Shrimp farmers in Alabama are seeking to increase efficiency and intensify production. Semi‐intensive earthen ponds are the traditional production system used by Alabama shrimp farmers; however, there is interest in evaluating intensive pond‐based production systems, such as split ponds. These alternative systems are more intensive and require higher stocking densities to offset capital investment costs required for initial construction and maintenance. Two trials were carried out with Pacific white shrimp Litopenaeus vannamei using on‐levee flow‐through systems (twelve 800‐L tanks per system) at an Alabama shrimp farm to evaluate stocking densities of 29, 88, 176, and 264 shrimp/m² (trial 1) and higher levels of fish meal (5, 10, and 20%) at a high density of 264 shrimp/m² (trial 2). Results from trial 1 revealed that as stocking density was increased Pacific white shrimp final weight decreased, while shrimp biomass and feed conversion ratio increased. Survival of Pacific white shrimp at the two highest densities (176 and 264 shrimp/m²) was lower than at the two lowest densities (29 and 88 shrimp/m²). There were no significant differences in performance for Pacific white shrimp offered diets with varying levels of fish meal in trial 2; however, overall survival in trial 2, which was carried out at a high density (264 shrimp/m²), ranged between 47.9% and 65.5%.

中文翻译：

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在阿拉巴马州西部低盐度水域养殖的太平洋白对虾凡纳滨对虾集约化养殖的放养密度和膳食鱼粉含量评估

阿拉巴马州的虾农正在寻求提高效率和增加产量。半密集的土池是阿拉巴马州虾农使用的传统生产系统。但是，有兴趣评估基于池塘的集约化生产系统，例如分割池塘。这些替代系统更加密集，并且需要更高的库存密度以抵消初始建设和维护所需的资本投资成本。在阿拉巴马州的一个虾养殖场使用太平洋通流虾对虾凡纳滨对虾进行了两项试验（每个系统十二个800升水箱），以评估虾密度为29、88、176和264虾/ m ²（试验1）和更高的鱼粉含量（5％，10和20％），密度为264虾/米²（试用2）。试验1的结果表明，随着种群密度的增加，太平洋白对虾的最终体重下降，而对虾的生物量和饲料转化率则增加。两种最高密度（176和264虾/ m ²）的太平洋白虾的存活率低于两个最低密度（29和88虾/ m ²）的存活率。在试验2中，太平洋白虾提供的鱼粉水平不同时的日粮性能没有显着差异。但是，试验2的总体存活率较高（密度为264虾/ m ²），介于47.9％至65.5％之间。