ISSN: 3048-7250 
Asutosh Tiwari
Assis. Professor
Zoology,
Pt.J.L.N. College, Banda, India
Abstract
The Ken River, one of the principal rivers of the Bundelkhand region in central India, plays a crucial role in sustaining ecological balance and supporting livelihoods. This research paper aims to quantitatively analyze the relationship between key physico-chemical water quality parameters and the diversity of fish species inhabiting the river. Water samples were collected from three strategically selected sites representing upper, middle, and lower stretches of the river. Parameters such as temperature, pH, dissolved oxygen (DO), biological oxygen demand (BOD), chemical oxygen demand (COD), total dissolved solids (TDS), nitrates, and phosphates were measured using standard protocols. Simultaneously, fish samples were collected and identified to study species richness, abundance, and distribution. The study reveals that fish diversity is positively correlated with DO and negatively influenced by increased levels of BOD and TDS. Seasonal variation also had a marked impact on both water quality and fish composition. The findings highlight the need for continuous monitoring of the Ken River to ensure the ecological sustainability of its aquatic resources. This study provides valuable insights into how physico-chemical characteristics of water influence biodiversity and serves as a foundation for future conservation and management strategies.