Abstract

COLLACO, Fátima L.; SARTOR, Sílvia M.  and  BARBIERIA, Edison. Use of GIS for defining areas for the cultivation of oysters in the estuarine region of Cananéia, São Paulo, Brazil. RGCI [online]. 2015, vol.15, n.2, pp.193-207. ISSN 1646-8872.  https://doi.org/10.5894/rgci527.

Most traditional fish stocks is declining as a result of the expansion of human activities in the coastal zone, providing other forms of food production and generation of income, such as mariculture. In this scenario, the development of management tools for coastal zone has become necessary, since its absence can cause irreparable damage to coastal environments and aquatic life. GIS techniques have been widely used in various economic and governmental activities, providing adequate information for planning and management of projects and territories. When applied consistently, these techniques can contribute to the sustainability of aquaculture area. The aim of this study was to develop an instrument for planning mariculture through the use of GIS for the cultivation of oysters in the estuarine region of Cananeia. The data obtained through literature searches, current Brazilian legislation, environmental agencies, Nautical chart, restitution of satellite images and field collections were organized into a manager geographic database. These data were then analyzed using geostatistical interpolation, analysis of distance and density analysis, allowing a favorable or ideal definition for areas of cultivation of oyster Crassostrea brasiliana. After this procedure the following maps were drawn: map of environmental navigation routes, map of conflicting uses,map of conflicts with the interests of the conservation units, social economic map, logistic map, map of potential form ariculture. In preparing Geographical Database, the environmental, socialeconomic and logistic were taken into consideration. The study pointed out areas conductive to the cultivation with good quality of water, which are not yet exploredby the activities that can be used for mariculture.This work developed a structure of geographic database, which will be available to decision makers and shellfishermen in the region, which may be updated when new data become available.

Keywords : GIS; São Paulo; mariculture; oyster farm; coastal management.

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