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Mudfish relocation disastrous

Mudfish relocated from the Daleton Farm site. PHOTO/FILE

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The tale of Carterton’s endangered mudfish has taken a tragic turn.

After spending an estimated $120,000 relocating more than 900 mudfish from the Daleton Farm area earmarked for wastewater storage reservoirs – work that delayed construction work for weeks – Carterton District Council has revealed many of the fish have not survived the move.

More than 900 brown mudfish were rehomed over December and January and council officers have been carrying out well-being surveys on the fish in their new home.

“Despite continuous efforts by the council officers, volunteers and ecologists, the surveys have indicated a significant portion of the rehomed population may not have survived the transition,” the council said.

“As a result, the council has continued in its efforts to trap any remaining mudfish still present in the original habitat.”

More than 100 mudfish have been caught and are being temporarily homed in a small holding pool while the council works with Greater Wellington Regional Council to identify the best option for a more permanent home.

A further 70 mudfish have been rehomed at a downstream property “which has been identified as more suitable than the onsite wetlands”.

It is not clear how many of the originally relocated fish have survived.

“Due to the nature of the habitat, establishing exact survival rates or population numbers is not feasible,” the council said.

Mayor John Booth said the news was disappointing given the work put in by council staff, regional council staff and volunteers.

“If we’ve had some loss it is quite frustrating given the enormous amount of work that went into help these little guys survive,” Booth said.

“When you get mortality with anything it is always sad.”

Booth said the discovery of the mudfish had prompted discussion in the district, and he had received several reports of mudfish in other areas.

“I think one thing that it has done is increase awareness of what you can find out there in terms of indigenous species,” he said.

Carterton District Council’s Infrastructure, Services and Regulatory manager, Dave Gittings, said the project was continuing despite the “complexities of the mudfish relocation”.

“It is very important that the council continues to do the right thing by working with GWRC on the well-being of the mudfish, which fall under the same protection classification as the kiwi.

“We would like to thank and acknowledge the huge effort from all the volunteers, both individuals and Mangaterere Restoration Society members, who were a major part of the rehoming effort over the December-January period.”

As the project progresses, the council says it will recover any remaining mudfish it finds, as well as monitoring the rehomed population.


  1. You say significant numbers have not survived but also establishing survival rates is not feasible. Somewhat contradictory. What is considered to be significant?

    I do understand any mortality is sad but it does seem irresponsible reporting to only give enough information for people to feel it may have been a huge expense for little result.

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