LIFE CYCLE AND MIGRATION
Many of our freshwater fish send part of their life in the sea. This migration between freshwater and sea is called Diadromy. There are three main groups
ANAdromy
These species spend most of their adult life in the sea. Migrating up fresh waterways to spawn. The larvae are then washed back to the ocean to mature and grow. Examples: Lamprey - Kanakana and Salmon
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page 8 NIWA / Climate Change Vulnerability Assessment_Report Summary
Catadromy
Fish are born in saltwater, then migrate into freshwater as juveniles, where they grow into adults before migrating back into the ocean to spawn. Examples: Eels, Black flounder
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AMPHIDROMY
Fish are born in freshwater/estuaries, then drift into the ocean as larvae before migrating back into freshwater to grow into adults and spawn. Examples: Whitebait, Galaxias and Torrentfish, Inanga
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Stages of development