Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 442338
Title Oxygen Consumption Constrains Food Intake in Fish Fed Diets Varying in Essential Amino Acid Composition
Author(s) Subramanian, S.; Geurden, I.; Figueiredo-Silva, A.C.; Nusantoro, S.; Kaushik, S.J.; Verreth, J.A.J.; Schrama, J.W.
Source PLoS One 8 (2013)8. - ISSN 1932-6203 - 7 p.
DOI https://doi.org/10.1371/journal.pone.0072757
Department(s) Aquaculture and Fisheries
WIAS
Publication type Refereed Article in a scientific journal
Publication year 2013
Keyword(s) trout oncorhynchus-mykiss - european sea bass - rainbow-trout - dissolved-oxygen - nile tilapia - feed-intake - oreochromis-niloticus - salmo-gairdneri - self-selection - protein
Abstract Compromisation of food intake when confronted with diets deficient in essential amino acids is a common response of fish and other animals, but the underlying physiological factors are poorly understood. We hypothesize that oxygen consumption of fish is a possible physiological factor constraining food intake. To verify, we assessed the food intake and oxygen consumption of rainbow trout fed to satiation with diets which differed in essential amino acid (methionine and lysine) compositions: a balanced vs. an imbalanced amino acid diet. Both diets were tested at two water oxygen levels: hypoxia vs. normoxia. Trout consumed 29% less food under hypoxia compared to normoxia (p0.05). This difference in food intake between diets under normoxia together with the identical oxygen consumption supports the hypothesis that food intake in fish can be constrained by a set-point value of oxygen consumption, as seen here on a six-week time scale.
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