How do cameras on shark fins reveal new hunting behaviours?

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Cameras on Shark Fins Reveal Novel Hunting Behaviours in Kelp Forests

Cameras attached to the dorsal fins of great white sharks have provided the first filmed evidence of these predators actively hunting prey within dense kelp forests. This footage contradicts previous assumptions that these environments were inaccessible to sharks, revealing their ability to manoeuvre and increase hunting activity in the presence of seals. The study observed sharks spending a significant portion of their time in kelp forests adjacent to seal colonies, challenging the notion that these areas served solely as refuges for seals.
Evidence of Hunting in Kelp Forests

The new study, utilising motion sensor tags equipped with cameras, has captured great white sharks actively hunting in kelp forests. Previously, research suggested that great whites primarily employed deep-water ambush tactics at dawn or dusk, remaining hidden below unsuspecting seals. However, the recent footage demonstrates sharks increasing their activity levels specifically when seals were present within the kelp, indicating a shift in hunting strategies.
Shark Agility and Mobility in Kelp

Contrary to expectations, the cameras recorded sharks navigating the kelp fronds with remarkable ease and without any apparent reduction in mobility. The filmed sharks were observed making sharp turns and increasing their speed when closing in on seals, suggesting that the dense underwater vegetation did not impede their predatory movements. This agility within the kelp forests was a surprising finding for the researchers.
Increased Time Spent in Kelp Habitats

The data collected from the shark-mounted cameras indicates that great white sharks spent approximately 20% of their observed time within kelp forests located near seal colonies. This finding suggests that these areas, once thought to be inhospitable or avoided by sharks, are in fact utilised for hunting. The presence of a large seal population in these regions likely contributes to the sharks' increased activity and time spent in these environments.

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How do cameras on shark fins reveal new hunting behaviours?

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