Ou River (Zhejiang) two alien species (Mozambique tilapia and largemouth bass); however, 34 species recorded in 1972 were absent in 2010, and overall fish density was lower. Goby "Pseudorhinogobius aporus" is endemic to the Ou River system: it is only known from a brook in the upper Ou River system. Ou River (Zhejiang) The Ou River () or Oujiang is the second-largest river in the Zhejiang province of eastern China. The river flows before finally reaching the city of Wenzhou and emptying into the East China Sea, into which it discharges of water annually. Shen Jiang (), Jiang Yongjia (), and Wenjiang ()
Time-Place learning was delivered, such that fish could quickly sample all corners sequentially without having to learn which exact corner gave food. In birds, time-place learning has been confirmed in garden warblers, starlings, weavers, and pigeons. Garden warblers could learn to visit four rooms inside a large aviary, one during each quarter of a day. It took them only 11 days to learn, with 70% accuracy, to visit the correct room at the correct daily time to get food. The spatio-temporal pattern of visits was then maintained even when food was made available in all rooms at all times. As with circadian