Premium
Stocking strategies for production of Litopenaeus vannamei (Boone) in amended freshwater in inland ponds
Author(s) -
Green Bartholomew W
Publication year - 2008
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.2007.01849.x
Subject(s) - shrimp , litopenaeus , stocking , biology , salinity , zoology , fishery , seawater , nutrient , potassium , ecology , chemistry , organic chemistry
Abstract The performance of the Pacific white shrimp Litopenaeus vannamei (Boone) under various stocking strategies was evaluated in earthen ponds filled with freshwater amended with major ions. Six 0.1‐ha earthen ponds located in Pine Bluff, AR, USA, were filled with freshwater in 2003 and 2004, and potassium magnesium sulphate added to provide 50 mg K + L −1 and stock salt added to provide 0.5 g L −1 salinity. In 2003, three ponds either were stocked with PL 15 shrimp (39 PL m −2 ) for 125 days of grow out or with PL 25 shrimp for 55 days (23 PL m −2 ) followed by a 65‐day (28 PL m −2 ) grow‐out period. In 2004, ponds were stocked with 7, 13 or 30 PL 15 m −2 for 134 days of grow out. Salinity averaged 0.7 g L −1 during both years, and concentration of SO 4 −2 , K + , Ca 2+ and Mg 2+ was higher, and Na + and Cl − was lower in amended pond water than in seawater at 0.7 g L −1 salinity. Potassium concentration in amended water was 52–61% of the target concentration. Shrimp yields ranged from 3449 kg ha −1 in 2003 to 4966 kg ha −1 in 2004 in ponds stocked with 30–39 PL 15 m −2 for a 125–134‐day culture period. At harvest, mean individual weight ranged from 17.1 to 19.3 g shrimp −1 . In ponds stocked with PL 25 shrimp, yields averaged 988 and 2462 kg ha −1 for the 1st and 2nd grow‐out periods respectively. Gross shrimp yield in 2004 increased linearly from 1379–4966 kg ha −1 with increased stocking rate. These experiments demonstrated that L. vannamei can be grown successfully in freshwater supplemented with major ions to a final salinity of 0.7 g L −1 .