The causes of whale strandings

Authors: Cordes DO
Publication: New Zealand Veterinary Journal, Volume 30, Issue 3, pp 21-24, Mar 1982
Publisher: Taylor and Francis

Animal type: Aquatic animal, Sea mammal, Wildlife
Subject Terms: Behaviour, Environment, Nervous system/neurology, Species description
Article class: Review Article

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Abstract: Strandings of cetaceans (whales and dolphins) is probably the result of a sequence of events rather than a simple cause-and-effect relationship. Strandings of solitary animals are more common than massed and generally thought to be due to severe disease. Mass strandings (three to several hundred individuals) are less common, but very spectacular. Mass strandings are considered to be due to a complex of factors in which behavioural factors are probably important, severe disease making an unimportant, or negligible contribution. There may be interaction of physical conditions (weather, tides, currents, coastline) and biological conditions (predators, feeding, disturbance of echolocation and disease) which result in stranding. One postulated reason for stranding is that it is dependent on instinctive behaviour, deeply located in subcortical areas of the brain, which provokes cetaceans to seek refuge ashore when under stress.

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