Aquaculture Reports最新文献

{"title":"Transcriptomic and nutritional analysis of the hepatopancreas in cultured juvenile Panulirus ornatus throughout the moult cycle","authors":"Courtney L. Lewis ,&nbsp;Basseer M. Codabaccus ,&nbsp;Chris G. Carter ,&nbsp;Quinn P. Fitzgibbon ,&nbsp;Gregory G. Smith ,&nbsp;Abigail Elizur ,&nbsp;Tomer Ventura","doi":"10.1016/j.aqrep.2024.102477","DOIUrl":"10.1016/j.aqrep.2024.102477","url":null,"abstract":"<div><div>Juveniles of the ornate spiny lobster, <em>Panulirus ornatus,</em> grow rapidly through frequent moulting events, requiring them to accumulate sufficient nutrient reserves to fuel the energetically demanding process of ecdysis. As moulting events occur so often, especially in the early-stage juveniles, it is critical that the juveniles maintain adequate nutritional condition throughout the moult cycle for maximum survival. This is especially important for animals housed together on a larger scale within commercial culture environments for ensuring maximum survival. In this study, the nutritional condition of juvenile <em>P. ornatus</em> examined over the duration of a moult cycle from the 7th to 8th juvenile moulting events. Nutritional condition was measured through biochemical composition analysis as well as histological and transcriptomic examination of the hepatopancreas. The rapid accumulation of nutrient reserves was evident by the increase of dry matter and gross energy over the moult cycle. Six days following ecdysis, there was a significant reduction in total lipids consistent with a downregulation of genes associated with lipid metabolism. Histological examination of the hepatopancreas did not illustrate any changes in the cell distribution or morphology associated with the consistent drop in total lipids and associated metabolic pathways suggesting the involvement of other regulatory mechanisms. The present study is the first to investigate biochemical changes over the duration of a moult cycle in early juvenile stages of <em>P. ornatus</em>, imperative for enhancing the understanding of energy demands of undergoing frequent ecdysis and provides insights into nutrient utilisation for this species.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"39 ","pages":"Article 102477"},"PeriodicalIF":3.2,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Activated charcoal supplementation in cottonseed meal-based feed improved growth performance and antioxidant capacity through enhancing intestinal barrier function in grass carp juveniles (Ctenopharyngodon idellus)","authors":"Hengchen Liu ,&nbsp;Zhengyan Gu ,&nbsp;Yan Lin ,&nbsp;Shanshan Shao ,&nbsp;Mohammed Kebede Kassaw ,&nbsp;Shiyou Chen ,&nbsp;Wenqiang Jiang ,&nbsp;Linjie Qian ,&nbsp;Siyue Lu ,&nbsp;Siming Li ,&nbsp;Linghong Miao","doi":"10.1016/j.aqrep.2024.102442","DOIUrl":"10.1016/j.aqrep.2024.102442","url":null,"abstract":"<div><div>To evaluate the efficiency of activated charcoal (AC) in cottonseed meal-based feed (CSM; 38.46 % CSM, 1275 mg/kg free gossypol), experimental diets supplemented with 0 % AC, 1.5 % AC and 3.0 % AC were prepared and used to feed grass carp juveniles (<em>Ctenopharyngodon idellus</em>, initial weight of 5.0±0.5 g) for 8 weeks. The results showed that the 1.5 % AC group significantly increased final body weight (FBW), weight growth rate (WGR), specific growth rate (SGR), and activated the expressions of intestinal barrier-associated genes zonula occludens-1 (<em>zo</em>-<em>1</em>), <em>zo</em>-<em>2</em> and <em>claudin</em>-<em>c</em> compared with 0 % AC group (<em>P</em> &lt; 0.05). Additionally, the 1.5 % AC and the 3.0 % AC groups significantly promoted the expression of <em>claudin</em>-<em>12</em> (<em>P</em> &lt; 0.05). Compared with the 0 % AC group, the 1.5 % AC group had significantly higher total protein (TP) concentration and significantly lower glucose (GLU) concentration and aspartate aminotransferase (AST) activity (<em>P</em> &lt; 0.05). Liver antioxidant results showed that supplementation with 1.5 % AC and 3.0 % AC groups significantly reduced malondialdehyde (MDA) content and increased glutathione reductase (GR) activity (<em>P</em> &lt; 0.05). Total-superoxide dismutase (T-SOD) and glutathione-S-transferase (GST) activities were significantly higher in the 1.5 % AC group than those in the other groups (<em>P</em> &lt; 0.05). The antioxidant gene results showed that <em>gr</em> and GST omega 1 (<em>gsto1</em>) levels were significantly higher in the 3.0 % AC group than in the 0 % AC group (<em>P</em> &lt; 0.05). The 1.5 % AC group significantly promoted nuclear factor erythroid 2-related factor 2 (<em>nrf2</em>) expression, and the 1.5 % AC and 3.0 % AC groups significantly inhibited the expressions of kelch-like ECH-associated protein 1 (<em>keap1a</em>) and <em>keap1b</em> (<em>P</em> &lt; 0.05). Liver apoptotic and inflammatory genes showed that the expressions of caspase 9 (<em>casp9</em>), BCL2 associated X a (<em>baxa</em>), nuclear factor-kappa B (<em>nfκb</em>) and inhibitor of kappa B (<em>iκb</em>) were significantly lower in the 1.5 % AC group than those in the other groups (<em>P</em> &lt; 0.05). The expression of <em>casp8</em> in the 1.5 % AC group was significantly lower than in the 0 % AC group (<em>P</em> &lt; 0.05). Additionally, the expressions of p38 mitogen-activated protein kinase (<em>p38MAPK</em>) and iκb kinase-beta (<em>ikkβ</em>) were significantly suppressed in the 1.5 % AC group and 3.0 % AC group (<em>P</em> &lt; 0.05). In summary, 1.5 % AC supplementation in CSM-based feed can enhance intestinal barrier function, alleviate CSM-based feed-induced apoptosis, improve liver antioxidant, and thus promote grass carp weight growth rate.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"39 ","pages":"Article 102442"},"PeriodicalIF":3.2,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Transcriptomic responses to transportation stress in the juvenile Chinese sea bass (Lateolabrax maculatus)","authors":"Yue Su ,&nbsp;Sarinpan Kokau ,&nbsp;Xiao-Ning Zhang ,&nbsp;Yun-Wei Dong","doi":"10.1016/j.aqrep.2024.102467","DOIUrl":"10.1016/j.aqrep.2024.102467","url":null,"abstract":"<div><div>Transportation is a necessary aspect of the aquaculture industry that might induce inevitable stress and compromise product quality. In the present study, the transcriptomic profiles in the brain and liver of Chinese sea bass (<em>Lateolabrax maculatus</em>) were characterized after transportation stress at two different densities (low-density: 20 kg/m³ and high-density: 40 kg/m³). Transcriptome analysis revealed that 485 and 627 differentially expressed genes (DEGs) were determined in the brain and liver from sea bass after transportation stress, respectively. KEGG enrichment analysis demonstrated that the DEGs were significantly enriched in focal adhesion, PI3K-Akt, MAPK signaling pathway, apoptosis, and circadian rhythm under transportation stress. Protein-Protein Interaction (PPI) networks showed that COL1A1, COL1A2, COL5A2, COL10A1, and COL16A1 associated with protein digestion and absorption, together with LUM, SERPINH1, and ADAMTS2 were recognized as hub genes in the brain, while JUN, NFKB1, MAPK14, MAP3K7, HSPA1, HSP90AA1, PIK3CA and PIK3R1 tightly related to MAPK and PI3K-Akt signaling pathway and SMAD3 and PPARGC1A were considered as hub genes in the liver. These results indicated that the alterations in transcripts of sea bass are primarily involved in cell adhesion, signal transduction, immune response, and metabolic regulation in response to transportation stress. Our study provides new perspectives into the molecular mechanism underlying responses to transportation and theoretical support for optimizing transportation in the Chinese sea bass.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"39 ","pages":"Article 102467"},"PeriodicalIF":3.2,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142578213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Induced spawning of tropical sea cucumber, Stichopus fusiformiossa by neurotransmitters: Challenges and way forward","authors":"Kah-Mei Cheong ,&nbsp;Izzat Irfan ,&nbsp;Mathan Ganasan ,&nbsp;Musfirah Zulkurnain ,&nbsp;Sau Pinn Woo ,&nbsp;Annette Jaya-Ram","doi":"10.1016/j.aqrep.2024.102464","DOIUrl":"10.1016/j.aqrep.2024.102464","url":null,"abstract":"<div><div>It is imperative to develop aquaculture methods for the tropical sea cucumber, <em>Stichopus fusiformiossa</em> as it is an essential component for the pharmaceutical and traditional medicine industry in Malaysia. With sea cucumber stocks harvested freely, conservation efforts should be in place to overcome future depletion or loss of populations in the wild. This study represents the first report to induce spawning of <em>S. fusiformiossa</em> using conventional methods (thermal shock, desiccation, microalgae stimulation) and neurotransmitter injections (serotonin, 1-methyladenine, epinephrine, norepinephrine) in an indoor based aquaculture system. Post induction, the sea cucumbers were observed for 8 hours. They displayed classic sea cucumber pre-spawning behaviours, namely, raising their head, swaying the anterior (side to side, back and forth, head spinning/circling) and prominent visibility of the gonopore. All neurotransmitters used successfully triggered the pre-spawning behaviours, with the group induced with 1-methyladenine remaining active throughout the observation period. During the first 10 minutes (0 hr) of neurotransmitter injection, 1-methyladenine induced group had more than 50 % of the animals with visible gonopores. Generally, body-raising behaviour was observed across all treatments at 0 hr. On the other hand, swaying behaviour was displayed more frequently in all neurotransmitter induced groups, although it remained below 40 % in each case. No swaying action was revealed in the group with raised temperature and microalgae stimulation treated group. While all treatments showed varying degrees of promising pre-spawning behaviour, none spawned during the observation duration. Histology of male and female gonad development stages were also examined randomly. This study describes challenges faced during spawning induction and general maintenance of stichopodid sea cucumbers which potentially undergo autolysis or melting of their external body wall due to physical stress. Utilization of neurotransmitters was unsuccessful; however, the findings from this study paves way for further avenues of research to elucidate the spawning induction techniques of <em>S. fusiformiossa.</em></div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"39 ","pages":"Article 102464"},"PeriodicalIF":3.2,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142578138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Possible involvement of Jun, Foxo1, Nobox in the regulation of smad2/3 transcription in the protogynous hermaphroditic ricefield eel (Monopterus albus)","authors":"Zhi He ,&nbsp;Haochen Wang ,&nbsp;Li Zheng ,&nbsp;Qiqi Chen,&nbsp;Jinxin Xiong,&nbsp;Mingqiang Chen,&nbsp;Wenxiang Ding,&nbsp;Junjie Huang,&nbsp;Kuo Gao,&nbsp;Bolin Lai,&nbsp;Zhijun Ma,&nbsp;Ziting Tang,&nbsp;Mingwang Zhang,&nbsp;Deying Yang,&nbsp;Taiming Yan","doi":"10.1016/j.aqrep.2024.102465","DOIUrl":"10.1016/j.aqrep.2024.102465","url":null,"abstract":"<div><div>Small mothers against decapentaplegic2/3 (Smad2/3) are two signalling intermediates in the transforming growth factor beta (TGF-β) signalling pathway, which plays a critical role in gonad development. However, a systemic analysis of Smad2/3 in <em>Monopterus albus</em> (<em>M. albus</em>) has not been performed. The <em>smad2</em> sequence in <em>M. albus</em> was characterized in our previous publication. In this study, we characterized the nucleotide sequence of <em>smad3</em> and reported that <em>smad3</em> is widely expressed in different tissues of <em>M. albus</em>. Importantly, the expression of <em>smad3</em> significantly increased at the early vitellogenic stage in the ovary and decreased with oocyte maturation. Next, we aimed to identify the upstream factors that regulate Smad2/3 transcription. The 5′ flanking sequences of <em>smad2/3</em> were cloned, and their core promoter regions were determined to be between −447 bp and −100 bp and between −1520 bp and −927 bp, respectively. The Jun and Foxo1 binding sites were conserved in the <em>smad2</em> promoter region, and the Sp1, Bcl-6, and Nobox binding sites were conserved in the <em>smad3</em> promoter region. Through dual-luciferase reporter gene experiments, we showed that Jun and Foxo1 binding sites may be involved in the regulation of <em>smad2</em> transcription, whereas the Nobox binding site may be involved in the activation of the <em>smad3</em> promoter.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"39 ","pages":"Article 102465"},"PeriodicalIF":3.2,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142578214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Early mucosal responses in common carp (Cyprinus carpio) to the infection of Aeromonas hydrophila","authors":"Jiali Wang ,&nbsp;Qi Zhou ,&nbsp;Hongyu Zhang ,&nbsp;Yanliang Jiang","doi":"10.1016/j.aqrep.2024.102466","DOIUrl":"10.1016/j.aqrep.2024.102466","url":null,"abstract":"<div><div>Common carp (<em>Cyprinus carpio</em>), an economically important freshwater fish species, is worldwide farmed especially in Europe and Asia. The current high-density intensive rearing way leading to a high susceptibility to various pathogens, and <em>Aeromonas hydrophila</em> is one of the most frequently encountered bacteria, causing huge economic losses to the common carp industry. The mucosal barrier of fish constitutes the first line of defense against various pathogens, and some level of inter-connectivity exists among teleost mucosal tissues. However, the molecular basis for a common mucosal immune response at multiple sites or response at one site but during different timepoints following stimulation remains to be studied. In this study, we examined and systematically analyzed a total of 144 transcriptome files from three primary common carp mucosal tissues at four early timepoints following the infection of <em>A. hydrophila</em>. A total of 410 unigenes were significantly differentially expressed in all tested mucosal tissues. Through GO enrichment and KEGG pathway analysis, 28 key genes which might played critical roles in the common mucosal immune response of common carp during the early stage of bacterial infection were identified. Further WGCNA analysis showed that, besides the common response, three mucosal tissues exhibited tissue-specific gene regulatory network. Meanwhile, candidate hub genes in each tissue were identified, including <em>trim3</em>, <em>rpl14</em>, <em>tln2</em>, <em>itpr1</em>, and others. Our results will provide a fundamental basis for understanding the molecular mechanisms of teleost mucosal immunity, and might suggest strategies for developing novel teleost mucosal vaccines in aquaculture.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"39 ","pages":"Article 102466"},"PeriodicalIF":3.2,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142561105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Effects of dietary of bile acid on growth performance, antioxidant capacity, liver and intestinal health and immune function in loach (Misgurnus anguillicaudatus)","authors":"Haihui Liu ,&nbsp;Xinyu Zhang ,&nbsp;Ke Li ,&nbsp;Qiongya Fang ,&nbsp;Xiaorui Liu ,&nbsp;Li Sun ,&nbsp;Guiliang Guo ,&nbsp;Siyu An ,&nbsp;Min Li ,&nbsp;Guiqin Wang ,&nbsp;Yidi Kong","doi":"10.1016/j.aqrep.2024.102455","DOIUrl":"10.1016/j.aqrep.2024.102455","url":null,"abstract":"<div><div>Bile acid (BA) play an important role in nutrient absorption and are key regulators of antioxidant and immune response homeostasis. The purpose of this study was to evaluate the effects of dietary supplementation with 0 (CON), 100 (BA100), 200 (BA200), 300 (BA300) and 400 (BA400) mg/kg BA on the growth, digestive enzyme activity, antioxidant capacity and immune response of loach. The results of serum biochemical analysis showed that the serum markers of liver damage (ALT, AST, ALP and LDH) of loach were decreased by adding BA. The BA diets mainly affected the lipase activity in the liver and intestine of loach, but there was no significant difference on protease. Histological section results showed that dietary supplementation with 100, 200 and 300 mg/kg BA increased the number of liver nuclei, liver vacuolation, intestinal wall muscle thickness and intestinal villi. In addition, BA enhanced the antioxidant capacity of loach by increasing the activities of GSH, GSH-Px, CAT, SOD and GST in their tissues (liver and intestine) and the mRNA expression levels of antioxidant-related genes (<em>cat</em>, <em>gsh-px</em>, <em>sod</em> and <em>nrf2</em>). At the same time, BA increased serum immune parameters (C3, C4, IgM and LYS), up-regulated the mRNA expression levels of anti-inflammatory factors (<em>il-10</em>), key immune genes (<em>lys</em>) and down-regulated the mRNA expression levels of pro-inflammatory factors (<em>il-1β</em> and <em>tnf-α</em>) in tissues (liver and intestine). In conclusion, dietary BA supplementation could improve the liver and intestinal digestive enzyme activities, enhance the antioxidant capacity and immune function, and promote the healthy growth of loach. Based on the results of these studies, the optimal supplementation of BA in loach diets was 200–300 mg/kg.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"39 ","pages":"Article 102455"},"PeriodicalIF":3.2,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142561103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Mechanisms of Amomum villosum essential oil in enhancing tilapia (Oreochromis niloticus) intestinal health","authors":"Xiangbing Zeng ,&nbsp;Xiaoting Zheng ,&nbsp;Chenghui Li ,&nbsp;Junchao Ming ,&nbsp;Hongbiao Dong ,&nbsp;Jiasong Zhang","doi":"10.1016/j.aqrep.2024.102451","DOIUrl":"10.1016/j.aqrep.2024.102451","url":null,"abstract":"<div><div><em>Amomum villosum</em> is a member of the ginger family to treat gastrointestinal diseases in humans. Supplementing the diet of tilapia (<em>Oreochromis niloticus</em>) with essential oil (EOA) can enhance digestive and intestinal antioxidant capacity. We conducted a comparative experiment using tilapia to further understand the potential molecular response mechanism to dietary EOA. Fish were divided into four groups with different feeding doses of EOA: L (2 g/Kg) group, M (4 g/Kg) group, and H (8 g/Kg) group, along with a control group without EOA supplementation. The level of inflammatory factors (TNF-α, IL-1) declined significantly in the EOA group. Comparative transcriptome of the intestines revealed differentially expressed genes (DEGs) in each group, which further revealed that enriched terms were closely related to important pathways such as PI3K-Akt signaling, cell adhesion molecules, regulation of actin cytoskeleton, and autoimmune thyroid disease. These pathways play significant roles in regulating various cellular processes and immune responses of intestines. Intestine metabolomic analysis indicated that dietary EOA caused changes in metabolic processes, particularly in nucleotide metabolism, indicating the potential impact of EOA on these processes. To identify key factors regulating the molecular response to EOA supplementation, a weighted gene co-expression network analysis combined with transcriptome and differential metabolites to identify key genes and metabolites. Glycitein and genistein are substances related to the metabolism of soybean meal were identified. <em>Hmgb2</em>, <em>Parp11</em>, <em>Bcoll</em> is considered to be the key genes, and has the immune regulation function. This study provides new insights into the molecular basis underlying the protective effects of dietary EOA in tilapia. The results can benefit the aquaculture industry by developing dietary strategies to improve the health and welfare of tilapia in intensive farming.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"39 ","pages":"Article 102451"},"PeriodicalIF":3.2,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142561102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Impact of increasing temperatures on neuroendocrine and molecular responses of skeletal muscle and liver in fish: A comprehensive review","authors":"Alberto Sáez-Arteaga ,&nbsp;Ivan Viegas ,&nbsp;Mariana Palma ,&nbsp;Patricio Dantagnan ,&nbsp;Iván Valdebenito ,&nbsp;Elías Figueroa Villalobos ,&nbsp;Adrián Hernández ,&nbsp;Jimena Guerrero-Jiménez ,&nbsp;Isidoro Metón ,&nbsp;Cristopher Heyser","doi":"10.1016/j.aqrep.2024.102448","DOIUrl":"10.1016/j.aqrep.2024.102448","url":null,"abstract":"<div><div>Recent projections suggest that food security may face threats due to climate change and population growth. Global warming is altering ocean temperatures, impacting productivity and aquatic ecosystems. This review delves into the impact of heat stress on fish aquaculture, focusing on the neuroendocrine system, controlled by the hypothalamic-pituitary-interrenal (HPI) axis. This axis regulates stress responses via cortisol and catecholamines, influencing energy metabolism and stress adaptation. The review discusses molecular adaptations in skeletal muscle and liver, affecting gene expression related to growth and energy metabolism. On the other hand, heat stress provokes notable molecular responses, altering the expression of genes involved in glycolysis and oxidative phosphorylation, and hormonal pathways like growth hormone and insulin growth factors, which are vital for metabolic regulation and muscle growth. In summary, this review provides insights into the neuroendocrine and molecular mechanisms underlying fish responses to thermal stress, emphasizing the importance of skeletal muscle and liver tissues in mediating physiological adaptations. Furthermore, it analyzes the implications for protein synthesis, cellular signaling pathways, oxidative stress, and enzymatic responses in aquatic organisms, highlighting the importance of understanding these molecular adaptations to develop effective mitigation strategies that ensure the sustainability of aquaculture systems amidst changing conditions.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"39 ","pages":"Article 102448"},"PeriodicalIF":3.2,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142561104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Inclusion of different blends of poultry processed proteins in practical diets for African catfish (Clarias gariepinus) reared in RAS: Effects on nutrient digestibility, growth performance and fillet quality","authors":"Cecilia Fanizza ,&nbsp;Angela Trocino ,&nbsp;Vlastimil Stejskal ,&nbsp;Markéta Prokešová ,&nbsp;Mahyar Zare ,&nbsp;Hung Quang Tran ,&nbsp;Fabio Brambilla ,&nbsp;Gerolamo Xiccato ,&nbsp;Francesco Bordignon","doi":"10.1016/j.aqrep.2024.102447","DOIUrl":"10.1016/j.aqrep.2024.102447","url":null,"abstract":"<div><div>The present study aimed to test the effects of different dietary inclusion levels of fishmeal (F) and blends of poultry processed protein meals (P), i.e. poultry by-product meal, hydrolysed feather meal, dry-blood meal in African catfish (<em>Clarias gariepinus</em>). Fish were fed during 84 days with four practical diets, i.e. diet HF-LP (F: 90 g kg⁻¹; P: 227 g kg⁻¹), diet MF-MP (F: 45 g kg⁻¹; P: 280 g kg⁻¹), diet HF-HP (F: 90 g kg⁻¹; P: 315 g kg⁻¹), and diet LF-HP (F: 10 g kg⁻¹; P: 392 g kg⁻¹). Fish fed diet LF-HP showed the lowest protein and lipid digestibility coefficients (82 % and 92 % vs. 84 % and 94 %, respectively; <em>p</em>&lt;0.05) compared to fish fed the other diets, and the worst performance in terms of final body weight (551 g vs. 673 g), feed intake (247 g d⁻¹ vs. 301 g d⁻¹), condition factor (0.83 vs. 0.86), specific growth rate (2.69 % d⁻¹ vs. 3.14 % d⁻¹), and feed conversion ratio (1.34 vs. 1.11) (<em>p</em>&lt;0.001). Fish fed diet MF-MP reported the highest survival rate compared to other diets (96.8 % vs. 94.5 %; <em>p</em>&lt;0.001). Fish fed diets with the highest inclusion rates of poultry by-product meal (140 g kg⁻¹ or 165 g kg⁻¹) and hydrolysed feather meal (125 g kg⁻¹ or 135 g kg⁻¹) were associated with the lowest fillet yield (46.2 % vs. 47.1 %) respect to fish fed the other diets (<em>p</em>&lt;0.05). In conclusion, a diet with 10 g kg⁻¹ of fishmeal and 392 g kg⁻¹ of a blend of poultry processed animal proteins is not suitable to sustain the performance of African catfish, whereas a diet with a minimum content of fishmeal at 45 g kg⁻¹ and a blend of poultry processed animal proteins at about 280 g kg⁻¹ could be technically and economically attractive for the RAS farming of this species.</div></div>","PeriodicalId":8103,"journal":{"name":"Aquaculture Reports","volume":"39 ","pages":"Article 102447"},"PeriodicalIF":3.2,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142538369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}