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Cold tolerance of the banana prawn Penaeus merguiensis de Man and its growth at different temperatures
- Hoang, T., Lee, S.Y., Keenan, C.P., Marsden, G.E.
- Aquaculture research 2002 v.33 no.1 pp. 21-26
- cold tolerance, water temperature, acclimation, overwintering, ponds, Fenneropenaeus merguiensis
- Critical thermal minima (CTMin) were determined for subadults of Penaeus merguiensis acclimated at 15, 18, 21 and 24 degrees C for 3 weeks. The effect of cooling rate on CTMin was also investigated. The CTMin of prawns from these respective acclimation groups were 5.3, 6.0, 7.4, 9.0 and 4.7, 5.4, 6.0, 7.3 degrees C at the cooling rate of 1 degree C h(-1) and 3 degrees C h(-1) respectively. Both acclimation temperature and cooling rate had a significant effect (P < 0.01) on the CTMin. Observation during the acclimation period showed that the growth rate of prawns acclimated at 24 degrees C was much higher than those acclimated at 21, 18 and 15 degrees C. The results indicate that P. merguiensis can overwinter in aquaculture ponds in south-east Queensland, Australia, or other subtropical areas and attain good growth if simple overwintering facilities are available.