Shozo H. Sugiura

TL;DR: Apparent digestibility of protein and availability of minerals in various feed ingredients were determined for coho salmon and rainbow trout using yttrium oxide (Y2O3) as the inert marker and passive feces collection tanks as a fractional net absorption of nutrients from diets.

TL;DR: Apparent availabilities of calcium and phosphorus were greatly affected by citric acid supplementation in rainbow trout but not in goldfish; however, this level of dietary acidification had little effect on the apparent availability of major minerals in fish meal-based diet.

TL;DR: The results of this study suggest that a substantial reduction of phosphorus discharge from fish, poultry and animal farms could be achieved simply by replacing ordinary grains with low-phytate mutant grains in low-ash feeds.

TL;DR: A 20 min heat treatment of SF reduced trypsin inhibitor activity to physiologically insignificant levels, increased protein digestibility, and also allowed a successful 15% substitution of SF for herring meal protein.

TL;DR: A new method was developed to estimate the minimum dietary requirement of phosphorus (P) for large fish for which conventional methods are not suitable, and the response of the fish to dietary P concentration stabilized, and excretion of P remained constant within dietary treatment groups for the subsequent sampling days.