抄録
The fish of Lake Biwa were a product of nature, arising and evolving through a very long period before coming under the influence of various human activities. A stable interrelationship between human beings and fish built up over several thousand years, but the relationship has been breaking up recently. The condition of fish fauna in Lake Biwa has changed greatly due to the great and rapid expansion of human activities. The littoral zone of Lake Biwa is now overwhelmed by introduced fish, and the native fish have decreased markedly in number there. Some native fish in Lake Biwa are facing the crisis of extinction. People are ceasing to take interest in their everyday environment and in the local fish. However, we can still see native fish in the canals that feed and drain the paddy fields surrounding Lake Biwa. The conservation of Lake Biwa is not a problem only of water quality, but also of conserving the living beings that inhabit those waters. For the conservation of Lake Biwa, it is thus necessary for many people to redevelop an interest in their local environment and such formerly familiar organisms as the native fish.
https://ror.org/03esr8826 
