Abstract: In order to understand the effects of reservoir construction on fish assemblages, a fishery resource investigation was conducted on the fish assemblages in the Xihe reservoir of Hanjiang River in autumn 2011 and spring 2012. A total of 35 fish species were collected, belonging to 6 families and 4 orders. Most of the fishes belonged to family Cyorinidae (22 species) and Bagridae (7 species). As compared with those collected in 1980-1982, the fish assemblages collected in 2011-2012 changed greatly. The species producing semi-pelagic eggs and preferring to live in riffle declined, while those producing viscid eggs increased. The changes of the other ecological guilds were related to the spawning types and the preferring to live in riffle. On the whole, the ecological guilds of the fishes in the Xihe reservoir showed convergence in spawning, inhabitation, and somatotype. The changes of hydrological conditions resulted from dam construction could be the main causes of the changes of the fish assemblages in the Xihe reservoir. Some advices were given to protect the fish diversity and abundance in the Xihe reservoir of Hanjiang River.

Key words: grape, greenhouse cultivation, high photosynthetic efficiency, canopy type, GC-MS.