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The composition of fish fauna in the Red River basin was analyzed based on 288 fish species belonging to 138 genera, 53 families (subfamilies), and 14 orders, using the Traditional Fish Fauna Analysis (TFFA) and the Value of Fish Fauna Presence (VFFP) methods. The TFFA and VFFP methods allow for a ranking of the taxa according to commonality and uniqueness of the taxa to the river basin; however, both methods provide different, complimentary results. Based on the results from the TFFA method, 15 families (subfamilies), including 85 genera and 219 species, were identified as the main fish taxa in the Red River basin. Based on the results of the VFFP method, 17 families (subfamilies), including 89 species and 52 genera, were highlighted as representative families (subfamilies) and genera in the Red River basin. Overall, Cypriniformes was the most abundant order, followed by Siluriformes and Gobiiformes. Although the Red River basin is geographically situated in Southeast Asia, it had obvious characteristics of East Asian fish fauna rather than Southeast Asian fish fauna. Therefore, the Red River fish fauna can be considered the boundary between the fish fauna of Southeast Asia and East Asia. This paper further detailed the indexes and calculations of the TFFA and VFFP methods. The authors proposed using the results of the TFFA and VFFP methods as indicators for planning fish preserves as well as discussed the specific methods related to using these indicators to plan and establish fish preserves. |
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