Juvenile turbot (Scophthalmus maximus L., 1758) farmed in a modern low-water exchange RAS device: Growth performance using different diets and its commercial implications
One step to improve the economics of Recirculated Aquaculture Systems (RAS) is the use of the right feed. A 12-week lasting growth trial with juvenile turbot (Scophthalmus maximus) with an average initial weight of 54.4 ± 19.3 g evaluated the economic impact of choosing the best feed. Therefore, com...
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ftawi:oai:epic.awi.de:46466 2023-05-15T18:15:45+02:00 Juvenile turbot (Scophthalmus maximus L., 1758) farmed in a modern low-water exchange RAS device: Growth performance using different diets and its commercial implications Bischoff, Adrian A. Lutz, Michael Buck, Bela H. 2018 https://epic.awi.de/id/eprint/46466/ https://doi.org/10.1080/10454438.2017.1412378 https://hdl.handle.net/10013/epic.efae016b-6273-421b-8514-82d45c0e78f3 unknown Bischoff, A. A. , Lutz, M. and Buck, B. H. orcid:0000-0001-7491-3273 (2018) Juvenile turbot (Scophthalmus maximus L., 1758) farmed in a modern low-water exchange RAS device: Growth performance using different diets and its commercial implications , Journal of Applied Aquaculture, 30 (1), pp. 15-28 . doi:10.1080/10454438.2017.1412378 <https://doi.org/10.1080/10454438.2017.1412378> , hdl:10013/epic.efae016b-6273-421b-8514-82d45c0e78f3 EPIC3Journal of Applied Aquaculture, 30(1), pp. 15-28, ISSN: 1045-4438 Article peerRev 2018 ftawi https://doi.org/10.1080/10454438.2017.1412378 2021-12-24T15:43:37Z One step to improve the economics of Recirculated Aquaculture Systems (RAS) is the use of the right feed. A 12-week lasting growth trial with juvenile turbot (Scophthalmus maximus) with an average initial weight of 54.4 ± 19.3 g evaluated the economic impact of choosing the best feed. Therefore, commercially available feeds recommended for turbot culture, two floating (feed 1 and feed 3) and one sinking (feed 2), were tested in a low-water exchange RAS device. Compositions of the macronutrients for the floating diets were 56.0% (protein), 12.0% (fat), 1.1% (fiber), and 10.0% (ash) for feed 1, which will be referred to as Floating 1, and 55.0% (protein), 16.0% (fat), 0.7% (fiber), and 11.0% (ash) for feed 3, which will be referred as Floating 2. The macronutrient composition of feed 2, which will be referred to as Sinking, was 50.0% (protein), 15.0% (fat), 1.4% (fiber), and 9.9% (ash). Growth performance differed significantly between feeds; the specific growth rates (SGR) ranged between 0.92% d−1 (Sinking) and 1.25% d−1 (Floating 1 and 2), resulting in a significantly higher growth rate for the floating feeds. Feed conversion ratios (FCR) were also significantly different, and Sinking showed the highest FCRs during the experiment. We assume that this was caused by the different swimming characteristics of the feeds and the foraging behavior of the fish instead of the different nutritional compositions of the diets. Including retailer prices, the feed costs per kg produced fish differed between 9.3% and 20.2%, resulting in the highest production costs for the Sinking. Therefore, finding the right feed for turbot and optimizing the feeding regime according to its requirements will improve the economic feasibility of turbot culture. Article in Journal/Newspaper Scophthalmus maximus Turbot Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Journal of Applied Aquaculture 30 1 15 28 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
One step to improve the economics of Recirculated Aquaculture Systems (RAS) is the use of the right feed. A 12-week lasting growth trial with juvenile turbot (Scophthalmus maximus) with an average initial weight of 54.4 ± 19.3 g evaluated the economic impact of choosing the best feed. Therefore, commercially available feeds recommended for turbot culture, two floating (feed 1 and feed 3) and one sinking (feed 2), were tested in a low-water exchange RAS device. Compositions of the macronutrients for the floating diets were 56.0% (protein), 12.0% (fat), 1.1% (fiber), and 10.0% (ash) for feed 1, which will be referred to as Floating 1, and 55.0% (protein), 16.0% (fat), 0.7% (fiber), and 11.0% (ash) for feed 3, which will be referred as Floating 2. The macronutrient composition of feed 2, which will be referred to as Sinking, was 50.0% (protein), 15.0% (fat), 1.4% (fiber), and 9.9% (ash). Growth performance differed significantly between feeds; the specific growth rates (SGR) ranged between 0.92% d−1 (Sinking) and 1.25% d−1 (Floating 1 and 2), resulting in a significantly higher growth rate for the floating feeds. Feed conversion ratios (FCR) were also significantly different, and Sinking showed the highest FCRs during the experiment. We assume that this was caused by the different swimming characteristics of the feeds and the foraging behavior of the fish instead of the different nutritional compositions of the diets. Including retailer prices, the feed costs per kg produced fish differed between 9.3% and 20.2%, resulting in the highest production costs for the Sinking. Therefore, finding the right feed for turbot and optimizing the feeding regime according to its requirements will improve the economic feasibility of turbot culture. |
format |
Article in Journal/Newspaper |
author |
Bischoff, Adrian A. Lutz, Michael Buck, Bela H. |
spellingShingle |
Bischoff, Adrian A. Lutz, Michael Buck, Bela H. Juvenile turbot (Scophthalmus maximus L., 1758) farmed in a modern low-water exchange RAS device: Growth performance using different diets and its commercial implications |
author_facet |
Bischoff, Adrian A. Lutz, Michael Buck, Bela H. |
author_sort |
Bischoff, Adrian A. |
title |
Juvenile turbot (Scophthalmus maximus L., 1758) farmed in a modern low-water exchange RAS device: Growth performance using different diets and its commercial implications |
title_short |
Juvenile turbot (Scophthalmus maximus L., 1758) farmed in a modern low-water exchange RAS device: Growth performance using different diets and its commercial implications |
title_full |
Juvenile turbot (Scophthalmus maximus L., 1758) farmed in a modern low-water exchange RAS device: Growth performance using different diets and its commercial implications |
title_fullStr |
Juvenile turbot (Scophthalmus maximus L., 1758) farmed in a modern low-water exchange RAS device: Growth performance using different diets and its commercial implications |
title_full_unstemmed |
Juvenile turbot (Scophthalmus maximus L., 1758) farmed in a modern low-water exchange RAS device: Growth performance using different diets and its commercial implications |
title_sort |
juvenile turbot (scophthalmus maximus l., 1758) farmed in a modern low-water exchange ras device: growth performance using different diets and its commercial implications |
publishDate |
2018 |
url |
https://epic.awi.de/id/eprint/46466/ https://doi.org/10.1080/10454438.2017.1412378 https://hdl.handle.net/10013/epic.efae016b-6273-421b-8514-82d45c0e78f3 |
genre |
Scophthalmus maximus Turbot |
genre_facet |
Scophthalmus maximus Turbot |
op_source |
EPIC3Journal of Applied Aquaculture, 30(1), pp. 15-28, ISSN: 1045-4438 |
op_relation |
Bischoff, A. A. , Lutz, M. and Buck, B. H. orcid:0000-0001-7491-3273 (2018) Juvenile turbot (Scophthalmus maximus L., 1758) farmed in a modern low-water exchange RAS device: Growth performance using different diets and its commercial implications , Journal of Applied Aquaculture, 30 (1), pp. 15-28 . doi:10.1080/10454438.2017.1412378 <https://doi.org/10.1080/10454438.2017.1412378> , hdl:10013/epic.efae016b-6273-421b-8514-82d45c0e78f3 |
op_doi |
https://doi.org/10.1080/10454438.2017.1412378 |
container_title |
Journal of Applied Aquaculture |
container_volume |
30 |
container_issue |
1 |
container_start_page |
15 |
op_container_end_page |
28 |
_version_ |
1766188956126281728 |