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The combined effects of temperature and salinity on the respiratory rate of female Euterpina acutifrons were determined for copepods from North Inlet estuary, Georgetown (USA). Results showed an increase in metabolic rates with increasing temperature over the range 15–25°C,
decreasing at 30°C, in all salinities used. Highest Q10 values were obtained over the range 20–25°C, except at 55‰ S. At all temperatures used, rates were generally lower in the extreme salinities (15 and 55‰), and highest in 35‰ S. Temperature
and salinity effects were significant at a level of less than 1%. A comparison of results from this study with similar studies on a population of E. acutifrons from southern Brazil suggests that different annual thermal regimes affecting the two populations may also influence capability
for metabolic regulation over a wide range of salinities.
The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.