Digestibility of dehulled lupine meal, corn distiller’s dried grain with solubles and de-fatted soybean meal for orange-spotted grouper Epinephelus coioides

ABSTRACT Our study investigated the apparent digestibility coefficients (ADCs) of corn distiller’s dried grains with solubles (DDGS), dehulled lupine meal (DHLM) and de-fatted soybean meal (DSBM) for orange-spotted grouper Epinephelus coioides. The ADCcp of DHLM (97%) was the highest while the ADCcp of DDGS (90%) was similar to that of DSBM (89%). Digestible protein (DP) of DHLM (523 g kg−1) was significantly higher than that of DSBM (495 g kg−1) while DP of DDGS (457 g kg−1) was the lowest. We found no difference in digestible energy (DE) between DSBM (17.53 MJ kg−1) and DHLM (16.99 MJ kg−1) while DE of DDGS (15.77 MJ kg−1) was also the lowest. The relationship between fiber class and ADCs suggested that reducing fiber class in DHLM and DDGS should be helpful for the orange-spotted grouper’s digestibility.