Research on fish species composition in Tam Giang - Cau Hai lagoon, Thua Thien - Hue province
Keywords:Fish species composition, Tam Giang - Cau Hai, Thua Thien - Hue
The Tam Giang - Cau Hai lagoon is the biggest one in Southeast Asia of 70 kilometers long and the total area of 248 square kilometers. It plays a very important role in the economy, culture and ecotourism in Thua Thien - Hue province and especially, it is of a great scientific value. However, it has been being threatened due to over exploiting and aquaculture. Many constructions, such as, hydroelectric Plant on Huu Trach branch and in A Luoi district, water reservoir in Ta Trach branch, Thao Long salt water prevention dyke will have affect on its ecosystem.Analyzing fish specimens collected from 2005 to 2007 in Tam Giang - Cau Hai lagoon, we revealed 177 species belonging to 129 genus of 73 families in 18 orders, of those the Perciformes are the most abundant order with 100 species (56.50%); the next is Cypriniformes with 15 species (8.47%), Anguilliformes with 12 species (6.78%), Clupeiformes with 9 species (5.08%); Pleuronectiformes order with 8 species (4.52%); each of Scorpaeniformes and Tetraodontiformes order with 5 species (2.82%); Siluriformes and Beloniformes with 4 species (2.26%); Rajiformes and Synbranchiformes with 3 species (1.69%); each of Elopiformes and Syngnathiformes with 2 species (1.13%); and the others with 1 species (0.56%). Of the total 177 fish species recorded in Tam Giang - Cau Hai lagoon, there are 21 species of the local economic value and 8 species listed in Red Data Book of Vietnam (2007) at different levels (VU - Vulnerable and EN - Endangered).