In Cumberland Sound, adult females and males reach mean lengths of 362 cm (11.9 ft) and 428 cm (14.0 ft) respectively and weigh from 800 to 1000 kg (1750 - 2200 Ibs). The peak breeding season appears to occur in May with calves being born in late July or early August after a gestation period of about 14.5 months. The oldest female and male sampled from the catch in Cumberland Sound to date are 26 and 24 years respectively. In many stocks, belugas can live to be 35 – 40 years of age.
Belugas occupy mostly the western side of the Cumberland Sound in spring and early autumn. In summer, they are found mainly in Clearwater Fiord and adjacent bays where they are reported to feed on a variety of fish and invertebrate species. Based on recent results obtained from satellite-tagging studies, belugas spend most of their time in the centre of the Sound in late autumn, then move to the eastern side near the mouth of the Sound in early winter.
During the late autumn and early winter belugas dive to depths of 300 m or more in the middle of Cumberland Sound, likely to feed on deep-water species such as Greenland halibut, also known as turbot.... Read More