Penaeus monodon (Fabricius) production related to water quality in East Java, Indonesia

On two shrimp farms in East Java, Indonesia, a total of 16 tambaks stocked with Penaeus monodon (Fabricius) were monitored for water quality during one growing season. The water quality parameter values were compared with production characteristics. Ranges of parameter values remained between acceptable reference values. Influences of farm, tambak and time on water quality were significant. Tambak production was explained for 25% by water transparency. Observed water quality parameter values could not be a reason for recently described decreased production. Therefore, other factors should be investigated.