TY - JOUR AU - Ortega-Salas, A. A. AU - Rendón M., L. A. PY - 2013/05/22 Y2 - 2024/03/28 TI - Hyper-intensive farming white shrimp Litopenaeus vannamei (Decapoda: Penaeidae) in a seawater tank under semi-controlled conditions JF - UNED Research Journal JA - URJ VL - 5 IS - 1 SE - Articles DO - 10.22458/urj.v5i1.249 UR - https://revistas.uned.ac.cr/index.php/cuadernos/article/view/249 SP - 69-74 AB - <p class="p1">Shrimp development to a commercial size in high density culture saves food and avoids predators and disease. Our study was conducted to calculate the growth of white shrimp <em>Litopenaeus vannamei </em>by hyper-intensive cultivation under semi-controlled conditions. We seeded at a density of 550 shrimp per m<span class="s2">3 </span>during the first cycle and 400 shrimp per m<span class="s2">3 </span>in the second cycle in an outdoor tank of 6m<span class="s2">3</span>or 6m<span class="s2">2 </span>covered with mesh, constant aeration. The shrimp were fed <em>Artemia franciscana </em>during the first two weeks and <em>camaronina </em>pellets (35% protein) as required, in food baskets, aftterwards. The temperature ranged from 22,3 to 31,3°C, pH 7,5-8,7, oxygen 4,26±1,43. The tanks are siphoned of debris every other day, and water was replaced according to a program. The food conversion ratio (FCR) was 1:1,3. The shrimp were measured weekly to calculate growth with the Bertalanffy model. Survival in the first cycle was 95,8 ( 97,9% for the second cycle). Population parameters (maximum likelihood method) for the first cycle were k=0,0301, L∞ =322,16 and t<span class="s2">0 </span>=-0,8852; second cycle: k=0,0203, L∞ =294,42 and t<span class="s2">0 </span>=-5,3771. There was rapid growth during the first 10 weeks. Biomass was 27kg for the first cycle (second: 16kg). </p><p class="p2"><strong>KEY WORDS</strong></p><p class="p2"><strong></strong>Growth, high density, survival, biomass, semi-controlled conditions.</p><p class="p2"> </p> ER -