Biological zero point in hybrid Pacific abalone

摘要

The biologic zero point (BZP) of hybrid Pacific abalone Haliotis discus hannai (China) and Haliotis discus discus (Japan) at temperatures of 16 degrees C, 20 degrees C, and 22 degrees C was calculated from the developmental hatching rate, formation of larval retractor muscle, 90 degree torsion and formation of epipodial tentacles. BZP for the early development of hybrid Pacific abalone is 6.22 degrees C, which is an important result for the hybrid breeding of Pacific abalone.