Some analyses on the modern whaling catch history of the western North Pacific stock of gray whales (Eschrichtius robustus), with special reference to the Ulsan whaling ground

This study analysed post-1900 published and unpublished records of gray whales in the western North Pacific. Modern whaling recorded a peak annual catch 100-200 1910s, followed by rapid decline 1920s 1930s continued low level (perhaps 10-20 whales/year) for over 40 years to l960s. Catches made during last phase could have been major factor suppressing recovery until recently. There are reasons believe that this whale stock breeds Hainan waters.