Distribution of alfonsino Beryx splendens eggs in the spawning ground around the sea mounts off Izu islands, middle Japan

Many alfonsino eggs that had not been collected in the sea were collected in the expected spawning ground around Izu Islands off central Japan from June to August, 1993. The eggs were collected in 5 sampling areas. Most eggs were collected from 2 to 6 a.m., and most were in the Morula to embryo-appearance stages. A few of the most developed eggs which were just about to hatch were collected around the spawning ground. More eggs were collected by a 0-250m tow than by a 0-100m tow, suggesting that the eggs gradually diffused from the spawning ground as development proceeded.