Ullah, Md. Ekram creator Lin, Chang Kwei Chairperson Little, David C. Examination Committee Hambrey, John B. Examination committee Government of Bangladesh/ Asian Development Bank (ADB) Scholarship donor text th Bangkok Asian Institute of Technology 1995 monographic eng

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70 leaves + 1 online resource Three short experiments were conducted to determine the survival of Penaeus monodon postlarvae (PL20 ) in abrupt change to salinities from seawater ( 35 ppt) to freshwater and through 5 ppt and 1 ppt stepwise dilution over a period of 4-7 hours. The abrupt change of salinity resulted in 100 % mortality, while 100 3 survival was recorded at 1 ppt when the animals were allowed to stay relatively longer period of acclimation with minimum ranges of salinity changes. Following the survival test, shrimps were reared at different 2 salinities (0 , 1 , 2, 3, 4 and 20 ppt) for 75 days at a density of 40 shrimps/m in closed system. Results obtained from the rearing trials showed that growth and survival were not significantly different among the treatments. Near est mean weight was obtained from all the test salinities ranging from 6 . 06 ±. 38 g at 20 ppt and 6.62 ± .27 g at 4 ppt. The overall survival was low ( 30-40 %} registering the highest at 0 ppt and the lowest at 3 ppt. The apparent FCR values varied from 2. 5 to 2 . 9 among the treatments. Temperature ( 0 c), dissolved oxygen (mg/l), and pH played no significant difference within the treatments but total NH3 -N (mg/l) and TSS (mg/l) concentrations were significantly higher in treatment 1 ( 20 ppt) than the rest of the treatments A Thesis Submitted in Partial Fulfilment of the Requirement for the Degree of Master of Science, School of Environment, Resources, and Development Thesis (M.Sc.) - Asian Institute of Technology, 1995 Penaeus monodon Shrimp culture Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B15216 http://203.159.5.9/ait-thesis/detail.php?q=B15216 130598 20260817161414.0