Application of pond water quality data for the management of Tiger shrimp intensive cultured: Case study of Ranot district, Songkhla province
1994
Putth Songsangjinda | Kanit Chaiyakam (National Inst. of Coastal Aquaculture, Songkhla (Thailand))
Study of an application of pond water quality data for the management of tiger shrimp intensive culture was conducted using data from 52 ponds studied during 1990-1992 in Ranot district, Songkhla province. The objective of this study is to establish the best Multiple Linear Regression Model to explain the variation of shrimp production. Water quality data was grouped by growout period into 5 groups as follow : 0-20,20-40,40-60,60-80 and 80-100 percent of growout period. Water quality variables of all groups used in the model were dissolved oxygen (mg/l), pH, transparency (cm),nitrite (mg/l), total ammonia (mg/l) biochemical oxygen demand (mg/l) and chlorophyll a content (micro g/l). Growout variables used in the model were stocking density (indv/square m),weight (g), survival (percent) and harvested standing crop (kg/square m). Weight and survival were the most importance factors to determine shrimp production. Multiple Linear Regression Model of dependent variables weight, survival and growout period was established using water quality variables in each growout period, survival and harvested standing crop as independence variable. R-square were 0.89,0.95 and 0.78 at the level of P=0.011,0.001 and 0.039 for model of weight, survival and growout period respectively. The result of this study was obtained several guide lines of water quality in each growout period for the predicted production of 500-1,000, 1,000-1,500, 1,500-2,000 and over 2,000 kg/rai when post larvae of shrimp were stocked at the density of 30-120 indv/square m.
Mostrar más [+] Menos [-]Palabras clave de AGROVOC
Información bibliográfica
Este registro bibliográfico ha sido proporcionado por Kasetsart University