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Comparing traditional and modern methods of kākahi translocation: implications for ecological restoration

A. McEwan,Aaria Dobson-Waitere,J. Shima

Published 2020 in New Zealand Journal of Marine and Freshwater Research

ABSTRACT

ABSTRACT Handling methods are an important determinant of translocation success. In Aotearoa/New Zealand, tangata whenua traditionally used insulated kete to translocate aquatic animals to new environments as part of ahumoana tawhito (ancient aquaculture). In this study we investigated the influence of three transport methods (traditional [flax kete], modern [bucket], and a hybrid of the two [bucket with flax support structures]) on the short-term performance (burrowing speed) of kākahi (freshwater mussels). We also tested whether assisted release (planting kākahi in the substrate) resulted in enhanced burrowing speeds. Kākahi that were transported using the traditional method were slower to begin probing the substrate, but there was no difference in overall burrowing speed. We also found that assisted release resulted in faster burrowing speeds. We conclude that handling and release procedures can influence the short-term performance of translocated kākahi, and we recommend procedures for future translocation projects, including transporting animals in immersion vessels where practical, and planting them at the release site

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