Osmotic and ion regulation in different species of acipenserids (acipenseriformes, acipenseridae)

Krayushkina, L. S.; Semenova, O. G.

doi:10.1134/s0032945206010139

Cited by 24 publications

(14 citation statements)

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“…The collected blood was centrifuged (20 min, 800 rev/min) after coagulation to obtain serum, and part of it (approximately 6 ml) was store at -60 o C for the determination of cortisol concentrations. Other part of the blood serum samples were used for the determination of osmolarity and ion concentrations in further studies of specifics in osmotic and ionic regulation in these acipenserids (Krayushkina, Semenova, 2006). Samples of gill filaments and kidney were quickly frozen in dry ice and then stored at -60 o C until determination of Na + /K + -activated ATP-ase activity…”

Section: Manipulation and Sampling Proceduresmentioning

confidence: 99%

“…In the sterlet, acclimated to hyperosmotic media as conformer, in this period, the serum sodium concentrations raised up to this parameter in medium. The Siberian sturgeon and the Russian sturgeon was characterized by low serum sodium regulation (Krayushkina and Semenova, 2006).…”

Section: Speciesmentioning

confidence: 99%

“…There is similar data in our experiment with euryhaline starred sturgeon. The difference in kidney Na + /K + activated ATPase activity in studied species, perhaps, connect with the difference in functional ability of their kidneys, namely sodium and water reabsorption ability (Krayushkina et al, 2003;Krayushkina and Semenova, 2006).…”

Section: Speciesmentioning

confidence: 99%

“…The main osmoregulatory and ion-regulatory features in species from these groups were extensively studied in the past: in diadromous seawater sturgeons (Magnin, 1963;Urist and Van de Putte, 1967;McEnroe and Cech, 1985;Potts and Rudy, 1972;Cataldi et al, 1995;Krayushkina, 1998;McKenzie et al, 1999;Krayushkina et al, 2001;Martinez-Alvarez, 2002); in diadromous brackishwater sturgeons (Krayushkina, 1967(Krayushkina, , 1974(Krayushkina, , 1983Krayushkina et al, 1973Krayushkina et al, , 1976Krayushkina et al, , 1977Natochin et al, 1975Natochin et al, , 1985Krayushkina and Moiseenko, 1977b;Semenova, 2004, 2006); in freshwater sturgeons (Magnin, 1963;Krayushkina and Moiseenko, 1977a,b;Krayushkina and Semenova, 2006). The previous investigations have demonstrated different osmotic and ionic regulatory capacities in some freshwater and brackishwater sturgeon species Semenova, 2004, 2006).…”

Section: Introductionmentioning

confidence: 99%

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Level of serum cortisol and Na⁺/K⁺ATP-ase activity of gills and kidneys in different acipenserids

Krayushkina¹,

Semenova²,

V’yushina³

2006

J Appl Ichthyol

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The levels of cortisol in blood serum and the Na + /K + activated ATP-ase activity in the homogenates of the gills and the kidneys were measured in different species of acipenserids in freshwater (control) and after different periods of acclimation to brackish water of 12.5-12.7‰ salinity. Immature sturgeons (2+ years old) were used for the study: the sterlet Acipenser ruthenus L.-a freshwater species from the middle of the Volga River; the Siberian sturgeon from the Lena River A. baerii Brandt -a freshwater species that performs short migrations to brackish waters (5-10‰) of estuaries for feeding; the Russian sturgeon A. gueldenstaedtii Brandt and the starred sturgeon A. stellatus Pallas -both are diadromous species of the Volga-Caspian basin that have regular migrations to brackish water (up to 14‰). The starred sturgeon was additionally held in 18‰ after 12.7‰. The investigated species from freshwater have similar levels of serum cortisol, but different dynamics of this hormone during exposure in brackish water. After seven days of the experiment, the level of serum cortisol increased (p<0.01) 4.1 times in the sterlet and 3 times in the Siberian sturgeon. In the Russian sturgeon, after 7 days of exposure, cortisol level was similar to levels of control fish, although after 3 and 12 hours of acclimation (in the transition period to hypo-osmotic regulation) the hormone levels decreased (p<0.05). In the starred sturgeon, cortisol levels remained without changes during all periods of its life in brackish water. There was the increase of gill Na + /K + -activated ATP-ase activity only in the starred sturgeon exposed in water of 12.7‰ and 18‰ salinity. During acclimation to brackish water of 12.5-12.7‰ salinity, the enzyme activity did not change in the Siberian and the Russian sturgeons and decreased in the starlet. Levels of kidney Na + /K + -activated ATP-ase activity at this period decreased in studied species excluding the Siberian sturgeon that kept the enzyme activity without the changes. The conclusion derived from these studies was that the changes in the serum cortisol levels and Na + /K + ATP-ase activities in gills and kidneys (after fish being transferred to brackish water) explain to a great extent the osmotic and ionic regulatory capacities in different acipenserid species.

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Section: Manipulation and Sampling Proceduresmentioning

confidence: 99%

Section: Speciesmentioning

confidence: 99%

Section: Speciesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Level of serum cortisol and Na⁺/K⁺ATP-ase activity of gills and kidneys in different acipenserids

Krayushkina¹,

Semenova²,

V’yushina³

2006

J Appl Ichthyol

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“…Most euryhaline teleosts exhibit a higher NKA activity in hyperosmotic media (Hwang and Lee 2007), and previous studies show that sturgeons also have similar response when acclimated to hyperosmotic environments (Allen et al 2009;McKenzie et al 1999;Krayushkina and Semenova 2006;Rodriguez et al 2002), except for shortnose sturgeon (A. brevirostrum; Javis and Ballantyne 2003). NKA is a basolateral membrane-bounded enzyme that is found in high abundance within mitochondria-rich cells (MRCs) (Wilson and Laurent 2002), also named chloride cells due to their role in chloride excretion in hyperosmotic environments (Keys and Willmer 1932).…”

Section: Introductionmentioning

confidence: 83%

Adaptive alterations on gill Na+, K+-ATPase activity and mitochondrion-rich cells of juvenile Acipenser sinensis acclimated to brackish water

Zhao

Yang

et al. 2015

Fish Physiol Biochem

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Understanding the physiological changes and osmoregulatory strategy is critical for anadromous species to adapt to large changes between freshwater and marine environments. In this study, juvenile Chinese sturgeon (Acipenser sinensis) were acclimated for 2 months to freshwater (FW, c. 0‰) and brackish water (BW, 15‰). Blood was assessed for changes in osmolality and ions. Gill tissue was assayed for Na(+), K(+)-ATPase (NKA) activity and immunohistochemical analysis on mitochondria-rich cells (MRCs). Serum osmolality and ions concentrations (Na(+), Cl(-) and K(+)) examined, except K(+), increased significantly in those specimens adapted to BW. However, the variations were within the range of effective hyperosmotic adaptation. The specific activity of gill NKA of juveniles adapted to BW was significantly higher (c. 1.6 times) than that of fish adapted to FW. MRCs were mainly presented in the interlamellar region of the filament and at the base of the lamella in either FW- or BW-acclimated individuals. In BW, the number and size of MRCs on filaments greatly increased. However, there was no significant difference in the number and size of the MRCs at the lamella region. Results show that juvenile Chinese sturgeon keep osmotic homeostasis in hyperosmotic environments by increasing gill NKA activity and MRCs' size and number, which is similar to other sturgeons and euryhaline teleosts.

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Motility of sturgeon spermatozoa can sustain successive activations episodes

Dzyuba

Cosson

Boryshpolets

et al. 2013

Animal Reproduction Science

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Osmotic and ion regulation in different species of acipenserids (acipenseriformes, acipenseridae)

Cited by 24 publications

References 1 publication

Level of serum cortisol and Na⁺/K⁺ATP-ase activity of gills and kidneys in different acipenserids

Level of serum cortisol and Na⁺/K⁺ATP-ase activity of gills and kidneys in different acipenserids

Adaptive alterations on gill Na+, K+-ATPase activity and mitochondrion-rich cells of juvenile Acipenser sinensis acclimated to brackish water

Motility of sturgeon spermatozoa can sustain successive activations episodes

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Osmotic and ion regulation in different species of acipenserids (acipenseriformes, acipenseridae)

Cited by 24 publications

References 1 publication

Level of serum cortisol and Na+/K+ATP-ase activity of gills and kidneys in different acipenserids

Level of serum cortisol and Na+/K+ATP-ase activity of gills and kidneys in different acipenserids

Adaptive alterations on gill Na+, K+-ATPase activity and mitochondrion-rich cells of juvenile Acipenser sinensis acclimated to brackish water

Motility of sturgeon spermatozoa can sustain successive activations episodes

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Level of serum cortisol and Na⁺/K⁺ATP-ase activity of gills and kidneys in different acipenserids

Level of serum cortisol and Na⁺/K⁺ATP-ase activity of gills and kidneys in different acipenserids