Use of Pyropia spheroplasts as alive food substitute for culturing Japanese short-neck clam Ruditapes philippinarum

摘要

A new dietary ingredient "Pyropia spheroplasts (PS)" was prepared from Pyropia yezoensis through enzymatic treatment. Four diets (PS inclusion levels of1%, 2% and 3% body weight basis, and live diatom Chaetoceros calcitrans) were fed to the three replicate groups of clams for 9 weeks in a flow-through system. Significantly higher survival was obtained in all PS dietary groups (P< 0.05). PS level2% showed higher carcass weignt compared to the other PS diets and was not different than control(尸〉0.05). Results indicate PS to be a good candidate for a substitute to live food for culturing short-neck clams.