Variation in Water Quality at Different Intensive Whiteleg Shrimp, Litopenaeus vannamei, Farms in East Java, Indonesia

摘要

Measurement of nine water quality parameters were performed every two weeks in two shrimp farms for oneproduction cycle, located in Tuban and Probolinggo, East Java Province, Indonesia. The average productivityfor Farm 1 was 17,142.86 kg/ha, with an average size of 17.88 g; while the productivity for Farm 2 was18,333.33 kg/ha, with an average size of 14.36 g. During the shrimp cultivating period, mean values forsalinity, pH and dissolved oxygen (DO) in both the farms were significantly different, whereas temperature inboth the farms was not different. TAN, nitrite and orthophosphate concentrations in both the farms were notdifferent. But for nitrate and TSS, the levels are higher in Farm 2 than in Farm 1. The authors conclude that,compared with Farm 1 (water exchange and earthen pond), Farm 2 (zero-water exchange and lined pond)had significantly higher survival rate and higher environmental profits.