Dr. D. R. Khanna is the former head and professor in the Department of Zoology and Environmental Science, Gurukula Kangri University, Haridwar, Uttarakhand He has published about 120 research papers in Journals of National and International repute. He is also the author of more than 40 books and magazines and editor of several journals. He is the member of several national and international societies. He has organized, attended and presented the research experience in more than 50 National and International conferences. He is also the winner of many reputed awards and fellowships. He has about 40 years of teaching experience at undergraduate, Postgraduate and Ph D programme and 30 years of research experience and extension activities. Currently he is involved in research in the field of Limnology and aquatic sciences.