Effect of salinity on the temperature preference and tolerance of age-0 mayan cichlids

Jay R. Stauffer, Suzanne E. Boltz

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

We measured the salinity tolerance, temperature tolerance, and preferred temperature of the Mayan cichlid Cichlasoma urophthalmus to determine if temperature and salinity would limit the range expansion of this introduced species in Florida. Salinity tolerance at 25°C exceeded 37‰. The upper and lower ultimate lethal temperatures in freshwater were 39 and 15°C, respectively. Acclimation to 15‰ salinity had no effect on the lower incipient lethal temperature (15°C). Thermal preference determined in a horizontal temperature gradient was 32.8°C in freshwater, 39.2°C at 15‰, and 26.9°C at 30‰ salinity. Our results indicated that temperature and salinity are not likely to limit range expansion of the Mayan cichlid from its present location in the southern portion of the Everglades National Park, but that the species’ spread may be blocked by cold winter temperatures in north Florida.

Original languageEnglish (US)
Pages (from-to)101-107
Number of pages7
JournalTransactions of the American Fisheries Society
Volume123
Issue number1
DOIs
StatePublished - Jan 1994

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science

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