Hatchery broodstock ponds

Broodstock are cultured in earthen ponds. Normally, hatcheries have many potential broodstock ponds and a smaller number of conditioning and maturation culture ponds (Rg. 16.7). On average, about eight (range 3-25) ponds are used for maintaining the large number of potential broodfish. The ponds are around 0.16 ha (from 0.02-3.0 ha) and 3-4 m deep. 

Ponds, spring, increasing photoperiod (->LD14 10) and temperature (15 20 °C 1-2000 degree days). Hormone induction also routinely used for broodstock transferred to the hatchery... 

Broodstock sources include pond (domesticated) and wild collected. Le and Le (2010) found that 78.1 % of hatcheries were using domesticated broodstock (collected from grow-out ponds), 6.3% using wild-collected broodstock and 15.6 % using both sources. There is a clear trend towards in the increased use of pond reared broodstock. Belton et aL (2010) reported in detail on broodstock procurement and concluded that broodstock could be sourced from extensive grow-out, export-orientated grow-out, capture... 

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