According to the niche variation hypothesis (NVH), populations with wider niches are phenotypically more variable than those narrow niches. Giller expanded NVH, suggesting that width, morphological variation, and genetic diversity all positively correlated. However, has been a subject of debate discussion. In present study, NVH was tested by analyzing relationships among trophic Hemiculter leuc...

The introduction of non-native fish species is known to have adverse effects on aquatic ecosystems, but their effect plateau lakes not well studied. In this study, we examined the Japanese smelt (Hypomesus nipponensis) invasion assemblage in Lake Erhai, a subtropical lake southwestern China. Through cluster analysis and non-metric multidimensional scaling (NMDS), found significant shift: popula...

How fish communities change with eutrophication in temperate lakes is well documented, while only a few studies are available from subtropical lakes. We investigate the community structure 36 located Yangtze River basin, covering wide nutrient gradient. found that species richness and total catch per unit effort (CPUE) increased significantly chlorophyll (Chla). Among different feeding types, p...

Hemiculter leucisclus , as a widely distributed freshwater fish in China, provides an interesting model to explore the impact of drainage evolution and geologic history Pleistocene on diversification patterns. We collected mitochondrial cytochrome b (cytb) gene recombination activating 2 (RAG2) from 1,070 individuals 59 sampling locations. Phylogenetic population genetic approaches were used de...

A survey was performed to investigate the infection status of fishborne trematode (FBT) metacercariae in freshwater fish from Guangxi Zhuang Autonomous Region, China. A total of 307 freshwater fish of 31 species were collected from 5 administrative regions of Guangxi Zhuang Autonomous Region. They were examined by artificial digestion method from July 2003 to August 2004. No metacercariae were ...

The Sun Moon lake in Central Taiwan is a known endemic area for clonorchiasis. Of the 45 fresh water fish, Hemiculter leucisculus, from the lake that were examined by artificial gastric juice digestion in October 1995, all were found to harbor metacercariae in their muscle. The number of metacercariae isolated from each fish ranged from 2 to 2,185, with an average of 254. A total of 11,443 meta...

As aquaculture food production is expected to increase, introduced species play an important role in meeting the rising demand for aquatic products and contributing great societal benefits. Species introduction forces sympatric coexist within same ecosystem by niche segregation. Japanese smelt Hypomesus nipponensis sharpbelly Hemiculter leucisculus are ecologically similar were Lake Bosten, lar...