describe the two ways zaroff accumulates his quarry

Zaroff accumulates his quarry whn ships are driven into the rocks...... when he fails to accumulate his quarry in this way, he helps fate along by drawing ships to the lights he flashes from the island. The flashing lights indicate the presence of a channel..... a place that ships can safely enter. Unfortunately, there is no safe channel, only treacherous rocks.

The general's left eyelid fluttered down in a wink. "This island is called Ship Trap," he answered. "Sometimes an angry god of the high seas sends them to me. Sometimes, when Providence is not so kind, I help Providence a bit. Come to the window with me."

Rainsford went to the window and looked out toward the sea.

"Watch! Out there!" exclaimed the general, pointing into the night. Rainsford's eyes saw only blackness, and then, as the general pressed a button, far out to sea Rainsford saw the flash of lights.