Biosecurity New Zealand is placing legal controls on parts of Aotea Great Barrier Island in a bid to contain the invasive seaweed Caulerpa brachypus, while the local Mana Whenua governance group on Aotea are supporting a dual response by imposing a rāhui over the same areas.
Caulerpa brachypus, which has been found in Blind Bay and Tryphena Harbour, is an Unwanted Organism under the Biosecurity Act and can spread rapidly and create dense mats.
Biosecurity New Zealand’s Director Readiness and Response, John Walsh, says it can be spread to new locations by small fragments and is easily moved by people going about water activities like boating and fishing, including dredging.
On 20 September, Biosecurity New Zealand issued legal controls, known as a Controlled Area Notice (CAN), which make it illegal…