Paper Type |
Contributed Paper |
Title |
Fish Distribution in a River Basin in the Lower Northern of Thailand and a Strategy for Conservation Following River Damming |
Author |
Tuantong Jutagate*[a], Joompol Sa-nguansin [b], Gridsada Deein [c] and Suriya Udduang [d] |
Email |
tjuta@agri.ubu.ac.th |
Abstract: D istribution patterns of 157 fi sh species, including 7 IUCN- and 2 exotic- species, in the river basin of Phisanulok Province, Central of Thailand were analyzed by an adaptive learning algorithm called a “self organizing map” (SOM) using a presence/absence data of the fi sh species in 26 sampling sites, conducted between 2003 to 2008. Sampling sites were classifi ed according to the hydrographic system and covered the area of the recently completed, Khwae Noi Reservoir. The results from SOM were partitioned the sampling sites into three main clusters with two sub-clusters, due to the similarity of fi sh compositions. The lowest species richness was observed in the high altitude hill stream area (i.e. cluster I) and gradually increased along the longitudinal river gradient (i.e. from cluster II to IIIb). The predicted occurrence probability (OP) showed the potential of individual species to establish in each area. Each species had its own range of distribution and could be classifi ed into 8 groups according to their visualization gray scale on SOMs. Distribution pattern, of each group, was related to the biological functions and ecological trait of the species. Implication for fi sh conservation, especially due to damming the Khwae Noi Reservoir, by declar ation of reserves is proposed.
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Start & End Page |
485 - 502 |
Received Date |
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Revised Date |
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Accepted Date |
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Full Text |
Download |
Keyword |
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Volume |
Vol.38 No.3 (JULY 2011) |
DOI |
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Citation |
Jutagate T., Sa-nguansin J., Deein G. and Udduang S., Fish Distribution in a River Basin in the Lower Northern of Thailand and a Strategy for Conservation Following River Damming, Chiang Mai J. Sci., 2011; 38(3): 485-502. |
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