Effects of dietary phosphorus and lipid levels on utilization and excretion of phosphorus and nitrogen by rainbow trout (Oncorhynchus mykiss). 1. Laboratory-scale study
By J. A. Green, R. Hardy, E. Brannon. 2002
85 citations recorded by the source corpus.
In a 8-week production-scale experiment at a commercial trout farm, the effects of dietary lipid level and phosphorus level on phosphorus (P) and nitrogen (N) utilization of rainbow trout (initial mean weight 99 g) were assessed. A low-phosphorus, high-lipid experimental diet (457 g protein, 315 g lipid, 9.1 g P kg–1 dry diet) was compared with a commonly used commercial diet (484 g protein, 173 g lipid, 13.6 g P kg–1 dry diet). P and N budgets were constructed using data from the production-scale experiment and digestibility data for the two diets. In addition, orthophosphate and ammonia-N waste were measured in effluent over one 24-h period. Relative to the commercial diet, the experimental diet resulted in significantly increased feed efficiency ratio, N retention and P retention, and substantially reduced dissolved, solid and total P waste (g kg–1 dry feed). Although N retention resulting from the experimental diet was higher, this was attributable to higher N (protein) digestibility of the experimental diet. Solid N waste (g kg–1 dry feed) resulting from the experimental diet was substantially lower, but dissolved N waste (g kg–1 dry feed) was not significantly different relative to the commercial diet. Mean effluent orthophosphate production (mg day–1 kg–1 fish) of fish fed the experimental diet was substantially lower than that of fish fed the commercial diet (P < 0.05), but effluent ammonia-N production (mg day–1 kg–1 fish) was not significantly affected by dietary treatment.
Subfields: Aquatic Science, Immunology, Nature and Landscape Conservation
View Paper: https://www.semanticscholar.org/paper/9138edb8a9e070cdbc17bf86babe528f9a2b793a
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Aquatic Science
In Immunology
In Nature and Landscape Conservation
Citations in the corpus
- Aquaculture Production and Biodiversity Conservation (2009, background): “Similarly, the protein level and phosphorous content of feed were often much higher than necessary ( Green et al. 2002 ).”
- Inclusion of fish bone and crab by-products in diets for Atlantic cod, Gadus morhua (2006, background): “Earlier work has shown decreased retention of phosphorus with increased phosphorus levels in the diets for rainbow trout (Green et al., 2002) and salmon (Storebakken et al., 2000).”