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Mwamburi SM, Kawato S, Furukawa M, Konishi K, Nozaki R, Hirono I, Kondo H. De Novo Assembly and Annotation of the Siganus fuscescens (Houttuyn, 1782) Genome: Marking a Pioneering Advance for the Siganidae Family. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2024:10.1007/s10126-024-10325-9. [PMID: 38850360 DOI: 10.1007/s10126-024-10325-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Accepted: 05/21/2024] [Indexed: 06/10/2024]
Abstract
This study presents the first draft genome of Siganus fuscescens, and thereby establishes the first whole-genome sequence for a species in the Siganidae family. Leveraging both long and short read sequencing technologies, i.e., Oxford Nanopore and Illumina sequencing, we successfully assembled a mitogenome spanning 16.494 Kb and a first haploid genome encompassing 498 Mb. The assembled genome accounted for a 99.6% of the estimated genome size and was organized into 164 contigs with an N50 of 7.2 Mb. This genome assembly showed a GC content of 42.9% and a high Benchmarking Universal Single-Copy Orthologue (BUSCO) completeness score of 99.5% using actinopterygii_odb10 lineage, thereby meeting stringent quality standards. In addition to its structural aspects, our study also examined the functional genomics of this species, including the intricate capacity to biosynthesize long-chain polyunsaturated fatty acids (LC-PUFAs) and secrete venom. Notably, our analyses revealed various repeats elements, which collectively constituted 17.43% of the genome. Moreover, annotation of 28,351 genes uncovered both shared genetic signatures and those that are unique to S. fuscescens. Our assembled genome also displayed a moderate prevalence of gene duplication compared to other fish species, which suggests that this species has a distinctive evolutionary trajectory and potentially unique functional constraints. Taken altogether, this genomic resource establishes a robust foundation for future research on the biology, evolution, and the aquaculture potential of S. fuscescens.
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Affiliation(s)
- Samuel Mwakisha Mwamburi
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Konan 4-5-7, Minato-ku, Tokyo, 108-8477, Japan
- Department of Fisheries, Kenya Marine and Fisheries Research Institute, P.O BOX 81651-80100, Mombasa, Kenya
| | - Satoshi Kawato
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Konan 4-5-7, Minato-ku, Tokyo, 108-8477, Japan
| | - Miho Furukawa
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Konan 4-5-7, Minato-ku, Tokyo, 108-8477, Japan
| | - Kayo Konishi
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Konan 4-5-7, Minato-ku, Tokyo, 108-8477, Japan
| | - Reiko Nozaki
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Konan 4-5-7, Minato-ku, Tokyo, 108-8477, Japan
| | - Ikuo Hirono
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Konan 4-5-7, Minato-ku, Tokyo, 108-8477, Japan
| | - Hidehiro Kondo
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Konan 4-5-7, Minato-ku, Tokyo, 108-8477, Japan.
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Thépot V, Slinger J, Rimmer MA, Paul NA, Campbell AH. Is the Intestinal Bacterial Community in the Australian Rabbitfish Siganus fuscescens Influenced by Seaweed Supplementation or Geography? Microorganisms 2022; 10:microorganisms10030497. [PMID: 35336073 PMCID: PMC8954549 DOI: 10.3390/microorganisms10030497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 02/12/2022] [Accepted: 02/17/2022] [Indexed: 02/04/2023] Open
Abstract
We recently demonstrated that dietary supplementation with seaweed leads to dramatic improvements in immune responses in S. fuscescens, a candidate species for aquaculture development in Asia. Here, to assess whether the immunostimulatory effect was facilitated by changes to the gut microbiome, we investigated the effects of those same seaweed species and four commercial feed supplements currently used in aquaculture on the bacterial communities in the hindgut of the fish. Since we found no correlations between the relative abundance of any particular taxa and the fish enhanced innate immune responses, we hypothesised that S. fuscescens might have a core microbiome that is robust to dietary manipulation. Two recently published studies describing the bacteria within the hindgut of S. fuscescens provided an opportunity to test this hypothesis and to compare our samples to those from geographically distinct populations. We found that, although hindgut bacterial communities were clearly and significantly distinguishable between studies and populations, a substantial proportion (55 of 174 taxa) were consistently detected across all populations. Our data suggest that the importance of gut microbiota to animal health and the extent to which they can be influenced by dietary manipulations might be species-specific or related to an animals’ trophic level.
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Affiliation(s)
- Valentin Thépot
- School of Science, Technology and Engineering, University of the Sunshine Coast, Maroochydore DC, QLD 4558, Australia; (M.A.R.); (N.A.P.)
- Correspondence:
| | - Joel Slinger
- CSIRO Agriculture and Food, Bribie Island Research Centre, Woorim, QLD 4507, Australia;
- Institute of Marine and Antarctic Studies, University of Tasmania, Launceston, TAS 7250, Australia
| | - Michael A. Rimmer
- School of Science, Technology and Engineering, University of the Sunshine Coast, Maroochydore DC, QLD 4558, Australia; (M.A.R.); (N.A.P.)
| | - Nicholas A. Paul
- School of Science, Technology and Engineering, University of the Sunshine Coast, Maroochydore DC, QLD 4558, Australia; (M.A.R.); (N.A.P.)
| | - Alexandra H. Campbell
- School of Health and Behavioural Sciences, University of the Sunshine Coast, Maroochydore DC, QLD 4558, Australia;
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Identifying volatile compounds in rabbit fish (Siganus fuscescens) tissues and their enzymatic generation. Eur Food Res Technol 2022. [DOI: 10.1007/s00217-022-03977-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Huang YR, Huang WY, Jen HC, Liu BY, Huang KM, Hwang DF. Comparative Variations of Extractive Nitrogenous Components and Quality in Fresh Muscle and Dried Product of Rabbitfish (Siganus fuscescens) in Taiwan. JOURNAL OF AQUATIC FOOD PRODUCT TECHNOLOGY 2020. [DOI: 10.1080/10498850.2020.1789254] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Yu-Ru Huang
- Department of Food Science, National Penghu University of Science and Technology, Penghu, Taiwan, ROC
| | - Wan-Yi Huang
- Department of Food Science, National Taiwan Ocean University, Keelung, Taiwan, ROC
| | - Hsiao-Chin Jen
- Department of Health Promotion and Gerontological Care, Taipei University of Marine Technology, Taipei, Taiwan, ROC
| | - Bi-Yu Liu
- Department of Nursing, University of Kang Ning, Taipei, Taiwan, ROC
| | - Ken-Meng Huang
- Institute of Marine Biology, National Taiwan Ocean University, Keelung, Taiwan, ROC
| | - Deng Fwu Hwang
- Department of Food Science, National Taiwan Ocean University, Keelung, Taiwan, ROC
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High Arachidonic Acid Levels in the Tissues of Herbivorous Fish Species (Siganus fuscescens, Calotomus japonicus and Kyphosus bigibbus). Lipids 2017; 52:363-373. [PMID: 28332043 DOI: 10.1007/s11745-017-4244-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2016] [Accepted: 03/10/2017] [Indexed: 10/19/2022]
Abstract
The lipid and fatty acid compositions in the various organs (muscle, liver, other viscera) and stomach contents of three common herbivorous fish species in Japan, Siganus fuscescens, Calotomus japonicus and Kyphosus bigibbus, were examined to explore the stable 20:4n-6 (arachidonic acid, ARA) sources. Triacylglycerol (TAG), phosphatidylethanolamine (PtdEtn), and phosphatidylcholine (PtdCho) were the dominant lipid classes, while the major FA contents were 16:0, 18:1n-9, 16:1n-7, 14:0, 18:0, 18:1n-7, and some PUFA, including ARA, 20:5n-3 (eicosapentaenoic acid, EPA), 22:5n-3 (docosapentaenoic acid, DPA), and 22:6n-3 (docosahexaenoic acid, DHA). The amounts of these fatty acids were varied among species and their lipid classes. Phospholipids contained higher levels of PUFA than TAG. However, ARA in both phospholipids and TAG was markedly present in the muscle and viscera of all specimens, particularly in C. japonicus and K. bigibbus. Moreover, their ARA levels were higher than the levels of DHA and EPA. The observed high ARA level is unusual in marine fish and might be characteristic of herbivorous fish. Furthermore, ARA was the dominant PUFA in the stomach contents of the three species, suggesting that the high ARA level originated from their food sources. The above indicates that these three herbivorous fishes are ARA-rich marine foods and have potential utilization as stable ARA resources.
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Saito H, Kurogi H, Chow S, Mochioka N. Variation of Lipids and Fatty Acids of the Japanese Freshwater Eel, Anguilla japonica, during Spawning Migration. J Oleo Sci 2015; 64:603-16. [PMID: 26028326 DOI: 10.5650/jos.ess14293] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The lipid and fatty acid composition of the muscle of the wild Japanese freshwater eel, Anguilla japonica, was analyzed between the initial and terminal stages of spawning migration to clarify the relationship between lipid physiology and maturation. Triacylglycerols were the only major component in the initial-phase eels, which contained high levels of lipids, while comparatively low triacylglycerol levels were observed in terminal-phase eels (Mariana silvers) at spawning area. Significant levels of plasmalogens were found in its phosphatidylethanolamine, different from other common fish species, which have their little levels. The major fatty acids in A. japonica depot triacylglycerols were 14:0, 16:0, 18:0, 16:1n-7, 18:1n-7, 18:1n-9, and 18:2n-6. Noticeable levels of 20:4n-6, EPA, 22:5n-3, and DHA were also found in initial-phase sample TAG at the yellow and initial silver stages. High 18:2n-6 levels in all A. japonica lipids were similar to those in other common freshwater fishes. In all A. japonica tissue phospholipids, high levels of n-6 and n-3 PUFA, such as 20:4n-6, EPA, 22:5n-3, and DHA, were observed except for the matured terminal female sample. High n-6 PUFA levels in terminal-phase samples caught at the spawning area suggest that A. japonica maintains and uses initial fatty acids from inland waters without feeding during long spawning migrations. The post-spawning sample, containing low levels of 20:4n-6 and DHA with unusually high levels of its degradation products (18:3n-6, 20:2n-6, and 18:4n-3), indicates that A. japonica may finally use its most important PUFA as energy for spawning before ending its life.
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Zhang Q, Xie D, Wang S, You C, Monroig Ó, Tocher DR, Li Y. miR-17 is involved in the regulation of LC-PUFA biosynthesis in vertebrates: Effects on liver expression of a fatty acyl desaturase in the marine teleost Siganus canaliculatus. Biochim Biophys Acta Mol Cell Biol Lipids 2014; 1841:934-43. [DOI: 10.1016/j.bbalip.2014.03.009] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2013] [Revised: 02/19/2014] [Accepted: 03/21/2014] [Indexed: 01/09/2023]
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Saito H. Lipid characteristics of two subtropical Seriola fishes, Seriola dumerili and Seriola rivoliana, with differences between cultured and wild varieties. Food Chem 2012; 135:1718-29. [DOI: 10.1016/j.foodchem.2012.05.122] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2011] [Revised: 05/02/2012] [Accepted: 05/31/2012] [Indexed: 11/28/2022]
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Saito H, Okabe M. Characteristics of lipid composition differences between cultured and wild ayu (Plecoglossus altivelis). Food Chem 2012. [DOI: 10.1016/j.foodchem.2011.09.069] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Differences in lipid characteristics among populations: low-temperature adaptability of ayu, Plecoglossus altivelis. Lipids 2011; 47:75-92. [PMID: 22120618 DOI: 10.1007/s11745-011-3628-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2011] [Accepted: 10/21/2011] [Indexed: 10/15/2022]
Abstract
The lipid and fatty acid compositions of the total lipids of three cultured populations (migratory between fresh and salt water, Lake Biwa landlocked, and Setogawa River forms) of ayu, Plecoglossus altivelis, were investigated to clarify the difference in lipid characteristics and temperature adaptability among the three groups. Triacylglycerols were the dominant depot lipids of the three populations, while phospholipids, such as phosphatidylcholine and phosphatidylethanolamine, were found to be the major components of the polar lipids, and their lipid classes are similar to each other. The major fatty acids in the triacylglycerols of all specimens were 16:0, 18:0, 16:1n-7, 18:1n-7, 18:1n-9, 18:2n-6 (linoleic acid), 20:5n-3 (EPA, icosapentaenoic acid), and 22:6n-3 (DHA, docosahexaenoic acid), similar to the tissue phospholipids of the three populations, 16:0, 18:0, 16:1n-7, 18:1n-7, 18:1n-9, 18:2n-6, 20:4n-6, EPA, and DHA. All classes had high levels of 18:2n-6, which originates from their dietary lipids. Compared with the lower DHA levels of the triacylglycerols, the higher levels in the phospholipids suggest their selective accumulation or a biosynthetic pathway to DHA as in freshwater fish. Two populations (the migratory and Setogawa River forms) adapted to lower temperatures with comparatively high levels of polyunsaturated fatty acids (PUFA) for their membrane fluidities. With significantly higher levels of n-3 PUFA and total PUFA, the mean DHA content in the lipids of the Setogawa River form (the population that adapted to lower temperatures) was significantly higher than that of the migratory form. From these results, we concluded that the Setogawa River population actively concentrates long-chain PUFA in its polar lipids and has high adaptability to low temperature.
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