geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Osmoregulation of the common carp (Cyprinus carpio) when exposed to an osmotic challenge assessed in-vivo and non-invasively by diffusion- and T2-weighted magnetic resonance imaging


, : Osmoregulation of the common carp (Cyprinus carpio) when exposed to an osmotic challenge assessed in-vivo and non-invasively by diffusion- and T2-weighted magnetic resonance imaging. Comparative Biochemistry and Physiology Part A Molecular and Integrative Physiology 124(3): 343-352

The regulation of the total, extracellular and intracellular water content in the muscle and liver of the stenohaline common carp in response to an exposure of 1 wt.% NaCl was studied in an in-vivo and non-invasive way in conscious fish. The method of choice was in-vivo magnetic resonance imaging (MRI), which allowed study of dynamic changes in the free water content (T2) and the intra- versus extracellular water content of tissues (apparent diffusion coefficient, ADC). Also plasma osmolarity data were obtained which confirmed that the common carp is a hyperregulator and which were correlated in time with water content data. The demonstrated drop in T2-weighted signal intensity (T2w SI) values revealed water loss in both liver and muscle during the first days of salt exposure. As soon as the plasma osmolarity increased, recovery from the water loss was discerned in both tissues, as demonstrated by the increased T2w SI values, reaching after 21 days of exposure control values in muscle and twice the control value in the liver, reflecting the massive water gain of this organ. The observed ADC values increased linearly, revealing cell shrinkage the first day of exposure with subsequent continuous increase of the extracellular volume. No cell volume repair was observed during the investigated period, not even in the muscle tissue whose water content was restored after 21 days.

US$19.90

DOI: 10.1016/s1095-6433(99)00124-5


Other references

Sheehy, J.E.; Mitchell, P.L.; Kirk, G.J.D.; Ferrer, A.B., 2005: Can smarter nitrogen fertilizers be designed? Matching nitrogen supply to crop requirements at high yields using a simple model. There are numerous difficulties in modelling the uptake of nitrogen by roots. To help make progress a very simple model based on experimental results was constructed. The uptake of nitrogen was described by a first-order equation in which the upta...

Sas E.; Maler L., 1989: Olfactory bulb connectivity in a gymnotoid fish with special reference to telencephalic locus coeruleus and raphe inputs. Society for Neuroscience Abstracts 15(1): 927

Buffetaut E., 1983: Wounds on the jaw of an eocene mesosuchian crocodilian as possible evidence for the antiquity of crocodilian intraspecific fighting behavior. Wounds on the lower jaw of a mesosuchian crocodilian (Tilemsisuchus lavocati, Dyrosauridae) from the Eocene of Mali are interpreted as a result of intraspecific fighting. This behavioral feature is known in the males of living crocodilians and rel...

Persat, F.; Noirey, N.; Diana, J.; Gariazzo, M.J.; Schmitt, D.; Picot, S.; Vincent, C., 2003: Binding of live conidia of Aspergillus fumigatus activates in vitro-generated human Langerhans cells via a lectin of galactomannan specificity. Aspergillus fumigatus is the most common aetiological fungus responsible for human pulmonary aspergilloses. This study investigated the primary contact between Langerhans cells (LC), corresponding to dendritic cells present in pulmonary mucosa and...

Race T.M.; Carmichael R.G.; Gasson W.F.; Reeff M.J., 1991: A proactive approach to meeting the animal rights challenge. Transactions of the North American Wildlife & Natural Resources Conference : 423-427

Rogers, H.R.; van den Berg, C.M., 1988: Determination of borate ion-pair stability constants by potentiometry and non-approximative linearization of titration data. Borate anions, B(OH)(-)(4), are known to associate with alkali and alkaline-earth metal cations in sea-water. The borate cation ion-pairs are of the general form MB(OH)((n-1)+)(4), where M(n+) is the cation. In this work, the cation borate stabili...

Muir Thomas G., 1974: Nonlinear Acoustics and Its Role in the Sedimentary Geophysics of the Sea. Marine Science (Plenum) 1: 241-291

Bonadonna, T., 1958: Observations on the histology and examination of wool from Angora goats. Macroscopic and microscopic studies of hair from the Turkish and Texas breeds of Angora goats have indicated a high standard of delicacy and the predominance of marrow-less types. There are no marked differences according to the rate of pigmentati...

Cieza-Díaz, D.E.; Cano-Martínez, N.; Barchino-Ortiz, L.; Longo-Imedio, I., 2013: Extraocular sebaceous carcinoma: a report of 2 cases. Sebaceous carcinoma is a rare, aggressive adnexal tumor of unknown etiology; 75% of these tumors arise in the periocular region while 25% arise at extraocular sites. This cutaneous tumor is a diagnostic sign of Muir-Torre syndrome, a disorder asso...

Shoelson, Steven, 2002: JMM - past and present: Invited comment on W. Ebstein: On the therapy of diabetes mellitus, in particular on the application of sodium salicylate. Journal of Molecular Medicine (Berlin) 80(10): 618-619