Spatial and seasonal dynamics of fish assemblage along river Soan,Pakistan and its relationship with environmental conditions |
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| Institution: | 1. Environmental Biology Laboratory, Department of Plant Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan;2. Department of Meteorology, COMSATS Institute of Information Technology, Islamabad, Pakistan;3. Environmental Biology and Ecotoxicology Laboratory, Department of Environmental Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan;1. CSIRO Land and Water, EcoSciences Precinct, Dutton Park, QLD 4102, Australia;2. School of Natural Resources & the Environment, The University of Arizona, Tucson, AZ 85721, USA;3. Udall Center for Studies of Public Policy, The University of Arizona, Tucson, AZ 85721, USA;4. U.S. Geological Survey, Geosciences and Environmental Change Science Center, Denver, CO 80225, USA;5. Institute of Silviculture, University of Natural Resources and Life Sciences, Vienna, Austria;6. United States Geological Survey, Upper Midwest Environmental Sciences Center, 2630 Fanta Reed Road, La Crosse, WI 54603, USA;7. Department of Integrative Biology, University of Guelph, Ontario N1G 2W1, Canada;1. Environmental Biology and Ecotoxicology Laboratory, Department of Environmental Sciences, Quaid-I-Azam University, Islamabad 45320, Pakistan;2. Department of Biosciences, COMSATS Institute of Information Technology, Islamabad 45550, Pakistan;3. State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;1. Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus, 61100, Pakistan;2. Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Faisalabad 38040, Pakistan;3. School of Civil Engineering and Surveying, University of Southern Queensland, Toowoomba 4350, Queensland, Australia;4. School of Chemical & Materials Engineering, National University of Sciences & Technology, 44000H-12 Islamabad, Pakistan;5. University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water, and Waste-Management, Laboratory of Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285 Wuppertal, Germany;6. King Abdulaziz University, Faculty of Meteorology, Environment, and Arid Land Agriculture, Department of Arid Land Agriculture, 21589 Jeddah, Saudi Arabia;7. University of Kafrelsheikh, Faculty of Agriculture, Department of Soil and Water Sciences, 33516 Kafr El-Sheikh, Egypt;8. Biochar Engineering Technology Research Center of Guangdong Province, School of Environmental and Chemical Engineering, Foshan University, Foshan 528000, China;9. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China;10. Department of Environment, Energy and Geoinformatics, Sejong University, Seoul 05006, Republic of Korea;1. Memorial University of Newfoundland, Faculty of Humanities and Social Sciences, Department of Geography, St John''s, NL, Canada;2. Feaver''s Lane Enterprises Inc., 125 Bond Street, St. John''s, NL, Canada |
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| Abstract: | This study aims to discuss the seasonal and spatial dynamics of fish assemblage of River Soan in relation with environmental changes. Survey was conducted during pre monsoon and post monsoon seasons in 2008. Physico chemical and biological samplings were carried out at 26 sites which were selected along the whole stretch of the river. High concentration of total phosphorous and conductivity, low pH and dissolved oxygen were measured at urban part of midstream zone whereas high concentration of total nitrogen was measured at downstream zone. A total of 22 species were collected during the survey among which Barilius pakistanicus, Puntius ticto, Crossocheilus diplochilus and Labeo dero were distributed throughout the river stretch. Maximum fish diversity was recorded at suburban part of midstream while its urban part was appeared to be the most species poor part of the Soan River. Herbivore individuals constituted the dominant trophic group of fish assemblage. Significant seasonal and spatial changes in fish assemblage were determined at river downstream. Upstream- downstream differences in fish assemblage were more pronounced during pre monsoon and seem to be related to thermal gradient and hydrological changes. Seasonal variations in fish assemblage were significant only at downstream zone and were influenced by velocity, floodplains and migration patterns in fish assemblage. Understanding of spatial and seasonal trends in fish assemblage in relation with their environment is of great importance for the management and conservation of fish assemblage. Findings of this study will be helpful in future attempts to restore and conserve the aquatic assemblages of Himalayan streams. |
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| Keywords: | River Soan Fish assemblage Spatio-seasonal variations Himalayan streams |
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