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Ren Q, Nie X, Ma X, Han Z, Li Y, Yang X, Ji L, Su R, Ge J, Huang X. The crosstalk between Toll and AMPK signaling pathways mediates growth inhibition of Eriocheir sinensis under deltamethrin stress. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2024; 267:106832. [PMID: 38215609 DOI: 10.1016/j.aquatox.2024.106832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 12/09/2023] [Accepted: 01/07/2024] [Indexed: 01/14/2024]
Abstract
Hepatopancreatic necrosis disease (HPND) broke out in 2015 in the Eriocheir sinensis aquaculture region of Xinghua, Jiangsu Province; however, the specific cause of HPND remains unclear. A correlation was found between HPND outbreak and the use of deltamethrin by farmers. In this study, E. sinensis specimens developed the clinical symptoms of HPND after 93 days of deltamethrin stress. The growth of E. sinensis with HPND was inhibited. Adenosine monophosphate-activated protein kinase (AMPK) is a central regulator of energy homeostasis, and its expression was up-regulated in the intestine of E. sinensis with HPND. Growth inhibitory genes (EsCabut, Es4E-BP, and EsCG6770) were also up-regulated in the intestine of E. sinensis with HPND. The expression levels of EsCabut, Es4E-BP, and EsCG6770 decreased after EsAMPK knockdown. Therefore, AMPK mediated the growth inhibition of E. sinensis with HPND. Further analysis indicated the presence of a crosstalk between the Toll and AMPK signaling pathways in E. sinensis with HPND. Multiple genes in the Toll signaling pathway were upregulated in E. sinensis under 93 days of deltamethrin stress. EsAMPK and its regulated growth inhibition genes were down-regulated after the knockdown of genes in the Toll pathway. In summary, the crosstalk between the Toll and AMPK signaling pathways mediates the growth inhibition of E. sinensis under deltamethrin stress.
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Affiliation(s)
- Qian Ren
- School of Marine Sciences, Nanjing University of information Science & Technology, Nanjing, Jiangsu Province, 210044, PR China.
| | - Ximei Nie
- Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, PR China
| | - Xingkong Ma
- Freshwater Fisheries Research Institute of Jiangsu Province, Nanjing, PR China
| | - Zhengxiao Han
- Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, PR China
| | - Yanfang Li
- Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, PR China
| | - Xintong Yang
- Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, PR China
| | - Lei Ji
- Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, PR China
| | - Rongqian Su
- Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, PR China
| | - Jiachun Ge
- Freshwater Fisheries Research Institute of Jiangsu Province, Nanjing, PR China.
| | - Xin Huang
- Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, PR China.
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Zhang X, Shen G, Guo Y, Zhang X, Zhao Y, Li W, Wang Q, Zhao Y. Genome-wide identification and analysis of the MAPKK gene family in Chinese mitten crab (Eriocheir sinensis) and its response to bacterial challenge. FISH & SHELLFISH IMMUNOLOGY 2023; 143:109132. [PMID: 37797870 DOI: 10.1016/j.fsi.2023.109132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 09/15/2023] [Accepted: 10/01/2023] [Indexed: 10/07/2023]
Abstract
Protein kinases of the MAPK cascade family (MAPKKK-MAPKK-MAPK) play an important role in the growth and development of organisms and their response to environmental stress. The MAPKK gene families in the Chinese mitten crab Eriocheir sinensis have never been systematically analyzed. We identified four MAPKK family genes, EsMEK, EsMAPKK4, EsMAPKK6, and EsMAPKK7, in E. sinensis and analyzed their molecular features and expression patterns. All four MAPKK genes are composed of multiple exons and introns, all have a conserved domain, and all have 10 conserved motifs (except EsMEK and EsMAPKK7 which are missing motif 10). The four MAPKK genes are on four different chromosomes and have no gene duplications, and the results of phylogenetic tree analysis indicate that the ESMAPKK gene family is highly conserved evolutionarily. The EsMAPKK genes were widely expressed in all the examined tissues with higher expression in hemocytes, hepatopancreas, and gills. Notably, EsMAPKK6 was also highly expressed in the ovary. Vibrio parahaemolyticus infection significantly increased the mRNA levels of the EsMAPKK genes in hemocytes. Further disruption of the EsMAPKK gene family expression affects the expression levels of multiple antimicrobial peptides in hemocytes. Our experimental results provide a starting point for a more in-depth study of the innate immunity functional roles of members of the MAPKK gene families in E. sinensis.
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Affiliation(s)
- Xiaona Zhang
- School of Life Sciences, East China Normal University, Shanghai, China
| | - Guoqing Shen
- School of Life Sciences, East China Normal University, Shanghai, China
| | - Yanan Guo
- School of Life Sciences, East China Normal University, Shanghai, China
| | - Xiaoli Zhang
- School of Life Sciences, East China Normal University, Shanghai, China
| | - Yuehong Zhao
- School of Life Sciences, East China Normal University, Shanghai, China
| | - Weiwei Li
- School of Aquatic and Life Sciences, Shanghai Ocean University, Shanghai, China
| | - Qun Wang
- School of Aquatic and Life Sciences, Shanghai Ocean University, Shanghai, China.
| | - Yunlong Zhao
- School of Life Sciences, East China Normal University, Shanghai, China.
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Guo G, Wang M, Zhou D, He X, Han P, Chen G, Zeng J, Liu Z, Wu Y, Weng S, He J. Virome Analysis Provides an Insight into the Viral Community of Chinese Mitten Crab Eriocheir sinensis. Microbiol Spectr 2023; 11:e0143923. [PMID: 37358426 PMCID: PMC10433957 DOI: 10.1128/spectrum.01439-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 06/14/2023] [Indexed: 06/27/2023] Open
Abstract
Recent advances in viromics have led to the discovery of a great diversity of RNA viruses and the identification of a large number of viral pathogens. A systematic exploration of viruses in Chinese mitten crab (Eriocheir sinensis), one of the most important aquatic commercial species, is still lacking. Here, we characterized the RNA viromes of asymptomatic, milky disease (MD)-affected, and hepatopancreatic necrosis syndrome (HPNS)-affected Chinese mitten crabs collected from 3 regions in China. In total, we identified 31 RNA viruses belonging to 11 orders, 22 of which were first reported here. By comparing viral composition between samples, we observed high variation in viral communities across regions, with most of the viral species being region-specific. We proposed to establish several novel viral families or genera based on the phylogenetic relationships and genome structures of viruses discovered in this study, expanding our knowledge of viral diversity in brachyuran crustaceans. IMPORTANCE High-throughput sequencing and meta-transcriptomic analysis provide us with an efficient tool to discover unknown viruses and explore the composition of viral communities in specific species. In this study, we investigated viromes in asymptomatic and diseased Chinese mitten crabs collected from three distant locations. We observed high regional variation in the composition of viral species, highlighting the importance of multi-location sampling. In addition, we classified several novel and ICTV-unclassified viruses based on their genome structures and phylogenetic relationships, providing a new perspective on current viral taxa.
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Affiliation(s)
- Guangyu Guo
- State Key Laboratory of Biocontrol, School of Marine Sciences, Sun Yat-sen University, Zhuhai, China
- China-ASEAN Belt and Road Joint Laboratory on Mariculture Technology, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China
| | - Muhua Wang
- State Key Laboratory of Biocontrol, School of Marine Sciences, Sun Yat-sen University, Zhuhai, China
- China-ASEAN Belt and Road Joint Laboratory on Mariculture Technology, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China
- Guangdong Province Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Dandan Zhou
- State Key Laboratory of Biocontrol, School of Marine Sciences, Sun Yat-sen University, Zhuhai, China
- China-ASEAN Belt and Road Joint Laboratory on Mariculture Technology, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China
| | - Xinyi He
- Guangdong Province Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Peiyun Han
- Guangdong Province Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Gongrui Chen
- Guangdong Province Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Jiamin Zeng
- Guangdong Province Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Zhi Liu
- State Key Laboratory of Biocontrol, School of Marine Sciences, Sun Yat-sen University, Zhuhai, China
| | - Yinqing Wu
- Guangdong Province Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Shaoping Weng
- China-ASEAN Belt and Road Joint Laboratory on Mariculture Technology, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China
- Guangdong Province Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Jianguo He
- State Key Laboratory of Biocontrol, School of Marine Sciences, Sun Yat-sen University, Zhuhai, China
- China-ASEAN Belt and Road Joint Laboratory on Mariculture Technology, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China
- Guangdong Province Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
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Ren Q, Wang H, Zhao Y, Han Z, Xu H, Gao T, Nie X, Huang X. Expression levels of serine proteases, their homologs, and prophenoloxidase in the Eriocheir sinensis with hepatopancreatic necrosis syndrome (HPNS) and their expression regulation by Runt. FISH & SHELLFISH IMMUNOLOGY 2023:108816. [PMID: 37236553 DOI: 10.1016/j.fsi.2023.108816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Revised: 05/04/2023] [Accepted: 05/14/2023] [Indexed: 05/28/2023]
Abstract
The occurrence of hepatopancreatic necrosis syndrome (HPNS) has seriously affected the sustainable development of Chinese mitten crab (Eriocheir sinensis) farming industry. Limited studies have focused on the immune responses in crabs with HPNS. Serine proteases (SPs) and SP homologues (SPHs) play important roles in the innate immunity of crustaceans. This study investigated the effects of HPNS on the expression levels of genes related to prophenoloxidase (proPO) activation system, and the relationship between Runt transcription factor and the transcriptions of these genes. Eight SPs and five SPHs (SPH1-4, Mas) were identified from E. sinensis. SPs contain a catalytic triad of "HDS", while SPHs lack a catalytic residue. SPs and SPHs all contain a conservative Tryp_SPc domain. Evolutionary analysis showed that EsSPs, EsSPHs, EsPO, and EsRunt were clustered with SPs, SPHs, POs, and Runts of other arthropods, respectively. In crabs with HPNS, the expression levels of six SPs (1, 3, 4, 6, 7, and 8), five SPHs, and PO were significantly upregulated in the hepatopancreas. The knockdown of EsRunt could evidently decrease the expression levels of four SPs (3, 4, 5 and 8), five SPHs (SPH1-4, Mas), and PO. Therefore, the occurrence of HPNS activates the proPO system. Furthermore, the expression levels of partial genes related to proPO system were regulated by Runt. The activation of innate immune system may be a strategy for crabs with HPNS to improve immunity and fight diseases. Our study provides a new understanding of the relationship between HPNS and innate immunity.
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Affiliation(s)
- Qian Ren
- School of Marine Sciences, Nanjing University of Information Science & Technology, Nanjing, Jiangsu Province, 210044, China
| | - Hongyu Wang
- Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, China
| | - Yuqi Zhao
- Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, China
| | - Zhengxiao Han
- Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, China
| | - Hao Xu
- Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, China
| | - Tianheng Gao
- Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, China.
| | - Ximei Nie
- Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, China.
| | - Xin Huang
- Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, China.
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Effects of Florfenicol on Intestinal Histology, Apoptosis and Gut Microbiota of Chinese Mitten Crab ( Eriocheir sinensis). Int J Mol Sci 2023; 24:ijms24054412. [PMID: 36901841 PMCID: PMC10002397 DOI: 10.3390/ijms24054412] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 02/20/2023] [Accepted: 02/21/2023] [Indexed: 02/25/2023] Open
Abstract
Excessive use of antibiotics in aquaculture causes residues in aquatic animal products and harms human health. However, knowledge of florfenicol (FF) toxicology on gut health and microbiota and their resulting relationships in economic freshwater crustaceans is scarce. Here, we first investigated the influence of FF on the intestinal health of Chinese mitten crabs, and then explored the role of bacterial community in FF-induced intestinal antioxidation system and intestinal homeostasis dysbiosis. A total of 120 male crabs (48.5 ± 4.5 g) were experimentally treated in four different concentrations of FF (0, 0.5, 5 and 50 μg/L) for 14 days. Responses of antioxidant defenses and changes of gut microbiota were assessed in the intestine. Results revealed that FF exposure induced significant histological morphology variation. FF exposure also enhanced immune and apoptosis characteristics in the intestine after 7 days. Moreover, antioxidant enzyme catalase activities showed a similar pattern. The intestinal microbiota community was analyzed based on full-length 16S rRNA sequencing. Only the high concentration group showed a marked decrease in microbial diversity and change in its composition after 14 days of exposure. Relative abundance of beneficial genera increased on day 14. These findings illustrate that exposure to FF could cause intestinal dysfunction and gut microbiota dysbiosis in Chinese mitten crabs, which provides new insights into the relationship between gut health and gut microbiota in invertebrates following exposure to persistent antibiotics pollutants.
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Yang B, Ma J, Yang W, Qu C, Li B, Xu M, Gao Y, Xu Q. MEK homologue is involved in immune response by regulating antimicrobial peptides expression in Chinese mitten crab Eriocheir sinensis. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2022; 137:104527. [PMID: 36058384 DOI: 10.1016/j.dci.2022.104527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 08/27/2022] [Accepted: 08/28/2022] [Indexed: 06/15/2023]
Abstract
MEK activates the phosphorylation of downstream molecules involved in various immune responses. In this study, an MEK homologue gene in Chinese mitten crab Eriocheir sinensis (designated as EsMEK) was investigated. EsMEK mRNA was constitutively expressed in all tissues with higher expression in hepatopancreas, hemocytes, and gills. EsMEK protein was mainly localized in the cytoplasm. Lipopolysaccharide (LPS) and Aeromonas hydrophila challenge significantly increased the mRNA levels of EsMEK in hemocytes. In addition, the mRNA expression level of some antimicrobial peptides (AMPs), including EsWAP, EsDWD1, and EsALF decreased significantly due to the inhibition of EsMEK by specific dsRNA in LPS-challenged crabs. Downstream pathway analysis revealed that the phosphorylation of EsERK decreased prominently after EsMEK inhibition. These results suggested that EsMEK played an important role in regulating the expression of antimicrobial peptides in E. sinensis through MEK-ERK pathway.
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Affiliation(s)
- Binghui Yang
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, Dalian Minzu University, Dalian, 116600, China
| | - Jinlong Ma
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, Dalian Minzu University, Dalian, 116600, China
| | - Wen Yang
- Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China
| | - Chen Qu
- Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China
| | - Bing Li
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, Dalian Minzu University, Dalian, 116600, China
| | - Mei Xu
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, Dalian Minzu University, Dalian, 116600, China
| | - Yujia Gao
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, Dalian Minzu University, Dalian, 116600, China
| | - Qingsong Xu
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, Dalian Minzu University, Dalian, 116600, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China.
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Zhao Y, Nie X, Han Z, Liu P, Xu H, Huang X, Ren Q. The forkhead box O transcription factor regulates lipase and anti-microbial peptide expressions to promote lipid catabolism and improve innate immunity in the Eriocheir sinensis with hepatopancreatic necrosis disease. FISH & SHELLFISH IMMUNOLOGY 2022; 124:107-117. [PMID: 35378309 DOI: 10.1016/j.fsi.2022.03.047] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 03/28/2022] [Accepted: 03/30/2022] [Indexed: 06/14/2023]
Abstract
Eriocheir sinensis is a crustacean with great economic value, but the occurrence of hepatopancreatic necrosis disease (HPND) severely restricts the development of crab aquaculture. Study on the survival mechanism of crabs with HPND is beneficial to provide new strategies for disease prevention and control. The Forkhead box O (FOXO) transcription factor family is involved in various key biological processes of organisms. In this study, a FOXO gene (named as EsFOXO) from E. sinensis was cloned. The full-length cDNA of EsFOXO is 2592 bp containing a 2133 bp open reading frame that encodes 710 amino acids. EsFOXO was widely distributed in multiple immune tissues. Further study found that the expression of EsFOXO in the intestine of crabs with HPND was significantly upregulated compared with that in the normal crabs. However, whether EsFOXO is involved in the immune and metabolic regulation of crabs remains unknown. RNA interference analysis showed that EsFOXO participates in the positive regulation of the expression of two pancreatic lipases, three anti-lipopolysaccharide factors, and three crustins. Results from our research suggest that two strategies are adopted by crabs with HPND for survival under starvation: on the one hand, the synthesis of antimicrobial peptides is increased to improve the innate immunity; on the other hand, the expression of enzymes correlated with lipid catabolism is up-regulated that mobilizes the fat in the crab, going through catabolism. Our study provides more evidence for an in-depth understanding of the survival mechanism of crabs with HPND.
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Affiliation(s)
- Yuqi Zhao
- Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, China
| | - Ximei Nie
- Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, China
| | - Zhengxiao Han
- Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, China
| | - Peng Liu
- Nanjing Forestry University, Nanjing, Jiangsu Province, 210037, China
| | - Hao Xu
- Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, China
| | - Xin Huang
- Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, China.
| | - Qian Ren
- Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, China.
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