Original scientific paper
WATER QUALITY FLUCTUATIONS IN WHITELEG SHRIMP (Litopenaeus vannamei) CULTIVATION DURING THE DRY AND RAINY SEASONS
2023, 81 (3) p. 0-0
Abstract
Season and water quality are essential indicators in the life cycle of pond ecosystems. The season is a natural factor that affects the level of water quality dynamics in shrimp cultivation activities in ponds. This study aims to evaluate the dynamics of differences in water quality parameters in intensive Litopenaeus vannamei ponds during the dry and rainy seasons. This current study applied an ex-pose facto causal design based on actual conditions in the field. During the rainy season, the water quality parameters values tended to fluctuate dynamically, with the parameters of phosphate (PO4), nitrite (NO2), and Total Organic Matter (TOM) exceeding the threshold value of the water quality standard for aquaculture, with a PO4 value of 0.734 mg/L, a NO2 of 0.180 mg/L, and a TOM of 101.29 mg/L. In the dry season, the water quality parameters remained stable, with only the phosphate parameter showing a value above the water quality standard threshold of 0.633 mg/L. Based on the trend of fluctuations in the two seasons, a model of the equation Y = 3.979 + 0.814x was made with a significance value <α (0.05), meaning that the two seasons positively correlate with the impact on fluctuations in water quality in ponds. The results of dynamic modelling analysis showed contradictions in water quality and nutrients during the rainy and dry seasons. Water quality parameters in intensive L. vannamei cultivation during the dry and rainy seasons fluctuated dynamically and differed according to the character of the weather conditions and the current season.