What is tight packing in slavery and why did this practice emerge?

Two philosophies dominated the loading of a slave ship. "Loose packing" provided for fewer slaves per ship in the hopes that a greater percentage of the cargo would arrive alive. "Tight packing" captains believed that more slaves, despite higher casualties, would yield a greater profit at the trading block.

"Tight packing" captains believed that more slaves, despite higher casualties, would yield a greater profit at the trading block.