Farming freshwater prawns A manual for the culture of ... - eXtension

4. Hatchery phase 35
4.1 Buildings and equipment facilities 36
Basic site and building requirements 36
Equipment and the distribution of water and air 37
4.2 Hatchery management 54
Water treatment 54
Starting your larval batch 55
Routine work 57
Feeding 60
Hygiene, health and management problems 65
Monitoring performance 70
The greenwater system of freshwater prawn culture 73
4.3 Harvesting postlarvae 73
5. Postlarval holding and nursery phases 75
5.1 Basic requirements and facilities 75
Holding tanks 75
Indoor (primary) nursery facilities 75
Outdoor (secondary) nursery facilities 76
Nursery cages 77
5.2 Holding postlarvae before sale 77
5.3 Transporting postlarvae 78
5.4 Managing nurseries 80
Indoor (primary) nurseries 80
Outdoor (secondary) nurseries 82
Other systems 83
6. Grow-out phase 85
6.1 Site requirements and construction 85
Defining the pond 86
Supplying water to the ponds 90
Discharging water from the ponds 95
Aeration 96
Miscellaneous 97
6.2 Management of the grow-out phase 99
Size variation 100
Semi-intensive monoculture in tropical zones 100
Monoculture in temperate zones 108
Polyculture and integrated culture 111
6.3 Feeding and fertilization 114
TABLE OF CONTENTS
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