Calcium and Other Ions in Blood and Skeleton of Nicaraguan Fresh-Water Shark

The bull shark, Carcharhinus leucas, employing archaic but effective means of regulating the physical-chemical composition of its body fluids, thrives in tropical fresh-water rivers and lakes. The ionic strength of the serum and the concentrations of total solutes, calcium, urea, and other ions are below the levels found in marine elasmobranchs but higher than the levels in teleosts. The patterns of the calcium deposits of the vertebrae are identical in marine and fresh-water subspecies.

• Publication year

  1962

• Venue

  Science

• Publication date

  1962-09-21

• Fields of study

  Biology, Medicine, Environmental Science

• Identifiers
  DOI 10.1126/SCIENCE.137.3534.984-APMID 13923921
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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