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Modeling of waste outputs in the aquatic environment from a commercial cage farm under neotropical climate conditions
Aquaculture Environment Interactions ( IF 2.2 ) Pub Date : 2023-05-25 , DOI: 10.3354/aei00457
GW Bueno 1 , FEM Bernal 2 , R Roubach 3 , JO Skipper Skipper-Horton 4 , FG Sampaio 5 , NS Fialho 1 , DP Bureau 4
Affiliation  

ABSTRACT: The present study used a bioenergetics modeling approach to estimate the solid and dissolved waste outputs of a Nile tilapia Oreochromis niloticus net-cage farm. Historical production data for 30 cages were obtained from a commercial farm in the Chavantes Reservoir, São Paulo State, Brazil. In addition, an experiment was carried out in 4 net-cages at the farm to validate this dataset and collect fish samples. A total of 32400 tilapias with an initial weight averaging 35 ± 2.73 g were equally distributed in the experimental net cages. After 210 d, the fish showed a final individual weight of ~789 ± 5.12 g. Fish growth performance was monitored, and body composition was analyzed each month. Digestibility trials of commercial diets used for juvenile stages JVI and JVII and market weight were performed. Relationships of body weight with body content data of water, protein, fat, ash, gross energy, phosphorus, and nitrogen were evaluated by regression analysis. The total digestible energy requirement and estimated residues of the fish were assessed using the factorial bioenergetics model, adapted to the growing conditions of a neotropical reservoir. The model estimated ~320 kg of total solid waste released per tonne of tilapia, including ~10 kg of solid nitrogen and ~5 kg of solid phosphorus. Approximately 3 and 47 kg of dissolved phosphorus and nitrogen, respectively, were estimated per tonne of tilapia. The bioenergetics model is a valuable and equitable method for assessing and monitoring waste outputs. It can improve the nutritional and environmental efficiency of aquaculture activities, helping producers to reduce feed costs while strengthening the environmental sustainability of aquaculture.

中文翻译:

新热带气候条件下商业网箱养殖场水生环境中废物输出的建模

摘要:本研究使用生物能学建模方法来估计尼罗罗非鱼Oreochromis niloticus的固体和溶解废物输出网箱养殖场。30 个网箱的历史生产数据来自巴西圣保罗州查万提斯水库的一个商业农场。此外,在农场的 4 个网箱中进行了一项实验,以验证该数据集并收集鱼类样本。共有 32400 条初始重量平均为 35±2.73 g 的罗非鱼平均分布在实验网箱中。210 天后,鱼的最终个体重量约为 789 ± 5.12 克。监测鱼的生长性能,每月分析身体成分。对用于幼年 JVI 和 JVII 阶段以及上市体重的商业日粮进行了消化率试验。通过回归分析评估体重与水、蛋白质、脂肪、灰分、总能、磷和氮的身体含量数据的关系。使用适合新热带水库生长条件的阶乘生物能量学模型评估鱼的总可消化能量需求和估计的残留物。该模型估计每吨罗非鱼释放的固体废物总量约为 320 千克,包括约 10 千克固体氮和约 5 千克固体磷。据估计,每吨罗非鱼分别含有约 3 公斤和 47 公斤溶解磷和氮。生物能学模型是评估和监测废物输出的一种有价值且公平的方法。它可以提高水产养殖活动的营养和环境效率,帮助生产者降低饲料成本,同时加强水产养殖的环境可持续性。适应新热带水库的生长条件。该模型估计每吨罗非鱼释放的固体废物总量约为 320 千克,包括约 10 千克固体氮和约 5 千克固体磷。据估计,每吨罗非鱼分别含有约 3 公斤和 47 公斤溶解磷和氮。生物能学模型是评估和监测废物输出的一种有价值且公平的方法。它可以提高水产养殖活动的营养和环境效率,帮助生产者降低饲料成本,同时加强水产养殖的环境可持续性。适应新热带水库的生长条件。该模型估计每吨罗非鱼释放的固体废物总量约为 320 千克,包括约 10 千克固体氮和约 5 千克固体磷。据估计,每吨罗非鱼分别含有约 3 公斤和 47 公斤溶解磷和氮。生物能学模型是评估和监测废物输出的一种有价值且公平的方法。它可以提高水产养殖活动的营养和环境效率,帮助生产者降低饲料成本,同时加强水产养殖的环境可持续性。据估计,每吨罗非鱼分别含有约 3 公斤和 47 公斤溶解磷和氮。生物能学模型是评估和监测废物输出的一种有价值且公平的方法。它可以提高水产养殖活动的营养和环境效率,帮助生产者降低饲料成本,同时加强水产养殖的环境可持续性。据估计,每吨罗非鱼分别含有约 3 公斤和 47 公斤溶解磷和氮。生物能学模型是评估和监测废物输出的一种有价值且公平的方法。它可以提高水产养殖活动的营养和环境效率,帮助生产者降低饲料成本,同时加强水产养殖的环境可持续性。
更新日期:2023-05-25
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