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Sharks often swim across national borders. Our conservation efforts must travel with them
Magazine article   Open access

Sharks often swim across national borders. Our conservation efforts must travel with them

Diego F Bezerra, Daniel Dunn and Ross G Dwyer
The Conversation, Vol.24 September 2026
2026
Appears in  The Conversation
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Abstract

Almost 11,000 kilometres. That’s how far one white shark swam while travelling from South Africa to Western Australia, before turning around and returning home. In the waters off southern Australia, school sharks can cover up to 3,000 kilometres while crossing the Tasman Sea to New Zealand. Many shark and ray species embark on mammoth migrations. But to protect these species, we need to know not only how far an animal moves, but whether it crosses national borders. Our new study analysed 30 years of shark and ray movement studies. We uncovered major gaps in our understanding of where these species go during their migrations.

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