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

38. Overhead air and water distribution systems 76
39. Substrates 77
40. Pond with standpipe drain 77
41. Transporting postlarvae 79
42. Substrate in a larval tank 81
43. Large freshwater prawn farm 86
44. Pond bottom profiles 87
45. Improving pond banks 88
46. Angles of pond bank slope 89
47. Erosion 89
48. Grass on pond banks 89
49. Pond banks with integrated agriculture 90
50. Increasing dissolved oxygen levels in incoming water 91
51. Simple gravel filters 91
52. Water distribution system to ponds 92
53. Supplying water by gravity 93
54. Grass minimizes erosion 93
55. Controlling water entry 94
56. Outlet structure 95
57. Cast netting 96
58. Draining 97
59. Screening pond outlets 98-99
60. Long-tail pump 99
61. Long-tail pump being used 99
62. Paddlewheel aerator 100
63. Long-shaft aerator 100
64. Long-shaft aerator in action 101
65. Pond sedimentation 104
66. Tilling the pond bottom 105
67. Juvenile prawns 106
68. Acclimatizing prawns before stocking 107
69. Releasing prawns during stocking 108
70. Weeds invade shallow areas 108
71. Close-up of pond substrate 109
72. Substrates placed vertically 109
73. Substrates placed horizontally 110
74. Integrated freshwater prawn farming 114
75. Catching wild postlarvae 116
76. Feed distribution 120
77. Observing feed consumption 120
78. Measuring transparency 122
79. Simple gravel filter 123
80. Protection from overland predators 123
81. Large BC Macrobrachium rosenbergii being measured 127
82. Relationship between total length and weight 127
83. Seining 131
84. Double seining 132
85. Multiple seining 133
86. Sorting prawns 133
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