溶解氧和饲料磷调节虹鳟（Oncorhynchus mykiss）养殖中磷的利用和排放分配。

Dissolved oxygen and dietary phosphorus modulate utilization and effluent partitioning of phosphorus in rainbow trout (Oncorhynchus mykiss) aquaculture.

作者信息

McDaniel Nichole K, Sugiura Shozo H, Kehler Thomas, Fletcher John W, Coloso Relicardo M, Weis Peddrick, Ferraris Ronaldo P

机构信息

Department of Pharmacology and Physiology, UMDNJ-New Jersey Medical School, 185 South Orange Avenue, Newark, NJ 07103-2714, USA.

出版信息

Environ Pollut. 2005 Nov;138(2):350-7. doi: 10.1016/j.envpol.2005.03.004.

DOI:10.1016/j.envpol.2005.03.004

PMID:15941611

Abstract

Phosphorus (P) is the limiting nutrient in freshwater primary production, and excessive levels cause premature eutrophication. P levels in aquaculture effluents are now tightly regulated. Increasing our understanding of waste P partitioning into soluble, particulate, and settleable fractions is important in the management of effluent P. When water supply is limited, dissolved oxygen concentration (DO) decreases below the optimum levels. Therefore, we studied effects of DO (6 and 10mg/L) and dietary P (0.7 and 1.0% P) on rainbow trout growth, P utilization, and effluent P partitioning. Biomass increased by 40% after 3 weeks. DO at 10mg/L significantly increased fish growth and feed efficiency, and increased the amount of P in the soluble fraction of the effluent. Soluble effluent P was greater in fish fed 1.0% P. DO increases fish growth and modulates P partitioning in aquaculture effluent.

摘要

磷（P）是淡水初级生产中的限制性营养素，过量的磷会导致过早富营养化。现在对水产养殖废水的磷含量有严格的规定。加深我们对废水中磷分配到可溶、颗粒和可沉降部分的理解，对于废水磷的管理很重要。当供水量有限时，溶解氧浓度（DO）会降至最佳水平以下。因此，我们研究了溶解氧（6毫克/升和10毫克/升）和饲料磷（0.7%和1.0%的磷）对虹鳟鱼生长、磷利用率和废水磷分配的影响。3周后生物量增加了40%。10毫克/升的溶解氧显著提高了鱼的生长和饲料效率，并增加了废水中可溶部分的磷含量。喂食1.0%磷的鱼产生的可溶废水磷更多。溶解氧可促进水产养殖中鱼的生长并调节废水磷的分配。