Gilmore GHRay SMAldrich DVTexas A&M Univ. DMSGTU2010-02-152010-02-151975http://hdl.handle.net/1969.3/23153-Growth and mortality of oysters (Crassostrea virginica Gmelin) with high and low levels of Labyrinthomyxa marine (L) infection were measured during 1972 in 0.1 hectare ponds receiving a continuous flow of heated water from an electric power plant discharge canal. Pond oysters had less cumulative mortality than intake or discharge canal oysters, regardless of Labyrinthomyxa infection. Only pond oysters (high-L and low-L) gained in biomass (increasing 171 and 5,953 g or 2% and 25%, respectively). In the intake canal low-L oysters decreased 6,293 g (27%) in the 10-month period prior to their disappearance while high-L oysters decreased 6,633 g (64%) by the end of the study. Oysters placed in the discharge canal during warm weather died within 6 wk. Oysters held in the ponds grew as well or better than oysters from a natural reef in Galveston BayASW,USA,TexasbiomassCrassostreaCrassostrea virginicaGalveston BaygrowthinfectionLabyrinthomyxa marinalevelsMortalityOysterspondsQ5 01505 Prevention and controlShellfish cultureTexasthermal aquacultureThermal pollutionwaterWeatherReport