Chemistry of the body fluids of the coelacanth, Latimeria chalumnae

@article{Griffith1980ChemistryOT,
  title={Chemistry of the body fluids of the coelacanth, Latimeria chalumnae},
  author={Robert W. Griffith},
  journal={Proceedings of the Royal Society of London. Series B. Biological Sciences},
  year={1980},
  volume={208},
  pages={329 - 347}
}
  • R. W. Griffith
  • Published 17 July 1980
  • Biology
  • Proceedings of the Royal Society of London. Series B. Biological Sciences
The coelacanth, Latimeria chalumnae, possesses a blood chemistry that is nearly identical to that of the elasmobranch fishes and contrasts with that of the bony fishes and tetrapods. Especially notable is the retention of high concentrations of urea (377 mM) and of trimethylamine oxide (122 mM), which aid in raising the blood osmolarity (942 mosm/I) to close to that of the sea water environment. These features also characterize other coelacanth body fluids, such as the notochordal fluid… 

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References

SHOWING 1-10 OF 55 REFERENCES

Composition of fluid from the notochordal canal of the coelacanth, Latimeria chalumnae.

Significantly or suggestively lower levels of sodium, magnesium, calcium, bicarbonate, sulfate, total carbohydrates, glucose, lactate, cholesterol, bound phosphate and total proteins were found in notochordal fluid than in serum, whereas potassium, chloride, urea, trimethylamine oxide, and total free amino acids were higher and inorganic phosphorus essentially identical.

OSMOTIC CONSTITUENTS OF THE COELACANTH LATIMERIA CHALUMNAE SMITH

Samples of blood, bile, muscle and liver from a frozen specimen of the coelacanth Latimeria chalumnae were analyzed for ions and nonprotein nitrogenous compounds and the effect of prolonged freezing on the electrolyte distribution of the perch Perca fluviatillis was made.

Osmotic constitutents of the blood plasma and parietal muscle of Squalus acanthias L.

An attempt is made to outline the sea water-plasma and plasma muscle steady states by comprehensive analyses of muscle and plasma of specimens of the spiny dogfish Squalus acanthias.

Serum Osmolality in the Coelacanth, Latimeria chalumnae: Urea Retention and Ion Regulation

Samples of blood (hemolyzed) were obtained from the renal vein, the hepatic portal vein, and the heart of a freshly thawed specimen of Latimeria chalumnae and the magnesium value for the aqueous humor was used to correct the abnormally high concentrations in the hemolyzed serum.

Serum composition of the coelacanth, Latimeria chalumnae Smith.

Blood serum of the coelacanth, Latimeria chalumnae, lacks a protein component with a mobility approaching that of human serum albumin, and evolutionary implications of the similarity ofLatimeria serum chemistry to that of other marine fishes are discussed.

Composition of bladder urine of the coelacanth, Latimeria chalumnae

Major inorganic electrolytes and organic solutes were measured in urine obtained from the bladder of a live specimen of the coelacanth, Latimeria chalumnae, and the results were compared with data on

Muscle Proteins of the Coelacanth Latimeria Chalumnae Smith

A comparison of the sarcoplasmic proteins of red and white muscle by starch-gel electrophoresis revealed that the differentiation observed in the coelacanth was similar to that occurring in the carp, and a study of the low-molecular-weight proteins of white muscle and of the myofibrillar proteins shows the expected differences between the two muscle types.

Bile salts of the lungfishes Lepidosiren, Neoceratodus and Protopterus and those of the coelacanth Latimeria chalumnae Smith.

Comparison of the alcohols suggest that Latimeria stands biochemically outside the animal group which includes the Dipnoi, and all four primitive osteiychtheans have some amphibian affinities.

THE ABSORPTION AND EXCRETION OF WATER AND SALTS BY MARINE TELEOSTS

It is a peculiar and interesting fact that marine teleosts excrete urine which is isotonic or hypotonic with respect to the blood, and therefore of considerably lower osmotic pressure than sea water
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