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Home / Rotorua Daily Post

Studying how to get rid of the catfish pest that’s wrecking Te Arawa’s pristine waterways

By Waimanea Nuri
Whakaata Māori·
7 Mar, 2023 09:14 PM2 mins to read

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Amohia Peka has an opportunity to further her education. Photo / Whakaata Māori

Amohia Peka has an opportunity to further her education. Photo / Whakaata Māori

A summer internship with Te Arawa Lakes Trust has inspired a rangatahi Māori to learn more about reducing the number of catfish in Te Arawa lakes.

Amohia Peka (Ngāti Pikiao) has been awarded the chance to extend her education and study for a master’s degree to “characterise the normal reproductive physiological cycle of brown bullhead catfish in New Zealand and examine juvenile rearing and sexual differentiation”.

Peka says she is excited to contribute to the tireless efforts made by Bay of Plenty Regional Council and Niwa to aid in decreasing the number of catfish that affect the native residents of the area’s lakes and rivers.

“I am excited and happy to have been awarded this grant and to be able to do work like this. I’ve always lived around water, whether that be by the ocean or our lakes, I have always had love and passion when it comes to protecting our wai.”

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Her master’s thesis will focus on the natural reproductive cycle of catfish, and she hopes this will assist her and her colleagues in understanding why they reproduce so much and what they can do to reduce the populations of catfish in Te Arawa.

“Lake Rotoiti and Lake Rotorua have a big catfish incursion. By looking at the reproductive cycle, we will be able to understand and put in place systems that will then help the decrease in our regions.

“What this means is, we are hoping to look into hormonal treatments to try to [sterilise] the species, meaning to hopefully gain control of the catfish population and, although it won’t happen overnight, our efforts will hopefully one day make a difference.”

Peka is ready and has already started her studies, and gives thanks to her whānau who have helped her along the way.

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“My mum inspires me to do this mahi. She supports and assists her whānau, iwi and hapū, and that is what I hope to do with my mahi. Although it is in a different field of mahi, I hope to help and encourage others to join in and help our awa and roto too.”

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