IV-90 



to 90°F. Intertidal oysters in the warm climate of Texas survive a 

 number of hours out of the water with internal temperatures of as 

 much as 120°F. This oyster ceases feeding when temperatures fall 

 below 43°F. or rise above 107°F. Oysters spawn only when the tempera- 

 ture of the water rises above 68°F., whether in Long Island Sound or 

 Apalachicola Bay. In its southern range the oyster has a much 

 longer spawning period and feeds all year long. 



