (0.81 ± 0.02 g) were treated with diets at various AOE levels (0 (CG), 0.5 (AOE1), 1 (AOE2), 3 (AOE3), 5 (AOE4), and 7 (AOE5) g/kg) for 56 days. The groups supplemented with 1–3 g/kg AOE exhibited significantly higher specific growth rates and weight gain rates compared to the control group. Lipase and trypsin activities in the AOE2 and AOE3 groups were significantly increased compared to the CG group. Dietary AOE could increase SOD, T-AOC, GPx, PO, AKP, and ACP activities and decrease MDA content of crayfish. Dietary AOE significantly induced the expression of ecCu, Zn-SOD, SOD, Trx1, ALF, C-LZM, GPx and Se-GPx mRNA of crayfish. Gut microbiota analysis revealed that the dominant bacterial groups in crayfish were Proteobacteria, Firmicutes, and Bacteroidetes. At the genus level, the most prevalent taxa were <em>Hypnocyclicus</em>, <em>Cloacibacterium</em>, and <em>Aeromonas</em>. The survival rates of crayfish under <em>A. hydrophila</em> infection in the AOE2 and AOE3 groups were significantly higher than those in the CG group. The optimum level of dietary supplementation was 1–3 g/kg AOE in juvenile <em>C. quadricarinatus</em>.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"43 ","pages":"Article 102870"},"PeriodicalIF":3.2,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071902","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 phytoplankton and zooplankton feeding on fatty acid dynamics in the early development of the mangrove red crab Ucides occidentalis","authors":"Juletzy Reyes ,&nbsp;Daniel Rodríguez-Pesantes ,&nbsp;Stanislaus Sonnenholzner ,&nbsp;Julia Nieto-Wigby","doi":"10.1016/j.aqrep.2025.102872","DOIUrl":"10.1016/j.aqrep.2025.102872","url":null,"abstract":"<div><div>The nutritional quality, biochemical nature, and fatty acid (FA) composition of live feed play a crucial role in influencing the larval performance of crabs. This study examines the impact of FA content in three brown microalgae (<em>Chaetoceros gracilis</em>, <em>Chaetoceros muelleri</em>, and <em>Pavlova lutheri</em>) as well as two zooplanktonic organisms (<em>Brachionus plicatilis</em> and <em>Artemia franciscana</em>) on the FA composition and dynamics, metamorphosis rate, and survival of mangrove red crab <em>Ucides occidentalis</em> larvae. Spawning was induced during the lunar peak phase. Zoea I larvae were distributed into five 1000-L tanks and stocked at a density of 0.05 larvae.mL⁻¹. Culture was performed at a salinity of 28.0 g.kg⁻¹ and 30.0 ± 0.5°C. The larval culture lasted 18 days with a 3-day interval for each molt, a growth rate of 6.4 ± 0.04 %·day⁻¹ (per triplicate, n = 30), and a final survival of 9.5 ± 2.5 %. Notably, Zoea larvae exhibited the highest amount of omega-9 throughout the larval stages (between 26 and 40 %, particularly oleic acid). Furthermore, zooplanktonic feed demonstrated a significant impact on the FA profile of larvae, encouraging the emergence of eicosapentaenoic acid (between 5.23 and 10.14 %), docosahexaenoic acid (between 1.70 and 3.88 %), and arachidonic acid (between 0.79 and 4.26 %) from zoea II onwards. We determined the importance of omega-9, palmitic, stearic, palmitoleic and long-chain polyunsaturated fatty acids (particularly EPA), so we suggest their inclusion and thus meet specific dietary needs. These findings shed light on the dynamics of AF during larval development of <em>U. occidentalis</em>, suggesting the potential to develop more efficient combinations of live feed to meet its nutritional requirements, thereby optimizing seed production for ecological restoration or aquaculture.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"43 ","pages":"Article 102872"},"PeriodicalIF":3.2,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071901","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 Haematococcus pluvialis powder in the diet of golden pompano (Trachinotus ovatus) on the growth performance, pigmentation, hepatic and intestinal health, antioxidant capacity and immunity","authors":"Jieping Liu ,&nbsp;Ziqiao Wang ,&nbsp;Yongkang Chen ,&nbsp;Yucai Guo ,&nbsp;Xiaoming Li ,&nbsp;Yanmei Li ,&nbsp;Peinan Zhang ,&nbsp;Xiangyan Hou ,&nbsp;Chun Luo ,&nbsp;Wei Zhao ,&nbsp;Jin Niu","doi":"10.1016/j.aqrep.2025.102875","DOIUrl":"10.1016/j.aqrep.2025.102875","url":null,"abstract":"<div><div><em>Haematococcus pluvialis</em> enriched natural astaxanthin is widely used as a functional additive in the farming industry. The objective of this study was to evaluate the effects of dietary supplementation with <em>H. pluvialis</em> powder on growth performance, pigmentation, hepatic and intestinal morphology, antioxidant capacity, and immunity of golden pompano (<em>Trachinotus ovatus</em>). Six isonitrogenous and isolipidic experimental diets, which were formulated to contain 0 % (D1), 0.02 % (D2), 0.04 % (D3), 0.08 % (D4), 0.16 % (D5), and 0.32 % (D6) <em>H. pluvialis</em> powder, were used in the 54-day feeding trial. <em>T. ovatus</em> fed with 0.16 % <em>H. pluvialis</em> showed the greatest levels of FBW, WGR, SGR, and FI. Additionally, across all treatments, the anal fin in the fish given 0.16 % and 0.32 % <em>H. pluvialis</em> displayed increased yellowness (b*), while the tail fin's redness (a*) was considerably higher in the 0.08 % and 0.16 % <em>H. pluvialis</em> treatments. The hepatic morphology result showed that <em>H. pluvialis</em> didn’t influence the health status of the liver, and the activity of CAT decreased in all <em>H. pluvialis</em>-supplemented groups. Compared to other concentrations, the 0.16 % and 0.32 % <em>H. pluvialis</em> groups increased intestinal villi height and amylase activity. The hepatic gene expression showed that 0.16 % <em>H. pluvialis</em> upregulated the expression of kelch ECH-associated protein 1 (<em>keap1</em>), glutathione peroxidase (<em>gsh-px</em>), proliferator-activated receptor α (<em>pparα</em>), interleukin-10 (<em>il-10</em>), and transforming growth factor β (<em>tgf-β</em>), meanwhile, the mRNA level of complement component 4 (<em>c4</em>), superoxide dismutase (<em>sod</em>), and sterol regulatory element-binding protein 1 (<em>srebp1</em>) increased in the intestine. Overall, dietary supplementation with 0.16 % <em>H. pluvialis</em> could improve growth performance, pigmentation in fins, digestive capacity of the intestine, and gene expression related to antioxidant capacity, immunity, and lipid metabolism in <em>T. ovatus</em>.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"43 ","pages":"Article 102875"},"PeriodicalIF":3.2,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071903","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 estradiol exposure on lipid metabolism in male and female sea cucumber Apostichopus japonicus","authors":"Shuangyan Zhang ,&nbsp;Libin Zhang ,&nbsp;David Gonçalves ,&nbsp;Jialei Xu","doi":"10.1016/j.aqrep.2025.102881","DOIUrl":"10.1016/j.aqrep.2025.102881","url":null,"abstract":"<div><div>Lipids are important energy storage nutrients and signalling molecules for reproduction. Steroid hormones, including estradiol (E₂), have been shown to play a key regulatory role in lipid metabolism in vertebrates. However, not much is known on the action of sex steroids in lipid metabolism in invertebrates. This study investigated the impact of exogenous E₂ administration in lipid metabolism of male and female sea cucumber <em>Apostichopus japonicus</em>. Control females had higher crude lipid content in the body wall, but not in the intestines, as compared to control males. E₂ administration significantly reduced the total lipid content in the intestine and body wall of females, but not males. The analysis of intestinal metabolites and gene expression of <em>A. japonicus</em> showed that E₂ significantly affected the expression of genes and the levels of metabolites related with lipid metabolism pathway. The metabolism of sex hormones, triglycerides and fatty acids in females was more active as compared to males. The fatty acid degradation and glycerophospholipid metabolism pathways were disturbed by E₂ administration in males. E₂ significantly inhibited the activity of catalase (CAT) in the coelomic fluid, and it is speculated that E₂ may have disrupted lipid metabolism by inducing oxidative imbalance in males by targeting the glycerophospholipid metabolism pathway. The study confirms that sex steroids play a significant role in regulating physiological functions in echinoderms and, in particular, that E₂ might modulate lipid metabolism, as described for vertebrates. The results also suggest that exogenous administration of sex steroids could be used as a tool to regulate reproductive function to improve the rearing of <em>A. japonicus</em>.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"43 ","pages":"Article 102881"},"PeriodicalIF":3.2,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071900","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":"Dietary bile acids alleviate dextran sulfate sodium-induced enteritis in juvenile leopard coral grouper (Plectropomus leopardus)","authors":"Shengpeng Wang ,&nbsp;Longting Zhang ,&nbsp;Jie Huang ,&nbsp;Qingcong Fu ,&nbsp;Dingqian Guo ,&nbsp;Yujie Gao","doi":"10.1016/j.aqrep.2025.102876","DOIUrl":"10.1016/j.aqrep.2025.102876","url":null,"abstract":"<div><div>Enteritis is a common disease in leopard coral grouper reared under intensive aquaculture conditions. We developed an enteritis model by feeding fish with 0.75 % dextran sulfate sodium (DSS) diet for one week, followed by a three-week period with diets containing graded bile acids levels (0 %, 0.15 %, 0.30 %, 0.45 %, 0.60 %). They were designated as DSSBA0, DSSBA15, DSSBA30, DSSBA45, and DSSBA60, with an control group received no DSS treatment. The results showed that growth performance was significantly impaired in the DSSBA0 group compared with the control group (<em>P</em> &lt; 0.05), while it improved markedly as the bile acids levels increased (<em>P</em> &lt; 0.05). Intestinal indices were significantly enhanced in the dietary bile acids groups, particularly in the DSSBA60 group (<em>P</em> &lt; 0.05). Meanwhile, bile acids supplementation ameliorated DSS induced intestinal damage, including villus atrophy and reduced muscular layer thickness. Moreover, the gene expression of tight junction proteins (<em>zo1</em>, <em>zo2</em>, <em>zo3</em>, <em>occludin</em> and <em>claudin-1</em>) were significantly increased in higher bile acids treatment groups compared with the DSSBA0 group (<em>P</em> &lt; 0.05). Furthermore, gene expression analysis indicated that pro-inflammatory cytokines (<em>tnf-α</em>, <em>inf-γ</em>, <em>il-1β</em>, <em>il-6</em>, <em>il-8</em>) were down-regulated, while the anti-inflammatory cytokine <em>il-10</em> was up-regulated in the higher bile acids groups (DSSBA45 and DSSBA60) compared with the DSSBA0 group (<em>P</em> &lt; 0.05). And the activities of enzymes associated with intestinal inflammation, including myeloperoxidase (MPO) and β-N-acetyl-D-glucosaminidase (NAG), were significantly reduced in the groups supplemented with bile acids. Microbial diversity analysis through 16S rRNA sequencing indicated that dietary bile acids notably increased the abundance of Firmicutes and <em>Candidatus-Arthromitus</em>. The above findings provide strong evidence that bile acids effectively alleviate enteritis in leopard coral grouper by preserving intestinal integrity, modulating inflammatory responses, and enhanced beneficial bacteria abundance. These findings provide a novel nutritional strategy for improving gut health in aquaculture, offering valuable insights for sustainable fish farming.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"43 ","pages":"Article 102876"},"PeriodicalIF":3.2,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071904","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":"Assessment of garden cress (Lepidium sativum) seeds supplementation on Gilthead seabream (Sparus aurata) growth, general health, immunity, histopathology, and heat stress tolerance","authors":"Mohamed M. Toutou ,&nbsp;Mohamed M. Hebalah ,&nbsp;Manal I. El-Barbary ,&nbsp;Ehab El-Haroun ,&nbsp;Norhan E. Saleh","doi":"10.1016/j.aqrep.2025.102887","DOIUrl":"10.1016/j.aqrep.2025.102887","url":null,"abstract":"<div><div>The present study aims to evaluate the effects of feeding dietary garden cress seeds (<em>Lepidium sativum</em>) (GC) at doses of 10, 20, and 40 g/kg diet for 77 days to seabream (<em>Sparus aurata</em>) fingerlings (starting weight = 0.84 ± 0.04 g/fish). Hematological indicators, body composition, feed consumption, growth performance, liver biomarkers, and exposure to heat stress are the assessed parameters. The current findings indicated that seabream fingerlings growth and feed consumption might be enhanced by the dietary GC administration at the level of 40 g/kg diet. The findings showed that GC had a beneficial impact on the fish protein and fat content. Additionally, the findings demonstrated that GC considerably enhanced the hematological parameters (hematocrit, hemoglobin, and the number of white and red blood cells). Serum biomarkers’ values indicated an enhancement in the total protein, albumin, globulin, liver and kidney functions at 40 g/kg supplementation level. Furthermore, at this concentration, the glucose level was depressed meanwhile; the liver glycogen level was increased. Results showed that the use of GC at a level of 40 g/kg decreased the oxidative stress and improved the fish immunity depending on the values of SOD, MDA and lysozyme activities. Fish were subjected to a thermal stress at the end of the experiment at 4 and 32°C, and the results indicated that the fish treated with varying concentrations of GC, as a feed additives showed better resistance than the control group. The histo-pathological examination for three internal organs namely; liver, kidney, and intestine illustrated positive effects on the organs architecture when GC was supplemented in fish diets.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"43 ","pages":"Article 102887"},"PeriodicalIF":3.2,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144069414","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 light intensity on erythrophore number and astaxanthin amount in the skin of coral trout Plectropomus leopardus","authors":"Nannan Zhao ,&nbsp;Jin Gao ,&nbsp;Shuyuan Fu ,&nbsp;Shi Xi Chen","doi":"10.1016/j.aqrep.2025.102883","DOIUrl":"10.1016/j.aqrep.2025.102883","url":null,"abstract":"<div><div>Numerous studies have reported that environmental background color alters the skin color of aquaculture fish. In the present study, we investigated the effects of light intensity on skin coloration, chromatophores numbers, astaxanthin content and gene expression in 7-month-old coral trout <em>Plectropomus leopardus</em>. After been feeding astaxanthin-free diet (AFD) for 30 days, the fish in control group (under natural light) showed little change in skin color. In contrast, the skin color of fish in light-treat group (under 300 lux white light) changed from dark-brown to orange-red, associated with erythrophores number increase, xanhtrophores number reduction and astaxanthin amount increase on the skin. Transcriptomic analysis indicated that several genes related to carotenoid transport, metabolism, cell apoptosis and autophagy show significant variation between the light-treat and control groups. These results suggest that background light intensity affect the proliferation of erythrophores and the acquisition of astaxanthin in the skin of coral trout.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"43 ","pages":"Article 102883"},"PeriodicalIF":3.2,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143948385","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":"Identification of the principal neuropeptide FxFa and its function in larval settlement of the echiuran worm Urechis unicinctus","authors":"Wenyuan Lai ,&nbsp;Long Zhang ,&nbsp;Zhi Yang ,&nbsp;Wei Zhang ,&nbsp;Zhifeng Zhang ,&nbsp;Zhengrui Zhang","doi":"10.1016/j.aqrep.2025.102862","DOIUrl":"10.1016/j.aqrep.2025.102862","url":null,"abstract":"<div><div>Larval settlement and metamorphosis are of great importance in the life history of marine benthic invertebrates, and these events are regulated by neuroendocrine signals such as neuropeptides. However, our knowledge of the molecular mechanisms which neuropeptides regulate downstream genes to induce larval settlement behavior is limited. Here, we compared the effect of eleven FxFa mature peptides, and identified FxFa5 as the principal neuropeptide in triggering the larval settlement of <em>Urechis unicinctus</em> (Xenopneusta, Urechidae), a benthic burrowing echiuran worm in the intertidal zones. A total of 579 differentially expressed genes (DEGs) were identified by analyzing the transcriptome data of the early-segmentation larvae from both FxFa5-treated and control groups, including a cilia-related gene such as <em>FLNB</em> (<em>Filamin B</em>) which may play vital roles in the larval settlement. Whole-mount <em>in situ</em> hybridization revealed <em>FLNB</em> was located in circumoral cilia of the early-segmentation larvae. <em>FLNB</em> knockdown caused the closure, shorter, even disappearance of circumoral cilia, and led to a significant increase in the larval settlement rate. The results of our work indicate FxFa5 triggers the <em>U.unicinctus</em> early-segmentation larval settlement by inhibiting the function of the ciliary gene <em>FLNB</em>, and this study contributes important data for elucidating a complete understanding of neuropeptides regulation in larval settlement of marine benthic invertebrates.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"43 ","pages":"Article 102862"},"PeriodicalIF":3.2,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143948384","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}