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Title: Fish species, relative abundances and environmental associations in small rivers of the Mae Klong River basin in Thailand
Authors: Sampan Tongnunui
Frederick W.H. Beamish
Chunte Kongchaiya
Mahidol University
Burapha University
Keywords: Agricultural and Biological Sciences
Issue Date: 1-Sep-2016
Citation: Agriculture and Natural Resources. Vol.50, No.5 (2016), 408-415
Abstract: © 2016 Kasetsart University Fish species were collected by electrofishing from 96 sites, representing 79 species, in lightly exploited rivers in western Thailand. Significant chemical and physical environmental factors associated with species numbers and total fish abundance were identified using multiple linear regression. Total abundance correlated negatively with water depth and temperature (r = 0.4, p < 0.05), whereas species numbers correlated positively with river discharge and negatively with elevation (r = 0.6, p < 0.05). Chemical and physical factors that significantly influenced species distribution were determined using partial least squares regression analysis, (p < 0.05; axes 1, r = 0.8; axes 2, r = 0.85), and included elevation, river discharge, width and depth as well as ambient oxygen, alkalinity and pH. Fish were placed into four categories according to their habitat occupancy and abundance and termed; uncommon (54 species), common (16 species), even (8 species) and uneven (1 species), respectively.
ISSN: 2452316X
Appears in Collections:Scopus 2016-2017

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