Figure 37. — Mean salinity (single figure) and salinity range (two figures) in estuaries from Ochlockonee Bay 



to Pensacola Bay. See text for sources of data. 



the southern oyster drill, Thais haemastoma, and 

 several other invertebrates (Chapman, 1955; 

 Menzel and Nichy, 1958; Nichy and Menzel, 

 1960). Infestation by the fungus Dermocysti- 

 dium marinum also causes mortality under cer- 

 tain conditions (Dawson, 1955c). The prospec- 

 tive oyster grower can find answers to many 

 questions in a State of Florida manual on oyster 



culture that describes the oyster's life history, 

 its natural enemies and diseases, legal aspects 

 of leasing bay bottoms, and estimated costs of 

 the business (Ingle and Whitfield, 1962). 



The Oyster Division of the Florida Depart- 

 ment of Natural Resources provided us with 

 maps of oyster beds in Apalachicola Bay and 

 St. George Sound, legal descriptions of oyster 



86 



