3 ideas
A rāhui is a restriction placed by a person with authority over a resource, such as a fishing ground, forest or bird-snaring tree, that suspends taking for a set period. Its force rests on tapu and communal respect rather than external enforcement, so a depleted or polluted resource can recover before harvesting resumes. Restraint is built into the rhythm of use instead of being a permanent ban.
Through whakapapa, birds, fish, trees and people descend from the same atua, such as Tāne of the forest and Tangaroa of the sea. Taking a bird or felling a tree is therefore an act between relatives, which is why it calls for karakia (ritual incantation), the offering of first catches, and care in how the harvest is taken. Seen this way, conservation is a set of obligations owed to kin rather than an abstract duty to protect a resource.
Planting, fishing and bird-taking are timed by the maramataka, a lunar calendar that names each night of the moon and rates it as productive or unproductive for particular tasks. It is cross-checked against tohu, which are natural indicators such as a certain tree flowering, a star rising, or birds fattening on ripening berries. Decisions come from observing linked cycles rather than following fixed calendar dates.