Control of voluntary feed intake in fish: a role for dietary oxygen demand in Nile tilapia (Oreochromis niloticus) fed diets with different macronutrient profiles
It has been hypothesised that, at non-limiting water oxygen conditions, voluntary feed intake (FI) in fish is limited by the maximal physiological capacity of oxygen use (i.e. an ‘oxystatic control of FI in fish’). This implies that fish will adjust FI when fed diets differing in oxygen demand, resu...
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2012
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ftunivwagenin:oai:library.wur.nl:wurpubs/430831 2024-02-04T10:00:31+01:00 Control of voluntary feed intake in fish: a role for dietary oxygen demand in Nile tilapia (Oreochromis niloticus) fed diets with different macronutrient profiles Subramanian, S. Geurden, I. Figueiredo-Silva, A.C. Kaushik, S.J. Haidar, M.N. Verreth, J.A.J. Schrama, J.W. 2012 application/pdf https://research.wur.nl/en/publications/control-of-voluntary-feed-intake-in-fish-a-role-for-dietary-oxyge https://doi.org/10.1017/S0007114511006842 en eng https://edepot.wur.nl/239980 https://research.wur.nl/en/publications/control-of-voluntary-feed-intake-in-fish-a-role-for-dietary-oxyge doi:10.1017/S0007114511006842 info:eu-repo/semantics/openAccess Wageningen University & Research British Journal of Nutrition 108 (2012) 8 ISSN: 0007-1145 bass dicentrarchus-labrax body-composition dynamic action energy-utilization food-intake gadus-morhua lipid-levels rainbow-trout salmon salmo-salar trout oncorhynchus-mykiss info:eu-repo/semantics/article Article/Letter to editor info:eu-repo/semantics/publishedVersion 2012 ftunivwagenin https://doi.org/10.1017/S0007114511006842 2024-01-10T23:21:35Z It has been hypothesised that, at non-limiting water oxygen conditions, voluntary feed intake (FI) in fish is limited by the maximal physiological capacity of oxygen use (i.e. an ‘oxystatic control of FI in fish’). This implies that fish will adjust FI when fed diets differing in oxygen demand, resulting in identical oxygen consumption. Therefore, FI, digestible energy (DE) intake, energy balance and oxygen consumption were monitored at non-limiting water oxygen conditions in Nile tilapia fed diets with contrasting macronutrient composition. Diets were formulated in a 2 × 2 factorial design in order to create contrasts in oxygen demand: two ratios of digestible protein (DP):DE (‘high’ v. ‘low’); and a contrast in the type of non-protein energy source (‘starch’ v. ‘fat’). Triplicate groups of tilapia were fed each diet twice daily to satiation for 48 d. FI (g DM/kg0·8 per d) was significantly lower (9·5 %) in tilapia fed the starch diets relative to the fat diets. The DP:DE ratio affected DE intakes (P <0·05), being 11 % lower with ‘high’ than with ‘low’ DP:DE ratio diets, which was in line with the 11·9 % higher oxygen demand of these diets. Indeed, DE intakes of fish showed an inverse linear relationship with dietary oxygen demand (DOD; R 2 0·81, P <0·001). As hypothesised (‘oxystatic’ theory), oxygen consumption of fish was identical among three out of the four diets. Altogether, these results demonstrate the involvement of metabolic oxygen use and DOD in the control of FI in tilapia. Article in Journal/Newspaper Gadus morhua Salmo salar Wageningen UR (University & Research Centre): Digital Library British Journal of Nutrition 108 8 1519 1529 |
institution |
Open Polar |
collection |
Wageningen UR (University & Research Centre): Digital Library |
op_collection_id |
ftunivwagenin |
language |
English |
topic |
bass dicentrarchus-labrax body-composition dynamic action energy-utilization food-intake gadus-morhua lipid-levels rainbow-trout salmon salmo-salar trout oncorhynchus-mykiss |
spellingShingle |
bass dicentrarchus-labrax body-composition dynamic action energy-utilization food-intake gadus-morhua lipid-levels rainbow-trout salmon salmo-salar trout oncorhynchus-mykiss Subramanian, S. Geurden, I. Figueiredo-Silva, A.C. Kaushik, S.J. Haidar, M.N. Verreth, J.A.J. Schrama, J.W. Control of voluntary feed intake in fish: a role for dietary oxygen demand in Nile tilapia (Oreochromis niloticus) fed diets with different macronutrient profiles |
topic_facet |
bass dicentrarchus-labrax body-composition dynamic action energy-utilization food-intake gadus-morhua lipid-levels rainbow-trout salmon salmo-salar trout oncorhynchus-mykiss |
description |
It has been hypothesised that, at non-limiting water oxygen conditions, voluntary feed intake (FI) in fish is limited by the maximal physiological capacity of oxygen use (i.e. an ‘oxystatic control of FI in fish’). This implies that fish will adjust FI when fed diets differing in oxygen demand, resulting in identical oxygen consumption. Therefore, FI, digestible energy (DE) intake, energy balance and oxygen consumption were monitored at non-limiting water oxygen conditions in Nile tilapia fed diets with contrasting macronutrient composition. Diets were formulated in a 2 × 2 factorial design in order to create contrasts in oxygen demand: two ratios of digestible protein (DP):DE (‘high’ v. ‘low’); and a contrast in the type of non-protein energy source (‘starch’ v. ‘fat’). Triplicate groups of tilapia were fed each diet twice daily to satiation for 48 d. FI (g DM/kg0·8 per d) was significantly lower (9·5 %) in tilapia fed the starch diets relative to the fat diets. The DP:DE ratio affected DE intakes (P <0·05), being 11 % lower with ‘high’ than with ‘low’ DP:DE ratio diets, which was in line with the 11·9 % higher oxygen demand of these diets. Indeed, DE intakes of fish showed an inverse linear relationship with dietary oxygen demand (DOD; R 2 0·81, P <0·001). As hypothesised (‘oxystatic’ theory), oxygen consumption of fish was identical among three out of the four diets. Altogether, these results demonstrate the involvement of metabolic oxygen use and DOD in the control of FI in tilapia. |
format |
Article in Journal/Newspaper |
author |
Subramanian, S. Geurden, I. Figueiredo-Silva, A.C. Kaushik, S.J. Haidar, M.N. Verreth, J.A.J. Schrama, J.W. |
author_facet |
Subramanian, S. Geurden, I. Figueiredo-Silva, A.C. Kaushik, S.J. Haidar, M.N. Verreth, J.A.J. Schrama, J.W. |
author_sort |
Subramanian, S. |
title |
Control of voluntary feed intake in fish: a role for dietary oxygen demand in Nile tilapia (Oreochromis niloticus) fed diets with different macronutrient profiles |
title_short |
Control of voluntary feed intake in fish: a role for dietary oxygen demand in Nile tilapia (Oreochromis niloticus) fed diets with different macronutrient profiles |
title_full |
Control of voluntary feed intake in fish: a role for dietary oxygen demand in Nile tilapia (Oreochromis niloticus) fed diets with different macronutrient profiles |
title_fullStr |
Control of voluntary feed intake in fish: a role for dietary oxygen demand in Nile tilapia (Oreochromis niloticus) fed diets with different macronutrient profiles |
title_full_unstemmed |
Control of voluntary feed intake in fish: a role for dietary oxygen demand in Nile tilapia (Oreochromis niloticus) fed diets with different macronutrient profiles |
title_sort |
control of voluntary feed intake in fish: a role for dietary oxygen demand in nile tilapia (oreochromis niloticus) fed diets with different macronutrient profiles |
publishDate |
2012 |
url |
https://research.wur.nl/en/publications/control-of-voluntary-feed-intake-in-fish-a-role-for-dietary-oxyge https://doi.org/10.1017/S0007114511006842 |
genre |
Gadus morhua Salmo salar |
genre_facet |
Gadus morhua Salmo salar |
op_source |
British Journal of Nutrition 108 (2012) 8 ISSN: 0007-1145 |
op_relation |
https://edepot.wur.nl/239980 https://research.wur.nl/en/publications/control-of-voluntary-feed-intake-in-fish-a-role-for-dietary-oxyge doi:10.1017/S0007114511006842 |
op_rights |
info:eu-repo/semantics/openAccess Wageningen University & Research |
op_doi |
https://doi.org/10.1017/S0007114511006842 |
container_title |
British Journal of Nutrition |
container_volume |
108 |
container_issue |
8 |
container_start_page |
1519 |
op_container_end_page |
1529 |
_version_ |
1789965847325835264 |