AI SearchThe effect of temperature and salinity on penaeus monodon postlarvae, with observations on commercial hatchery techniques in relation to postlarval quality
Call Number: AIT Thesis no. AE-89-44 Material type:
SeriesSeries: Asian Institute of Technology. Thesis ; no. AE-89-44Publication details: Bangkok : Asian Institute of Technology, 1989Description: 97 pSubject(s): Online resources: Dissertation note: Thesis (M.Sc.) - Asian Institute of Technology, 1989 Summary: In an attempt to understand the role of temperature and salinity on the survival, tolerance, behaviour and growth of Penaeus monodon postlarvae, 72- hour static water survival tests and a 3-week growth trial were conducted. On- farm observations were also made in a commercial hatchery to aid in assessing relationships between production techniques and postlarval quality. It has been found that in general, ~ monodon postlarvae, age PL.2o to PL.4o possess broad tolerance to salinity from 5-40 ppt and to temperature in the range 20- 36 "C. Results al so revealed that a 48- hour acclimation to low (10 ppt ) and high ( 36 ppt ) salinity can extend the tolerance range to 5 - 50 ppt and postpone time to 1 ethal doses ( LD!i o ) in concentratians beyond the range of tolerance i . e. 0 , 2 and 55 ppt. Specific combinations of salinity and temperature showed strong influence of temperature on postlarval salinity tolerance . Extreme levels of temperature ( 20-22"C and 37-39°C) served to narrow the salinity tolerance range and accelerate time to LD5o. Moreover, temperature at a maintained salinity in the range of 20- 36 ppt showed a more distinct effect on survival and growth than salinity changes at a particular temperature . A combination of low salinity ( 20 ppt) and high temperature ( 34- 36 °c) promoted the fastest growth with a weight gain of 117 mgs and the best food utilization. However, a combination of low salinity ( 20 ppt ) and 10111 temperature (28- 30°C) appeared best for survival.
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A thesis submittted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development
Thesis (M.Sc.) - Asian Institute of Technology, 1989
In an attempt to understand the role of temperature and salinity on the survival, tolerance, behaviour and growth of Penaeus monodon postlarvae, 72- hour static water survival tests and a 3-week growth trial were conducted. On- farm observations were also made in a commercial hatchery to aid in assessing relationships between production techniques and postlarval quality. It has been found that in general, ~ monodon postlarvae, age PL.2o to PL.4o possess broad tolerance to salinity from 5-40 ppt and to temperature in the range 20- 36 "C. Results al so revealed that a 48- hour acclimation to low (10 ppt ) and high ( 36 ppt ) salinity can extend the tolerance range to 5 - 50 ppt and postpone time to 1 ethal doses ( LD!i o ) in concentratians beyond the range of tolerance i . e. 0 , 2 and 55 ppt. Specific combinations of salinity and temperature showed strong influence of temperature on postlarval salinity tolerance . Extreme levels of temperature ( 20-22"C and 37-39°C) served to narrow the salinity tolerance range and accelerate time to LD5o. Moreover, temperature at a maintained salinity in the range of 20- 36 ppt showed a more distinct effect on survival and growth than salinity changes at a particular temperature . A combination of low salinity ( 20 ppt) and high temperature ( 34- 36 °c) promoted the fastest growth with a weight gain of 117 mgs and the best food utilization. However, a combination of low salinity ( 20 ppt ) and 10111 temperature (28- 30°C) appeared best for survival.
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