MPI - NZFFD Fish Spawning Habitats

Various types of fish species live and spawn their eggs during different times of the year in freshwaters of New Zealand. The species have evolved to depend on the unique ecological conditions of their habitat. Therefore, they are vulnerable to any impact on their habitat. Any activity such as logging the riparian trees on the sides of rivers or the surrounding forest can impact the existence of these fish species. The objective of this analysis was to find parts of rivers that are used by various fish species for spawning. MPI needs to know that, so that it can regulate forest logging on the immediate sides of those rivers. The restrictions on logging apply when one or two conditions as below are established: A. The river reach (or segment) is within 1 km upstream or downstream of any NZFFD sample (this layer) B. The river reach has an associated probability of greater than 50 % for at least one fish species (the predictive layer: a separate layer to this one) This dataset was revised in July 2019 and was published following Gazette in November 2020. For more information visit: https://www.mpi.govt.nz/forestry/national-environmental-standards-plantation-forestry/fish-spawning-indicator多种鱼类栖息于新西兰淡水水域，并于一年中的不同时段产卵。这些物种已演化出依赖栖息地独特生态条件的生存策略，因此其存续极易受到栖息地扰动的影响。诸如河岸林木采伐或周边森林开发等活动，均可能对这些鱼类的生存造成威胁。 本次分析的目标是识别出各类鱼类用于产卵的河道区段。新西兰初级产业部（Ministry for Primary Industries, MPI）需要掌握该信息，以便对相关河道周边的林木采伐活动实施监管。 当满足以下任一条件时，将启动采伐限制措施： A. 该河道段位于任意新西兰淡水鱼类数据库（New Zealand Freshwater Fish Database, NZFFD）采样点（即本数据集图层）上下游1公里范围内； B. 该河道段对应至少一种鱼类的产卵概率超过50%（该产卵概率预测图层为独立于本数据集的另一图层）。 本数据集于2019年7月完成修订，并于2020年11月通过政府公报正式发布。更多详细信息可访问：https://www.mpi.govt.nz/forestry/national-environmental-standards-plantation-forestry/fish-spawning-indicator