Effects of exercise and temperature on geosmin excretion by European eel (Anguilla anguilla)

Research output: Contribution to journalArticleAcademicpeer-review

5 Citations (Scopus)

Abstract

The presence of geosmin in fish products causes an earthy or musty off-flavour. To avoid economic damage resulting from market entrance of off-flavoured fish products, fish farmers utilize the reversibility of geosmin uptake to depurate the off-flavours from their fish crops by holding them in clean water just before harvest. To improve this process, effects of exercise and temperature on the excretion of geosmin by European eel (Anguilla anguilla) were assessed. Fish loaded with geosmin were depurated for 23 h during which they were subjected to combinations of exercise (spontaneous swimming activity at 0.05 m s- 1 or forced swimming at optimal swimming speed of 0.55 m s- 1) and temperature (15 °C or 25 °C) treatments. Oxygen consumption was measured during depuration. Whole body geosmin concentrations were measured in samples collected at t = 0 and t = 23 h to assess geosmin excretion. Geosmin excretion by European eel was clearly enhanced by exercise, but temperature had no statistically significant effect. Exercise increased oxygen consumption, which in turn showed a positive linear relation with geosmin excretion. These findings support the idea that the physiological responses aimed at increasing oxygen uptake also affect the branchial exchange of lipophilic xenobiotic chemicals between the fish and its surroundings. Exercise can be used to reduce the time required to depurate off-flavours from fish. These findings are relevant for aquaculture industries confronted with off-flavoured fish crops.
Original languageEnglish
Pages (from-to)390-395
JournalAquaculture
Volume451
DOIs
Publication statusPublished - 2016

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geosmin
Anguilla anguilla
eel
excretion
exercise
fish
off flavors
temperature
fish products
oxygen consumption
uptake mechanisms
aquaculture industry
crop
depuration
effect
xenobiotics
physiological response
crops
farmers
markets

Cite this

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title = "Effects of exercise and temperature on geosmin excretion by European eel (Anguilla anguilla)",
abstract = "The presence of geosmin in fish products causes an earthy or musty off-flavour. To avoid economic damage resulting from market entrance of off-flavoured fish products, fish farmers utilize the reversibility of geosmin uptake to depurate the off-flavours from their fish crops by holding them in clean water just before harvest. To improve this process, effects of exercise and temperature on the excretion of geosmin by European eel (Anguilla anguilla) were assessed. Fish loaded with geosmin were depurated for 23 h during which they were subjected to combinations of exercise (spontaneous swimming activity at 0.05 m s- 1 or forced swimming at optimal swimming speed of 0.55 m s- 1) and temperature (15 °C or 25 °C) treatments. Oxygen consumption was measured during depuration. Whole body geosmin concentrations were measured in samples collected at t = 0 and t = 23 h to assess geosmin excretion. Geosmin excretion by European eel was clearly enhanced by exercise, but temperature had no statistically significant effect. Exercise increased oxygen consumption, which in turn showed a positive linear relation with geosmin excretion. These findings support the idea that the physiological responses aimed at increasing oxygen uptake also affect the branchial exchange of lipophilic xenobiotic chemicals between the fish and its surroundings. Exercise can be used to reduce the time required to depurate off-flavours from fish. These findings are relevant for aquaculture industries confronted with off-flavoured fish crops.",
author = "E. Schram and J.W. Schrama and K. Kusters and C.J.A.F. Kwadijk and A.P. Palstra",
year = "2016",
doi = "10.1016/j.aquaculture.2015.09.032",
language = "English",
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journal = "Aquaculture",
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}

Effects of exercise and temperature on geosmin excretion by European eel (Anguilla anguilla). / Schram, E.; Schrama, J.W.; Kusters, K.; Kwadijk, C.J.A.F.; Palstra, A.P.

In: Aquaculture, Vol. 451, 2016, p. 390-395.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Effects of exercise and temperature on geosmin excretion by European eel (Anguilla anguilla)

AU - Schram, E.

AU - Schrama, J.W.

AU - Kusters, K.

AU - Kwadijk, C.J.A.F.

AU - Palstra, A.P.

PY - 2016

Y1 - 2016

N2 - The presence of geosmin in fish products causes an earthy or musty off-flavour. To avoid economic damage resulting from market entrance of off-flavoured fish products, fish farmers utilize the reversibility of geosmin uptake to depurate the off-flavours from their fish crops by holding them in clean water just before harvest. To improve this process, effects of exercise and temperature on the excretion of geosmin by European eel (Anguilla anguilla) were assessed. Fish loaded with geosmin were depurated for 23 h during which they were subjected to combinations of exercise (spontaneous swimming activity at 0.05 m s- 1 or forced swimming at optimal swimming speed of 0.55 m s- 1) and temperature (15 °C or 25 °C) treatments. Oxygen consumption was measured during depuration. Whole body geosmin concentrations were measured in samples collected at t = 0 and t = 23 h to assess geosmin excretion. Geosmin excretion by European eel was clearly enhanced by exercise, but temperature had no statistically significant effect. Exercise increased oxygen consumption, which in turn showed a positive linear relation with geosmin excretion. These findings support the idea that the physiological responses aimed at increasing oxygen uptake also affect the branchial exchange of lipophilic xenobiotic chemicals between the fish and its surroundings. Exercise can be used to reduce the time required to depurate off-flavours from fish. These findings are relevant for aquaculture industries confronted with off-flavoured fish crops.

AB - The presence of geosmin in fish products causes an earthy or musty off-flavour. To avoid economic damage resulting from market entrance of off-flavoured fish products, fish farmers utilize the reversibility of geosmin uptake to depurate the off-flavours from their fish crops by holding them in clean water just before harvest. To improve this process, effects of exercise and temperature on the excretion of geosmin by European eel (Anguilla anguilla) were assessed. Fish loaded with geosmin were depurated for 23 h during which they were subjected to combinations of exercise (spontaneous swimming activity at 0.05 m s- 1 or forced swimming at optimal swimming speed of 0.55 m s- 1) and temperature (15 °C or 25 °C) treatments. Oxygen consumption was measured during depuration. Whole body geosmin concentrations were measured in samples collected at t = 0 and t = 23 h to assess geosmin excretion. Geosmin excretion by European eel was clearly enhanced by exercise, but temperature had no statistically significant effect. Exercise increased oxygen consumption, which in turn showed a positive linear relation with geosmin excretion. These findings support the idea that the physiological responses aimed at increasing oxygen uptake also affect the branchial exchange of lipophilic xenobiotic chemicals between the fish and its surroundings. Exercise can be used to reduce the time required to depurate off-flavours from fish. These findings are relevant for aquaculture industries confronted with off-flavoured fish crops.

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