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Have there been any recorded mass die-off events involving Corbicula fluminea in New Zealand’s waterways, and what assessment, if any, has been made of the likelihood of such events occurring?

Answered Question 2931 (2026)
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Asked by

Jo Luxton

List MP · Labour Party

Question

  • Have there been any recorded mass die-off events involving Corbicula fluminea in New Zealand’s waterways, and what assessment, if any, has been made of the likelihood of such events occurring?

Answered by

Hon Andrew Hoggard

List MP · ACT Party · Minister for Biosecurity

Answer

I am advised that Earth Sciences New Zealand have recorded some die off events, which are currently under investigation. Earth Sciences New Zealand are undertaking a Ministry of Business, Innovation and Employment-funded programme of research to determine Corbicula fluminea’s ecological, social, cultural, and economic impacts in New Zealand; predict its spread for early detection and targeted intervention; and develop practical control methods for established populations.