OcrV1, Main, Exploration, bibRecord, 001159

Metabolic response under different salinity and temperature conditions for glass eel Anguilla japonica

Identifieur interne : 001159 ( Main/Exploration ); précédent : 001158; suivant : 001160

Metabolic response under different salinity and temperature conditions for glass eel Anguilla japonica

Auteurs : WAN SOO KIM [Corée du Sud] ; SEONG JIN YOON [Corée du Sud] ; JONG WOOK KIM [Corée du Sud] ; JUNG AH LEE [Corée du Sud] ; TAE WON LEE [Corée du Sud]

Source :

Marine biology : (Berlin) [ 0025-3162 ] ; 2006.

RBID : Pascal:06-0402651

Descripteurs français

Pascal (Inist)
- Salinité, Température, Verre, Milieu marin, Anguilla japonica.
Wicri :
- topic : Verre, Milieu marin.

English descriptors

KwdEn :
- Anguilla japonica, Glass, Marine environment, Salinity, Temperature.

Abstract

Diadromous fish often enter freshwater directly from seawater via fish ladders or channels built in estuarine dams. The oxygen consumption rates (OCR) of glass eel, Anguilla japonica, were determined using an automatic intermittent flow respirometer under various salinity and temperature regimes to physiologically explain this direct movement. The endogenous rhythm of the OCR in wild glass eels, freshly collected from estuaries, was nearly synchronous with the tidal pattern at the estuarine collection site. When the salinity was changed from 20 psu (12°C) at a constant temperature to that of freshwater, the OCR of the glass eels decreased by 21.6±7.0% (mean ± SD) (P<0.05), showing a dampened rhythm for about 48 h. After this period of impediment, the glass eels resumed normal metabolic activity. Direct migration from seawater to freshwater under constant temperature would result in a severe physiological stress for these glass eels for about two days. When the glass eels were exposed to a cyclic change in water temperature of 2°C 26 h^-1, as they encounter in estuaries, and then were introduced to freshwater abruptly, the OCR rhythm corresponded to the cyclic changes in water temperature after exposure to freshwater. Under these conditions, the mean OCR of the glass eels had a small difference before and after exposure to freshwater. These data explained how glass eels can directly move from sea water into the freshwater without any apparent metabolic stress in the estuaries showing cyclic change in water temperature (At = 2°C).

Affiliations:

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Le document en format XML

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<author><name sortKey="Wan Soo Kim" sort="Wan Soo Kim" uniqKey="Wan Soo Kim" last="Wan Soo Kim">WAN SOO KIM</name>
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<author><name sortKey="Seong Jin Yoon" sort="Seong Jin Yoon" uniqKey="Seong Jin Yoon" last="Seong Jin Yoon">SEONG JIN YOON</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Marine Ecosystem and Conservation Research Division, Korea Ocean Research and Development Institute, Ansan, PO Box 29</s1>
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<author><name sortKey="Jong Wook Kim" sort="Jong Wook Kim" uniqKey="Jong Wook Kim" last="Jong Wook Kim">JONG WOOK KIM</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Marine Ecosystem and Conservation Research Division, Korea Ocean Research and Development Institute, Ansan, PO Box 29</s1>
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<author><name sortKey="Jung Ah Lee" sort="Jung Ah Lee" uniqKey="Jung Ah Lee" last="Jung Ah Lee">JUNG AH LEE</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Marine Ecosystem and Conservation Research Division, Korea Ocean Research and Development Institute, Ansan, PO Box 29</s1>
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<author><name sortKey="Tae Won Lee" sort="Tae Won Lee" uniqKey="Tae Won Lee" last="Tae Won Lee">TAE WON LEE</name>
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<front><div type="abstract" xml:lang="en">Diadromous fish often enter freshwater directly from seawater via fish ladders or channels built in estuarine dams. The oxygen consumption rates (OCR) of glass eel, Anguilla japonica, were determined using an automatic intermittent flow respirometer under various salinity and temperature regimes to physiologically explain this direct movement. The endogenous rhythm of the OCR in wild glass eels, freshly collected from estuaries, was nearly synchronous with the tidal pattern at the estuarine collection site. When the salinity was changed from 20 psu (12°C) at a constant temperature to that of freshwater, the OCR of the glass eels decreased by 21.6±7.0% (mean ± SD) (P<0.05), showing a dampened rhythm for about 48 h. After this period of impediment, the glass eels resumed normal metabolic activity. Direct migration from seawater to freshwater under constant temperature would result in a severe physiological stress for these glass eels for about two days. When the glass eels were exposed to a cyclic change in water temperature of 2°C 26 h<sup>-1</sup>
, as they encounter in estuaries, and then were introduced to freshwater abruptly, the OCR rhythm corresponded to the cyclic changes in water temperature after exposure to freshwater. Under these conditions, the mean OCR of the glass eels had a small difference before and after exposure to freshwater. These data explained how glass eels can directly move from sea water into the freshwater without any apparent metabolic stress in the estuaries showing cyclic change in water temperature (At = 2°C).</div>
</front>
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<affiliations><list><country><li>Corée du Sud</li>
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<tree><country name="Corée du Sud"><noRegion><name sortKey="Wan Soo Kim" sort="Wan Soo Kim" uniqKey="Wan Soo Kim" last="Wan Soo Kim">WAN SOO KIM</name>
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<name sortKey="Jong Wook Kim" sort="Jong Wook Kim" uniqKey="Jong Wook Kim" last="Jong Wook Kim">JONG WOOK KIM</name>
<name sortKey="Jung Ah Lee" sort="Jung Ah Lee" uniqKey="Jung Ah Lee" last="Jung Ah Lee">JUNG AH LEE</name>
<name sortKey="Seong Jin Yoon" sort="Seong Jin Yoon" uniqKey="Seong Jin Yoon" last="Seong Jin Yoon">SEONG JIN YOON</name>
<name sortKey="Tae Won Lee" sort="Tae Won Lee" uniqKey="Tae Won Lee" last="Tae Won Lee">TAE WON LEE</name>
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Metabolic response under different salinity and temperature conditions for glass eel Anguilla japonica

Metabolic response under different salinity and temperature conditions for glass eel Anguilla japonica

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri