A Physiological Study of the Changes in Mustelus Canis Produced by Modifications in the Molecular Concentration of the External Medium

Scott, George G.

doi:10.1111/j.1749-6632.1914.tb56937.x

Cited by 11 publications

(4 citation statements)

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“…Average concentrations of some inorganic solutes in plasma of various elasmobranchs * Scott (1913) reported 246 mEq. of Cl per liter for M. canis and Chaisson and Friedman ( 1933-34) a 260 mEq.…”

Section: Table IImentioning

confidence: 99%

“…peated often (Fredericq, 1904;Carrey, 1905;Bottazzi, 1906;Scott, 1913;Smith, 1936). In shallow waters, such as those generally used for collection of experimental animals, the environmental solute concentration may fluctuate depending upon (among other factors) the season, height of tide, location, depth of water, and time of day.…”

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confidence: 99%

“…Thus, one could expect that the freezing point depression (total osmolality) of elasmobranch blood would vary depending upon the environment (see Table I). Experiments by Scott (1913) demonstrated that the urea of the blood was not the only solute to be affected by an environmental concentration change ; sharks immersed in hypo-osmotic environments lost chloride, probably via the gills. Smith and Smith (1931) reported that the blood of fresh-water elasmobranchs contains decidedly less urea and chloride than that of marine elasmobranchs.…”

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confidence: 99%

“…Many investigators have measured the blood urea nitrogen (BUN) of elasmobranchs. As one could expect from what has been said above, the values range widely: from 750 mg.% (Scott, 1913) to 1100 mg.% (Smith, 1929) Synonymies have been checked in Schroeder (1948, 1953}. In some cases the freezing point has been calculated from data expressed as milli Osmoles/Kg. Denis (1913Denis ( , 1922, Smith (1929), and Cohen et al (1958).…”

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confidence: 99%

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Chemical Anatomy of the Pericardial and Perivisceral Fluids of the Stingray, Dasyatis Americana

Bernard

Wynn

1966

The Biological Bulletin

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The significance of the observation by Staedeler and Frerichs (1858) of "colossale Quantitaten" of urea in the blood and tissues of some skates and a shark remained obscure for four decades. In 1897 Bottazzi reported that the freezing point depressions of elasmobranch blood and of sea water were approximately equal, that is, they had approximately the same total solute particle, or osmolal, concentrations. But whereas sodium and chloride make up the bulk of solute particles in sea water, Rodier (1899) observed that urea accounted for about one-third of the solute particles of elsamobranch blood. Rodier also noted that the freezing point depression of the fish blood was generally slightly greater than that of the animal's sea-water environment, an observation which has been re-

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Section: Table IImentioning

confidence: 99%

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confidence: 99%

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confidence: 99%