They are caught and supplied mainly as byproducts of the whaling carried out as scientific whaling, and berardius was captured in the small-scale whaling of certain types of whales including dolphins.
供給源は主に捕鯨日本における捕鯨の副産物で、ツチクジラに関しては捕鯨日本における捕鯨での漁業捕獲である。