Status and trends analysis of oyster reef habitat in Galveston Bay

Abstract

The purpose of this GBNEP study is to describe the status and trends of oyster populations in Galveston Bay. To do so required the development of a new mapping method designed to discriminate oyster reefs from other bottom types rapidly, accurately, and inexpensively. The method uses an acoustic profiler to differentiate substrate type, a fathometer to assess bottom relief and a global positioning system to accurately establish position. The method has the following desirable traits: can be performed from a small research vessel, usable in most weather conditions, requires only a two-person crew, rapidly discriminates bottom type while underway, usable in shallow (<1m) or deep (>10m) water, and provides accurate and precise navigation.