Features of osmotic and ionic regulations in russian sturgeon (Acipenser güldenstädti brandt)

IuV, Natochin; Vi, Luk'ianenko; Vi, Kirsanov; Ea, Lavrova; Gf, Metallov; Ei, Shakhmatova

doi:10.1016/0300-9629(85)90040-4

Cited by 25 publications

(12 citation statements)

References 3 publications

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“…Indeed, it has previously been suggested (Hickman, 1968) that mesangial cells are the structure responsible for quick adaptation from a freshwater to a saline environment. On the other hand, low blood serum osmolarity appears to be maintained in fresh- water sturgeons by kidney intensive potassium excretion (Natochin et al, 1987). We are currently studying the structural characteristics of the renal tubuli in order to gain insights into their possible role in controlling the ionic balance.…”

Section: Discussionmentioning

confidence: 99%

Renal corpuscle of the sturgeon kidney: An ultrastructural, chemical dissection, and lectin‐binding study

2003

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The sturgeon is an ancient species of fish that thrives in a wide range of ecological environments, from freshwater to seawater. Basic in this process of adaptation is the ability of the kidney to control fluid filtration and urine formation. However, the morphological basis of this process is mostly unknown. The aim of the present study was to use microdissection techniques (scanning electron microscopy (SEM), transmission electron microscopy (TEM), and lectin-binding histochemistry) to examine the structure of the renal corpuscle of the sturgeon Acipenser nacarii in order to reveal morphologic features that could be related to function, phylogeny, and habitat. The renal corpuscles are aligned along the intrarrenal arteries. The urinary pole shows a siphon-like neck segment (NS) in 92% of the nephrons, whose structural characteristics are different from those of other fish. The podocytes have cuboidal cellular bodies, intercellular contacts, and poorly developed cell processes. The podocyte glycocalyx contains N-acetylglucosamine and lacks sialic acid. The structural and lectin-binding patterns are similar to those found in the immature mammalian kidney. The glomerular basement membrane (GBM) is very thick and consists of three layers: a lamina rara externa, a lamina densa, and a thick subendothelial lamina. The latter contains tubular microfibrils, collagen fibers, and long mesangial cell processes. Frequently, the podocyte bodies attach directly to the GBM, and the area occupied by the filtration slits is very small. Furthermore, the GBM shows a glycosylation pattern different from that observed in most vertebrates. Contrary to what would be expected in sturgeons living in freshwater, the A. nacarii renal corpuscle morphology suggests a low glomerular filtration rate. Anat Rec Part A 272A: 563-573, 2003.

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Section: Discussionmentioning

confidence: 99%

Renal corpuscle of the sturgeon kidney: An ultrastructural, chemical dissection, and lectin‐binding study

2003

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“…A basic pattern of the gill vascular organization in teleosts and chondrosteans was demonstrated (Dunel & Laurent, 1978). As far as sturgeons are concerned, Krayushkina et al (1976) describe for Huso huso L., a generic increase of chloride cells after 5 days of acclimation at 12·5‰ salinity, and Laurent & Dunel (1980) According to Natochin et al (1985), it is possible that sturgeons follow osmoregulatory mechanisms somewhat dissimilar from those of the teleosts. However, another conclusion can be drawn from the above preliminary observations: notwithstanding the fact that during the acclimation trials young Acipenser naccarii survived for a long period in SW, some features suggest an increasing difficulty to adapt.…”

Section: Discussionmentioning

confidence: 99%

“…Some Russian species seem to have a narrow range of euryhalinity (Shelukin et al, 1990;Natochin et al, 1985). Few morphological studies have described cell and tissue features in relation to the osmoregulatory function.…”

Section: Introductionmentioning

confidence: 99%

Acclimation trials of juvenile Italian sturgeon to different salinities: morpho-physiological descriptors

Cataldi¹

1995

Journal of Fish Biology

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In this study the first experimental trials of acclimation to salinities of the Italian sturgeon Acipenser naccarii are described. Preliminary observations regarding some morphological features of the gut, kidney and gills following exposure to 20 and 30‰ salinity are reported, and compared with those displayed by many teleosts in hyper-and hypoosmoregulation. Results are discussed with regard to the osmoregulatory mechanisms and to the physiological limits of adaptability of this species in the second year of its life cycle. Within the Acipenseridae, Acipenser naccarii is generally considered a euryhaline species, but nothing is known about its mechanisms of osmotic homeostasis. This species could be a good candidate for aquaculture in fresh and brackish waters owing to the recent success obtained in artificial reproduction.1995 The Fisheries Society of the British Isles

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“…The physiological mechanisms involved in maintaining the plasmatic hydromineral equilibrium under brackish water condition, however, are unknown. Sturgeon and teleosts that move between fresh water and salt water must maintain rather tight control of serum water and ion concentration for efficient physiological function (Natochin et al 1985;Krayushkina et al 1995). Regulatory mechanisms are similar in sturgeon and teleosts (Krayushkina et al 1995).…”

Section: Introductionmentioning

confidence: 98%

Osmoregulation in juvenile Chinese sturgeon (Acipenser sinensis Gray) during brackish water adaptation

Zhuang

Zhang

et al. 2008

Fish Physiol Biochem

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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.

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Features of osmotic and ionic regulations in russian sturgeon (Acipenser güldenstädti brandt)

Cited by 25 publications

References 3 publications

Renal corpuscle of the sturgeon kidney: An ultrastructural, chemical dissection, and lectin‐binding study

Renal corpuscle of the sturgeon kidney: An ultrastructural, chemical dissection, and lectin‐binding study

Acclimation trials of juvenile Italian sturgeon to different salinities: morpho-physiological descriptors

Osmoregulation in juvenile Chinese sturgeon (Acipenser sinensis Gray) during brackish water adaptation

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