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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.