Natural History
Lake Biwa is of tectonic origin and is one of the world's twenty oldest lakes, dating to almost 4 million years ago. This long uninterrupted age has allowed for a notably diverse ecosystem to evolve in the lake. Naturalists have documented about 1100 species in the lake, including 58 endemic species. Among these endemics are four fish species: Gnathopogon caerulescens (a cyprinid), Opsariichthys uncirostris (a cyprinid), Gymnogobius isaza (a goby), and Silurus biwaensis (a large silurid catfish). Lake Biwa is also an important place for water birds. About 5,000 water birds visit Lake Biwa every year.
Recently the biodiversity of the lake has suffered greatly due to the invasion of foreign fish, the black bass and the bluegill. Bluegill were presented to the Emperor and later freed in the lake as a food source for other fish. Black bass were introduced as a sport fish. In July 2009 a largemouth bass weighing 22 pounds, 4 ounces was caught in the lake by Manabu Kurita. It has been officially certified by the International Game Fish Association (IGFA) to tie the largemouth bass world record held solely by George Perry for 77 years.
Read more about this topic: Lake Biwa
Famous quotes containing the words natural and/or history:
“It would seem that man was born a slave, and that slavery is his natural condition. At the same time nothing on earth can stop man from feeling himself born for liberty. Never, whatever may happen, can he accept servitude; for he is a thinking creature.”
—Simone Weil (1909–1943)
“To care for the quarrels of the past, to identify oneself passionately with a cause that became, politically speaking, a losing cause with the birth of the modern world, is to experience a kind of straining against reality, a rebellious nonconformity that, again, is rare in America, where children are instructed in the virtues of the system they live under, as though history had achieved a happy ending in American civics.”
—Mary McCarthy (1912–1989)