Evaluation of the digestible value of lupin and soybean protein concentrates and isolates when fed to rainbow trout, Oncorhynchus mykiss, using either stripping or settlement faecal collection methods

A series of prototype protein concentrate and isolate products were prepared from the kernel meals of Lupinus angustifolius (cv. Gungarru) and Lupinus luteus (cv. Wodjil). The apparent digestible value of these value-added meals, the original kernel meals and a range of similar soybean based products were compared when fed to rainbow trout. Both faecal stripping and settlement collection methods were used to allow a comparison of the effects of...