Abstract
In domestic ducks acclimated to 2% saltwater (SW ducks), chronic elevations of plasma osmolality and sodium concentration, and of the circulating levels of antidiretic hormone and angiotensin II indicate a trend towards dehydration when compared to ducks maintained on freshwater (FW ducks). Under steady state conditions of salt and water balance, with prevailing antidiuresis and no salt gland secretion, the apparent volumes of distribution of22Na and of radiolabeled inulin were calculated after single injections of the tracers. The sodium spaces as percent body mass of FW ducks (33.3±0.9) and SW ducks (31.5±0.5) were not different, but apparent volumes for inulin distribution differed significantly between FW ducks (31.2±0.7) and SW ducks (24.8±0.7). Plasma volumes and rates of inulin, disappearance from the plasma during both the non-uniform and uniform phases of tracer distribution were closely similar in FW and SW ducks and support the hypothesis that the difference between apparent volumes of inulin distribution reflects a difference in extracellular fluid volume which was estimated as 20.9% in FW ducks and 17.2% in SW ducks. For SW ducks the difference between inulin and sodium spaces was significantly greater than for FW ducks. In relation to the extracellular fluid compartment SW ducks have a larger pool of non-extracellular, exchangeable sodium.
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References
Bouverot P, Hildwein G, LeGoff D (1974) Evaporative water loss, respiratory pattern, gas exchange and acid base balance during thermal panting in Pekin ducks exposed to moderate heat. respir Physiol 21:255–269
Bradley EL, Holmes WN (1971) The effects of hypophysectomy on adrenocortical function in the duck (Anas platyrhynchos). J Endocrinol 49:437–457
Erbe KH, Gray DA, Simon E (1985) Parallel changes of angiotensin II (A II), aldosterone (Ald) and antidiuretic hormone (ADH) induced by hypovolemia and hyponatremia in ducks (abstr.). Pflügers Arch (Suppl) 403:R18
Gellai M, Edwards BR, Valtin H (1979) Urinary concentrating ability during dehydration in the absence of vasopressin. Am J Physiol 237:F100-F104
Gray DA, Simon E (1983) Mammalian and avian antidiuretic hormone: studies related to possible species variation in osmoregulatory systems. J Comp Physiol 151:241–246
Gray DA, Simon E (1985) Control of, plasma angiotensin II in a bird with salt glands. Gen Comp Endocrinol 60:1–13
Gray DA, Hammel HT, Simon E (1986) Osmoregulatory effects of angiotensin II in a bird with salt glands (Anas platyrhynchos). J Comp Physiol 156:315–321
Haack D, Möhring J, Möhring B, Petri M, Hackenthal E (1977) Comparative study on development of corticosterone and DOCA hypertension. Am J Physiol 233:F403-F411
Hall JE, Guyton AC, Farr BM (1977) A single-injection method for measuring glomerular filtration rate. Am J Physiol 232:F72-F76
Harris KM, Koike TI (1975) Apparent volume of distribution of125Iothalamate and inulin in chickens. Proc Soc Exp Biol Med 149:242–247
Kaul R, Simon E (1983) Apparent volume of distribution of22Na in Pekin ducks (abstr.) Naunyn-Schmiedeberg's Arch 322:R19
Manning RD Jr, Guyton AC (1980) Dynamics of fluid distribution between the blood and interstitium during overhydration. Am J Physiol 238:H645-H651
Möhring B, Möhring J, Dauda Gy, Haack D (1974) Potassium deficiency in rats with hereditary diabetes insipidus. Am J Physiol 227:916–920
Möhring J, Kohrs, G, Möhring B, Petri M, Homsky E, Haack D (1978) Effects of prolonged vasopressin treatment in Brattleboro rats with diabetes insipidus. Am J Physiol 234:F106-F111
Möhring J, Schoun J, Simon-Oppermann Ch, Simon E (1980) Radioimmunoassay for arginine vasotocin (AVT) in serum of Pekin ducks: AVT concentratioin after adaptation to freshwater and saltwater. Pflügers Arch 387:91–97
Norman LR Jr, Coleman TG, Wiley TL Jr, Guyton AC (1975) Separate roles of sodium ion concentration and fluid volume in salt loading hypertension in sheep. Am J Physiol 229:1068–1072
Roberts JR, Hughes MR (1984) Exchangeable sodium pool size and sodium turnover in freshwater- and saltwater-acclimated ducks and gulls. Can J Zool 62:2142–2145
Robinson DH, Konrad KP, Edwards BR (1984) Comparison of body fluid compartment sizes in Brattleboro homozygous and Long Evans rats. Am J Physiol 247:F234-F239
Ruch FE, Hughes MR (1975) The effects of hypertonic sodium chloride injection on body water distribution in ducks (Anas platyrhynchos), gulls (Larus glaucescens) and roosters (Gallus domesticus). Comp Biochem Physiol 52A:21–28
Simon E (1982) The osmoregulatory system of birds with salt glands. Comp Biochem Physiol 71A:547–556
Szczepanska-Sadowska E, Simon-Oppermann Ch, Gray DA, Simon E (1985) Blood pressure and arginine vasotocin in normanatremic and hypernatremic ducks. Basic Res Cardiol 80:116–125
Trippodo NC, Walsh GM, Frohlich ED (1978) Fluid volumes during onset of spontaneous hypertension. Am J Physiol 235:H52-H55
Trippodo NC, Walsh GM, Ferrone RH, Dugan RC (1979) Fluid partition and cardiac output in volume-depleted goldblatt hypertensive rats. Am J Physiol 237:H18-H24
Young DB, Pan, YJ, Guyton, AC (1977) Control of extracellular sodium concentration by antidiuretic hormone — thirst feedback mechanism. Am J Physiol 232:R145-R149
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Gray, D.A., Kaul, R., Brummermann, M. et al. Dissociation between apparent volumes of distribution for inulin and sodium by salt adaptation in ducks. Pflugers Arch. 409, 422–426 (1987). https://doi.org/10.1007/BF00583797
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DOI: https://doi.org/10.1007/BF00583797