Investigations on energy metabolism of juvenile turbot
Aquaculture continues to be the fastest-growing branch producing foods from animal origin. In Europe the production of turbot (Psetta maxima), a species of high commercial value, rapidly developed over the last decade and is highest among flatfishes. Considering an expected increase in turbot produc...
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ftunivkiel:oai:macau.uni-kiel.de:diss_mods_00009277 2024-06-23T07:54:08+00:00 Investigations on energy metabolism of juvenile turbot Untersuchungen zum Energiestoffwechsel beim juvenilen Steinbutt Dietz, Carsten Susenbeth, Andreas Schulz, Carsten Krieter, Joachim 2012 https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-92772 https://macau.uni-kiel.de/receive/diss_mods_00009277 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/dissertation_derivate_00004438/PhD_thesis_Carsten_Dietz_2012.pdf eng eng https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-92772 https://macau.uni-kiel.de/receive/diss_mods_00009277 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/dissertation_derivate_00004438/PhD_thesis_Carsten_Dietz_2012.pdf https://rightsstatements.org/page/InC/1.0/ info:eu-repo/semantics/openAccess thesis ddc:570 energy metabolism maintenance requirement efficiency of energy utilization turbot Energiestoffwechsel Erhaltungsbedarf Effizienz der Energieverwertung Steinbutt dissertation Text doc-type:PhDThesis 2012 ftunivkiel 2024-06-12T14:20:40Z Aquaculture continues to be the fastest-growing branch producing foods from animal origin. In Europe the production of turbot (Psetta maxima), a species of high commercial value, rapidly developed over the last decade and is highest among flatfishes. Considering an expected increase in turbot production accompanied with decreasing market prices it is of highest relevance to improve the production efficiency of turbot farming to maintain an adequate profit margin. Feeding efficiency is a crucial factor, because feeds represent a minimum of 17% of the total production costs. In addition to the energy required for maintenance the feed must supply the precursors for new tissue production as well as the energy necessary for synthesis of both protein and lipid. Informations about the maintenance energy requirement and the efficiency of energy utilization for growth are the basis for a performance-related feeding and a corresponding diet formulation. In the present study the digestible and metabolizable energy requirements for maintenance (DEm; MEm) as well as the respective efficiencies of energy utilization for growth (kg (DE); kg (ME)) in juvenile turbot were determined and the effects of biotic or abiotic factors examined. Two different methods for determination were applied. In chapter 1 growth experiments accompanied with comparative whole body composition analyses were realized to determine DEm and MEm as well as kg (DE) and kg (ME). The effects of the fish strain (Denmark, DK; Iceland, IS) as well as the partially replacement of fish meal by wheat gluten in the diet were examined as possible factors affecting the energy metabolism. Turbot were reared in a recirculation aquaculture system for 67 days. MEm and DEm were 15.5-21.4 and 17.0-23.5 kJ kg-0.8 d-1, respectively, and kg (ME) and kg (DE) were 0.63-0.68 and 0.59-0.64, respectively. MEm and DEm as well as for kg (ME) and kg (DE) in turbot from IS were higher than in fish from DK, but without any effect on energy retention. Turbot receiving the diet where ... Doctoral or Postdoctoral Thesis Iceland Turbot MACAU: Open Access Repository of Kiel University |
institution |
Open Polar |
collection |
MACAU: Open Access Repository of Kiel University |
op_collection_id |
ftunivkiel |
language |
English |
topic |
thesis ddc:570 energy metabolism maintenance requirement efficiency of energy utilization turbot Energiestoffwechsel Erhaltungsbedarf Effizienz der Energieverwertung Steinbutt |
spellingShingle |
thesis ddc:570 energy metabolism maintenance requirement efficiency of energy utilization turbot Energiestoffwechsel Erhaltungsbedarf Effizienz der Energieverwertung Steinbutt Dietz, Carsten Investigations on energy metabolism of juvenile turbot |
topic_facet |
thesis ddc:570 energy metabolism maintenance requirement efficiency of energy utilization turbot Energiestoffwechsel Erhaltungsbedarf Effizienz der Energieverwertung Steinbutt |
description |
Aquaculture continues to be the fastest-growing branch producing foods from animal origin. In Europe the production of turbot (Psetta maxima), a species of high commercial value, rapidly developed over the last decade and is highest among flatfishes. Considering an expected increase in turbot production accompanied with decreasing market prices it is of highest relevance to improve the production efficiency of turbot farming to maintain an adequate profit margin. Feeding efficiency is a crucial factor, because feeds represent a minimum of 17% of the total production costs. In addition to the energy required for maintenance the feed must supply the precursors for new tissue production as well as the energy necessary for synthesis of both protein and lipid. Informations about the maintenance energy requirement and the efficiency of energy utilization for growth are the basis for a performance-related feeding and a corresponding diet formulation. In the present study the digestible and metabolizable energy requirements for maintenance (DEm; MEm) as well as the respective efficiencies of energy utilization for growth (kg (DE); kg (ME)) in juvenile turbot were determined and the effects of biotic or abiotic factors examined. Two different methods for determination were applied. In chapter 1 growth experiments accompanied with comparative whole body composition analyses were realized to determine DEm and MEm as well as kg (DE) and kg (ME). The effects of the fish strain (Denmark, DK; Iceland, IS) as well as the partially replacement of fish meal by wheat gluten in the diet were examined as possible factors affecting the energy metabolism. Turbot were reared in a recirculation aquaculture system for 67 days. MEm and DEm were 15.5-21.4 and 17.0-23.5 kJ kg-0.8 d-1, respectively, and kg (ME) and kg (DE) were 0.63-0.68 and 0.59-0.64, respectively. MEm and DEm as well as for kg (ME) and kg (DE) in turbot from IS were higher than in fish from DK, but without any effect on energy retention. Turbot receiving the diet where ... |
author2 |
Susenbeth, Andreas Schulz, Carsten Krieter, Joachim |
format |
Doctoral or Postdoctoral Thesis |
author |
Dietz, Carsten |
author_facet |
Dietz, Carsten |
author_sort |
Dietz, Carsten |
title |
Investigations on energy metabolism of juvenile turbot |
title_short |
Investigations on energy metabolism of juvenile turbot |
title_full |
Investigations on energy metabolism of juvenile turbot |
title_fullStr |
Investigations on energy metabolism of juvenile turbot |
title_full_unstemmed |
Investigations on energy metabolism of juvenile turbot |
title_sort |
investigations on energy metabolism of juvenile turbot |
publishDate |
2012 |
url |
https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-92772 https://macau.uni-kiel.de/receive/diss_mods_00009277 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/dissertation_derivate_00004438/PhD_thesis_Carsten_Dietz_2012.pdf |
genre |
Iceland Turbot |
genre_facet |
Iceland Turbot |
op_relation |
https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-92772 https://macau.uni-kiel.de/receive/diss_mods_00009277 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/dissertation_derivate_00004438/PhD_thesis_Carsten_Dietz_2012.pdf |
op_rights |
https://rightsstatements.org/page/InC/1.0/ info:eu-repo/semantics/openAccess |
_version_ |
1802646153778429952 |