In a 1991 publication on cetaceans, the International Union for Conservation of Nature and Natural Resources listed the main threats to dolphins as being commercial takes, destruction of their habitats, pollution, and incidental takes.
在國際自然及自然資源保育聯盟（簡稱 IUCN）於一九九一年出版的鯨類書籍中，列舉目前威脅海豚族群的因素，主要是直接捕捉、棲地破壞、環境汙染和魚網的意外捕獲。