Chamberlain GWStrawn K Avault JW2010-02-152010-02-151979 197http://hdl.handle.net/1969.3/23141-348Atlantic croaker (Micropogon undulatus ) and striped mullet (Mugil cephalus ) were cultured in cages in the intake area, at the head of the discharge canal, and at 3 locations in the cooling lake of a power plant near upper Galveston Bay, Texas, from 1 Feb 1976 to 20 Aug 1976 to assess the suitability of each location for mariculture. Interpretations were based on daily measurements of 6 hydrological parameters and survival and growth of fish. Primary sources of mortality included high effluent temperatures, abrupt changes in conductivity, and lymphocystis. Growth rates of fed Atlantic croaker were strongly related to water temperature. Regression procedures were used to develop a polynomial function to describe the parabolic relationship between growth rate of croaker and mean monthly water temperature. The curve described indicated no growth at temperatures below about 13.5 C or above about 33.5 C and maximum growth near 27 C. This information might be valuable in selecting optimum locations for culture of Atlantic croaker or related fishes within thermally heterogeneous environments. Growth rates of unfed striped mullet were not related to water temperature but were linearly related to pH and dissolved oxygen, which were probably indicators of primary production. However, the growth of mullet was poor even at the most productive location; consequently, the use of unfed caged mullet to harvest phytoplankton does not seem feasible unless the primary productivity levels are considerably higher than those in the study areaASW,USA,TexasAtlantic croakerCage cultureDissolveddissolved oxygenEnvironmental effectsEnvironmentsfishfish cultureGalveston Baygrowthgrowth rateheadlevelsmeasurementMicropogon undulatusMortalityMugil cephalusMugilidaeOxygenPhytoplanktonPiscesprimary productionprimary productivityproductionQ1 01582 Fish cultureSciaenidaeSurvivalTemperatureTexasthermal aquacultureUSAusewaterwater temperatureCONF