Thành phần loài bắt gặp và tình hình mắc cạn, cứu hộ cá voi ở vùng biển Việt Nam

Abstract

    Recently, the information on whale population has only been recorded in species composition and not updated in Vietnam for many years. There was a lack of scientific data and investigation on whale stranding and rescue in Vietnam. Based on this basis, the field trips had implemented to assess whale species composition, stranding, and rescue situations from January 2021 to December 2021 in eight coastal provinces of Vietnam. The research results showed that 07 whale species belonging to 4 families and 01 order were updated and recorded, including 43 occurrence times in the coastal regions of Vietnam. Among them, there were 11 times recorded in the events of stranding (25.6%), 28 times recorded in the event of dead drifting (65.1%), 04 times recorded in the event of regular swimming (9.3%), 07 times recorded in the event of successful rescue (63.6%) and 04 times recorded in the event of unsuccessful rescuing (36.4%). The predominant body mass of the stranded whale individuals was from 1,500 to 15,000 kg/individual. Also, the whale individuals were mainly recorded from March to May and October to December. The central region of Vietnam was the most recorded area where whale individuals had been stranded and found annually. This research result is the scientific basis for building a national program on the conservation and rescue of marine mammals in Vietnam.