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The second episode in our four-part series Saving the Ocean in which we look at the impact of climate change, overfishing and pollution on ocean environments, and examine the scientific solutions to some of those issues. Presented by Joel Werner from the Australian broadcaster ABC Radio National, the series focuses on the improvements both for marine life and the people who depend on oceans for their livelihoods.

In this second programme Joel looks at plans to help conserve sharks in the waters around remote Pacific islands. A shark fin export trade to Asia has provided a lucrative but ultimately unsustainable income for the islanders. And he visits New Zealand, where a high-tech solution has been designed to help sustainably harvest a different valuable export commodity - marine snails. A high demand from Asia for this delicacy has endangered the snails. Joel hears how digital technology is being used to track them to ensure there are enough left to breed. He also sees what tracking technology is revealing about how seabirds are affected by commercial fishing practices.

(Image: Paua fishermen examine their catch. 主播大秀 copyright)