Osmoregulation in juvenile Chinese sturgeon (Acipenser sinensis Gray) during brackish water adaptation.
Identifieur interne : 000429 ( PubMed/Corpus ); précédent : 000428; suivant : 000430Osmoregulation in juvenile Chinese sturgeon (Acipenser sinensis Gray) during brackish water adaptation.
Auteurs : Xugang He ; Ping Zhuang ; Longzhen Zhang ; Congxin XieSource :
- Fish physiology and biochemistry [ 1573-5168 ] ; 2009.
English descriptors
- KwdEn :
- MESH :
- chemical , blood : Electrolytes.
- enzymology : Gills.
- growth & development : Fishes.
- chemical , metabolism : Sodium-Potassium-Exchanging ATPase.
- physiology : Adaptation, Physiological, Fishes, Water-Electrolyte Balance.
- Animals, Salinity, Seawater, Time Factors.
Abstract
The osmoregulation capabilities of 7-month-old juvenile Chinese sturgeon (Acipenser sinensis Gray) (128.8 +/- 15 g) transferred directly from fresh water (0 per thousand, 46 mOsmol kg(-1)) to brackish water (10 per thousand, 273 mOsmol kg(-1)) were studied over a 20-day period. Changes in serum osmolarity, chloride (Cl(-)), sodium (Na+), potassium (K+) and calcium (Ca2+) ion concentrations, as well as gill and spiral valve Na+,K+-ATPase activities were measured at 3, 12, 24, 72, 216 and 480 h after transfer to BW. The serum osmolarity and ion concentrations (Na+, Cl(-) and Ca2+) increased immediately after the transference to BW, reaching maximum at 24 h and returned to a new steady state at 216 h, while the FW control group maintained basal levels which showed lower (P < 0.05) than the BW group. Gill Na+,K+-ATPase activity of BW group exhibited an abrupt decrease in the first 3 h after transfer, but began to increase at 3 h, reaching a peak value at 24 h, and returned to a new steady state at 216 h. The differences between gill Na+,K+-ATPase activity of BW and FW fish were significant (P < 0.05) after 12 h. In contrast, Na+,K+-ATPase activity of the spiral valve showed transient increase after transference from FW to BW, and then decreased rapidly at 3 h, reaching the lowest at 24 h after transference. At 216 h after exposure to BW, Na+,K+-ATPase activities of the spiral valve increased slowly to the levels of FW control. The results of our study indicate the existence of hyposmoregulatory adaptive mechanisms in 7-month-old juvenile Chinese sturgeon which enable this fish to acclimate itself successfully to brackish water.
DOI: 10.1007/s10695-008-9230-5
PubMed: 19343518
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pubmed:19343518Le document en format XML
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<author><name sortKey="He, Xugang" sort="He, Xugang" uniqKey="He X" first="Xugang" last="He">Xugang He</name>
<affiliation><nlm:affiliation>Fisheries College, Huazhong Agricultural University, Wuhan 430070, China.</nlm:affiliation>
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<author><name sortKey="Zhuang, Ping" sort="Zhuang, Ping" uniqKey="Zhuang P" first="Ping" last="Zhuang">Ping Zhuang</name>
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<author><name sortKey="Zhang, Longzhen" sort="Zhang, Longzhen" uniqKey="Zhang L" first="Longzhen" last="Zhang">Longzhen Zhang</name>
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<author><name sortKey="Xie, Congxin" sort="Xie, Congxin" uniqKey="Xie C" first="Congxin" last="Xie">Congxin Xie</name>
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<author><name sortKey="Zhuang, Ping" sort="Zhuang, Ping" uniqKey="Zhuang P" first="Ping" last="Zhuang">Ping Zhuang</name>
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<series><title level="j">Fish physiology and biochemistry</title>
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<term>Animals</term>
<term>Electrolytes (blood)</term>
<term>Fishes (growth & development)</term>
<term>Fishes (physiology)</term>
<term>Gills (enzymology)</term>
<term>Salinity</term>
<term>Seawater</term>
<term>Sodium-Potassium-Exchanging ATPase (metabolism)</term>
<term>Time Factors</term>
<term>Water-Electrolyte Balance (physiology)</term>
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<term>Fishes</term>
<term>Water-Electrolyte Balance</term>
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<front><div type="abstract" xml:lang="en">The osmoregulation capabilities of 7-month-old juvenile Chinese sturgeon (Acipenser sinensis Gray) (128.8 +/- 15 g) transferred directly from fresh water (0 per thousand, 46 mOsmol kg(-1)) to brackish water (10 per thousand, 273 mOsmol kg(-1)) were studied over a 20-day period. Changes in serum osmolarity, chloride (Cl(-)), sodium (Na+), potassium (K+) and calcium (Ca2+) ion concentrations, as well as gill and spiral valve Na+,K+-ATPase activities were measured at 3, 12, 24, 72, 216 and 480 h after transfer to BW. The serum osmolarity and ion concentrations (Na+, Cl(-) and Ca2+) increased immediately after the transference to BW, reaching maximum at 24 h and returned to a new steady state at 216 h, while the FW control group maintained basal levels which showed lower (P < 0.05) than the BW group. Gill Na+,K+-ATPase activity of BW group exhibited an abrupt decrease in the first 3 h after transfer, but began to increase at 3 h, reaching a peak value at 24 h, and returned to a new steady state at 216 h. The differences between gill Na+,K+-ATPase activity of BW and FW fish were significant (P < 0.05) after 12 h. In contrast, Na+,K+-ATPase activity of the spiral valve showed transient increase after transference from FW to BW, and then decreased rapidly at 3 h, reaching the lowest at 24 h after transference. At 216 h after exposure to BW, Na+,K+-ATPase activities of the spiral valve increased slowly to the levels of FW control. The results of our study indicate the existence of hyposmoregulatory adaptive mechanisms in 7-month-old juvenile Chinese sturgeon which enable this fish to acclimate itself successfully to brackish water.</div>
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<Abstract><AbstractText>The osmoregulation capabilities of 7-month-old juvenile Chinese sturgeon (Acipenser sinensis Gray) (128.8 +/- 15 g) transferred directly from fresh water (0 per thousand, 46 mOsmol kg(-1)) to brackish water (10 per thousand, 273 mOsmol kg(-1)) were studied over a 20-day period. Changes in serum osmolarity, chloride (Cl(-)), sodium (Na+), potassium (K+) and calcium (Ca2+) ion concentrations, as well as gill and spiral valve Na+,K+-ATPase activities were measured at 3, 12, 24, 72, 216 and 480 h after transfer to BW. The serum osmolarity and ion concentrations (Na+, Cl(-) and Ca2+) increased immediately after the transference to BW, reaching maximum at 24 h and returned to a new steady state at 216 h, while the FW control group maintained basal levels which showed lower (P < 0.05) than the BW group. Gill Na+,K+-ATPase activity of BW group exhibited an abrupt decrease in the first 3 h after transfer, but began to increase at 3 h, reaching a peak value at 24 h, and returned to a new steady state at 216 h. The differences between gill Na+,K+-ATPase activity of BW and FW fish were significant (P < 0.05) after 12 h. In contrast, Na+,K+-ATPase activity of the spiral valve showed transient increase after transference from FW to BW, and then decreased rapidly at 3 h, reaching the lowest at 24 h after transference. At 216 h after exposure to BW, Na+,K+-ATPase activities of the spiral valve increased slowly to the levels of FW control. The results of our study indicate the existence of hyposmoregulatory adaptive mechanisms in 7-month-old juvenile Chinese sturgeon which enable this fish to acclimate itself successfully to brackish water.</AbstractText>
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