Effects of water pH and calcium concentration on ion balance in fish of the Rio Negro, Amazon.

@article{Gonzalez1998EffectsOW,
  title={Effects of water pH and calcium concentration on ion balance in fish of the Rio Negro, Amazon.},
  author={Rodolfo Gonzalez and Chris M Wood and Rod W Wilson and Marjorie L. Patrick and Harold L. Bergman and Annie M Narahara and Adalberto Luis Val},
  journal={Physiological zoology},
  year={1998},
  volume={71 1},
  pages={
          15-22
        }
}
We examined the effects of acute low-pH exposure on ion balance (Na+, Cl-, K+) in several species of fish captured from the Rio Negro, a dilute, acidic tributary of the Amazon. At pH 5.5 (untreated Rio Negro water), the four Rio Negro species tested (piranha preta, Serrasalmus rhombeus; piranha branca, Serrasalmus cf. holandi; aracu, Leporinus fasciatus; and pacu, Myleus sp.) were at or near ion balance; upon exposure to pH 3.5, while Na+ and Cl- loss rates became significant, they were… CONTINUE READING

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