Sperm whales dive deepest of all whales. They have been found entangled in submarine cables at depths of 1000m and more, recorded by sonar at depths of 2000m and there is even evidence of dives to more than 3000m. During dives the whales reduce their heart rate, limit blood flow to the heart and brain and collapse their lungs, offsetting the potentially damaging effects of diving to such depths. Off Kaikoura, where a deep canyon comes within several kilometres of the coast, the whales dive to depths of about 1000 metres in their search for giant squid. Photos: Craig Potton
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https://paperspast.natlib.govt.nz/periodicals/FORBI19901101.2.12.3
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Forest and Bird, Volume 21, Issue 4, 1 November 1990, Unnumbered Page
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Tapeke kupu
100Sperm whales dive deepest of all whales. They have been found entangled in submarine cables at depths of 1000m and more, recorded by sonar at depths of 2000m and there is even evidence of dives to more than 3000m. During dives the whales reduce their heart rate, limit blood flow to the heart and brain and collapse their lungs, offsetting the potentially damaging effects of diving to such depths. Off Kaikoura, where a deep canyon comes within several kilometres of the coast, the whales dive to depths of about 1000 metres in their search for giant squid. Photos: Craig Potton Forest and Bird, Volume 21, Issue 4, 1 November 1990, Unnumbered Page
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