Anchovy seed production w/ SISP

According to the my log in Aug. 30, I produced anchovy juvenile with SIPS (Semi Intensive Seed production) and it harvested at Day 52 (52 days post hatch-out) on Sept. 24, 2011. We collected 258 juveniles (TL 41.7 mm, SL 35.4 mm, BW 0.31 g) and survival rate shows 1.5 %. Average water temperature shows 16.8 C during the culture period (75 days).

Raw sea water introduced to tank (60 tons concrete rectangle) at 50 % of volume through 1 mm mesh bag net in July 11. The water are supplied gradually and filled up to 60 tons within  a week and during this time agricultural fertilizers (Nitrate 3 ppm and Phosphate 0.5 ppm) are applied four times to increase phytoplankton bloom. The water color changed to green at first week and then it sift to brown one. Even so, the transparency never reached to less than 1m. Several species of Copepods are bloomed from 7th week and those are observed that accumulated at surface during the morning time.

 

Anchovy broodstock (TL 20 cm approximately) were captured near Iquique by special net and those are brought to Universidad Arturo Prat Ciencia del Mar Campo Hyaiquique in July 31. The fish spawned same night due to stress of handling and it show 80 % of hatch-out rate. The larvae16,771 (D1) were stocked, 24th day of culture, in the tank in Aug. 4. ORIGO-Green and ORIGO-Culture (Skretting) were fed, 100g daily, 3 weeks time from the stocking. Rearing water become clear due to less phytoplankton blooming and macro-algae were growth. We harvest juvenile (D52) and transfer to nursery tank (1 ton, squarer) in Sept. 24, 2011.