ふとう is the standard on'yomi. 埠 (フ) means wharf or pier, and 頭 (トウ) means head or end, together denoting the structure. ふくとう misreads 埠, and ふとうり/ふよう misread 頭. This term refers to a pier, wharf, or quay, which is a specific structure extending from the shore into the water for ships to load and unload cargo or passengers.

ふとうは標準的な音読みです。埠は「船着き場」、頭は「先端」の意味。船が接岸し、人や貨物を乗り降りさせるための設備です。ふくとうは埠の誤読、ふようは頭の誤読です。