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Sveen LR, Robinson N, Krasnov A, Daniels RR, Vaadal M, Karlsen C, Ytteborg E, Robledo D, Salisbury S, Dagnachew B, Lazado CC, Tengs T. Transcriptomic landscape of Atlantic salmon (Salmo salar L.) skin. G3 (BETHESDA, MD.) 2023; 13:jkad215. [PMID: 37724757 PMCID: PMC10627282 DOI: 10.1093/g3journal/jkad215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 06/21/2023] [Accepted: 09/13/2023] [Indexed: 09/21/2023]
Abstract
In this study, we present the first spatial transcriptomic atlas of Atlantic salmon skin using the Visium Spatial Gene Expression protocol. We utilized frozen skin tissue from 4 distinct sites, namely the operculum, pectoral and caudal fins, and scaly skin at the flank of the fish close to the lateral line, obtained from 2 Atlantic salmon (150 g). High-quality frozen tissue sections were obtained by embedding tissue in optimal cutting temperature media prior to freezing and sectioning. Further, we generated libraries and spatial transcriptomic maps, achieving a minimum of 80 million reads per sample with mapping efficiencies ranging from 79.3 to 89.4%. Our analysis revealed the detection of over 80,000 transcripts and nearly 30,000 genes in each sample. Among the tissue types observed in the skin, the epithelial tissues exhibited the highest number of transcripts (unique molecular identifier counts), followed by muscle tissue, loose and fibrous connective tissue, and bone. Notably, the widest nodes in the transcriptome network were shared among the epithelial clusters, while dermal tissues showed less consistency, which is likely attributable to the presence of multiple cell types at different body locations. Additionally, we identified collagen type 1 as the most prominent gene family in the skin, while keratins were found to be abundant in the epithelial tissue. Furthermore, we successfully identified gene markers specific to epithelial tissue, bone, and mesenchyme. To validate their expression patterns, we conducted a meta-analysis of the microarray database, which confirmed high expression levels of these markers in mucosal organs, skin, gills, and the olfactory rosette.
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Affiliation(s)
| | - Nicholas Robinson
- Nofima, Fish Health, Tromsø NO-9291, Norway
- School of BioSciences, The University of Melbourne, Melbourne 3010, Australia
| | | | - Rose Ruiz Daniels
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, The University of Edinburgh, Edinburgh EH25 9RG, UK
| | | | | | | | - Diego Robledo
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, The University of Edinburgh, Edinburgh EH25 9RG, UK
| | - Sarah Salisbury
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, The University of Edinburgh, Edinburgh EH25 9RG, UK
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Kokkali M, Sveen L, Larsson T, Krasnov A, Giakovakis A, Sweetman J, Lyons P, Kousoulaki K. Optimisation of trace mineral supplementation in diets for Atlantic salmon smolt with reference to holistic fish performance in terms of growth, health, welfare, and potential environmental impacts. Front Physiol 2023; 14:1214987. [PMID: 37664428 PMCID: PMC10469859 DOI: 10.3389/fphys.2023.1214987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Accepted: 07/26/2023] [Indexed: 09/05/2023] Open
Abstract
The aquafeed ingredient inventory is ever changing, from marine to plant based, and recently evolving to incorporate increasing amounts of low trophic, side stream and circular economy based raw materials, each one contributing with variable amounts and qualities of macro- and micronutrients. Meeting the micronutrient requirement of farmed fish for healthy and efficient growth under normal and challenging conditions is of paramount importance. In this study we run a trial based on a 2 × 4 factorial design with three replications for each dietary treatment, where Atlantic salmon smolt were fed one of 8 experimental diets supplemented with either organic or inorganic mineral premixes (copper, iron, manganese, selenium, and zinc) at four dietary inclusion levels. We saw a trend for higher growth rate in the organic mineral groups irrespective of the dietary mineral levels. Mineral digestibility was negatively correlated with increasing mineral supplementation levels for all tested minerals but Se which increased with the increasing supplementation in the inorganic and up to the 2nd inclusion level in the organic mineral groups. Increasing mineral supplementation affected retention efficiency of Zn, Mn, Cu and Fe while mineral source affected only the retention of Se which was higher in the organic mineral groups. Moreover, fish obtained higher EPA and DHA in their body and increased slaughter yield in the organic as compared to the inorganic mineral groups and corroborated that trace mineral inclusion levels play a key role on salmon fillet's technical quality. More effects from different origin and dietary inclusion levels of trace minerals were seen on fillet yield, fillet technical and nutritional quality, bone strength, skin morphology, organ mineralization and midgut transcriptome.
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Affiliation(s)
| | - Lene Sveen
- Department of Fish Health, Nofima, Ås, Norway
| | - Thomas Larsson
- Department of Nutrition and Feed Technology, Nofima, Bergen, Norway
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Sveen LR, Chikwati E, Dalum A, Kortner TM, Ravndal J, Einen O, Mørkøre T. Lesions of the biliary system in Atlantic salmon (Salmo salar L.). JOURNAL OF FISH DISEASES 2023; 46:281-285. [PMID: 36308766 PMCID: PMC10092841 DOI: 10.1111/jfd.13724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 10/06/2022] [Accepted: 10/11/2022] [Indexed: 06/16/2023]
Affiliation(s)
- Lene R. Sveen
- Norwegian Institute of Food Fisheries and Aquaculture Research (Nofima)TromsøNorway
| | - Elvis Chikwati
- Department of Paraclinical Sciences, Faculty of Veterinary MedicineNorwegian University of Life SciencesÅsNorway
| | - Alf Dalum
- Norwegian Institute of Food Fisheries and Aquaculture Research (Nofima)TromsøNorway
| | - Trond M. Kortner
- Department of Paraclinical Sciences, Faculty of Veterinary MedicineNorwegian University of Life SciencesÅsNorway
| | | | | | - Turid Mørkøre
- Department of Animal and Aquacultural Sciences, Faculty of BiosciencesNorwegian University of Life SciencesÅsNorway
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