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Tools
https://niwa.co.nz/our-science/freshwater/tools/guide-to-restoring-freshwater-native-fish/tools
Stocking fish
https://niwa.co.nz/our-science/freshwater/tools/guide-to-restoring-freshwater-native-fish/tools/stocking-fish
Poor recruitment
https://niwa.co.nz/our-science/freshwater/tools/guide-to-restoring-freshwater-native-fish/identifying-the-problem/poor-recruitment