Printed from: https://www.conservationhandbooks.com/waterways-wetlands/management-for-conservation-and-amenity/fish/
Fish are a good indicator of the water quality and general health of rivers and other watercourses. Fish in ponds and lakes need careful management if populations are going to remain in balance, and not cause deterioration of the ecosystem. Small wildlife or educational ponds should not be stocked with fish, and any stocking of...