TY  - SER
AU  - Baybay,Lurraine H.
AU  - Machintosh,Donald J.
AU  - Lin,Chang Kwei
AU  - Little,David C.
ED  - The United Kingdom, 
TI  - The effect of temperature and salinity on penaeus monodon postlarvae, with observations on commercial hatchery techniques in relation to postlarval quality
T2  - Thesis
PY  - 1989///
CY  - Bangkok
PB  - Asian Institute of Technology
KW  - Shrimp culture
N1  - 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
N2  - 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
UR  - http://203.159.5.9/ait-thesis/detail.php?q=B17895
ER  -