Behaviour
These cetaceans are highly sociable and they regularly form small groups, or pods, that may contain between two and 25 individuals, with an average of 10 members. Pods tend to be unstable, meaning individuals tend to move from pod to pod. Radio tracking has shown belugas can start out in one pod and within a few days be hundreds of miles away from that pod. These pods contain animals of both sexes, and are led by a dominant male. Many hundreds and even thousands of individuals can be present when the pods join together in river estuaries during the summer. This can represent a significant proportion of the total population and when they are most vulnerable to being hunted.
They are cooperative animals and frequently hunt in coordinated groups. The animals in a pod are very sociable and they often chase each other as if they are playing or fighting, and they often rub up against each other.
In captivity, they can be seen to be constantly playing, vocalizing and swimming around each other. They show a great deal of curiosity towards humans and frequently approach the windows in the tanks to observe them. Belugas may also playfully spit at humans or other whales. It is not unusual for an aquarium handler to be drenched by one of his charges. Some researchers believe spitting originated with blowing sand away from crustaceans at the sea bottom.
Belugas also show a great degree of curiosity towards humans in the wild, and they frequently swim alongside boats. They also play with objects they find in the water; in the wild they do this with wood, plants, dead fish and with bubbles they have created. During the breeding season, adults have been observed carrying objects such as plants, nets and even the skeleton of a dead reindeer on their heads and backs. Captive females have also been observed displaying this behaviour, carrying items such as floats and buoys, after they have lost a calf; experts consider this interaction with the objects could be acting as a substitute behaviour.
Read more about this topic: Beluga Whale
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