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 simultaneously, the same bees choose the "morning" pattern in the morning and the "afternoon" pattern in the afternoon. The neotropical ant "Ectatomma ruidum" is also capable of time-place learning. They can learn to visit a feeding site in the morning, another one at midday, and a third one in the afternoon. They follow this spatio-temporal pattern even when food is withheld on test days. They then stay at the feeder for the approximate duration that food was normally available before moving on, at the right time, to the next feeder. This shows that the ants do not rely on direct