Activity related cost of osmoregulation in the juvenile snook (Centropomus undecimalis)

M. A. Perez-Pinzon, P. L. Lutz

Research output: Contribution to journalArticlepeer-review

28 Scopus citations


While at rest the snook were able to osmoregulate effectively over the range of freshwater to seawater, but in freshwater, swimming fish had the lowest physiological fitness, as evidenced by a reduced aerobic scope, and at the highest speeds (5-6 bl/s), a greatly increased muscle lactate, increased hematocrit, and an increase in plasma osmotic pressure. Freshwater fish also appeared to have a reduced capacity for handling stress. Resting or routinely active fish have sufficient energy reserves to cope with a wide range of salinities. These reserves are diminished during maximal exercise such that stamina is compromised in suboptimal salinities. -from Authors

Original languageEnglish (US)
Pages (from-to)58-66
Number of pages9
JournalBulletin of Marine Science
Issue number1
StatePublished - Jan 1 1991
Externally publishedYes

ASJC Scopus subject areas

  • Oceanography
  • Aquatic Science


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