The present volume of Recent Advances in Fish Ecology, Limnology and Eco-conservation is the seventh in the series and includes fifteen original research papers on the subject.  The first volume of the series was brought out in 1988 to felicitate Professor S.M. Das D.Sc., F.Z.S. (London) F.N.A.Sc., F.A.Z., F.Z.S.I., F.N.E.S.A. (Formerly Professor & Head, Post-Graduate Department of Zoology and Dean, Faculty of Science, Jammu & Kashmir University) Scientist Emeritus,Lucknow on the completion of his fifty years of teaching and pioneering researches at the Universities of Lucknow, Kashmir and Kumaun.  The second volume appeared in 1992, the third in 1994, the fourth in 1996, the fifth in 2003 and the sixth in 2005.  Research in the vast fields of the fish ecology, limnology and eco-conservation has shown rapid development during the last two decades.  An attempt is being made in these volumes to highlight some important contributions in these areas of study.  The Editor and the Publishers accept no responsibility for the views and opinions expressed by the authors in their papers.