Fish Biodiversity and Water Quality of Tropical Forest Streams Adjacent to the Western Boundary of Kinabalu Park, Sabah

Modification and degradation of habitats outside the boundaries a national parkmay result in park's integrity being compromised. Thus, present study aims todocument variation freshwater fish water quality tropical forest streams adjacent to western boundary Kinabalu Park, Sabah. Concurrently, samplesand environmental parameters were collected at six stations covering total streamline length 10 km. The three most abundant species Tor tambra (34.4%), Barbodes sealei (19.5%), Lobocheilos ovalis (12.4%). exhibited negative allometric growth pattern (coefficient < 3) was poor fair condition (0.8< Fulton’s factor 1.2). highest abundance found downstream with addition. Metrics diversity, such as Shannon's diversityindex Margalef index richness, decreased elevation increasedfrom 100 600 metres above sea level. isgood, classified Class I and/or II by Malaysia's National Water Quality Standards, except for ammoniacal nitrogen station 6, which III.Higher turbidity, orthophosphate, ammoniacal-nitrogen values nearthe Podos village. In conclusion, altitudinal gradient biodiversity observed near Park. Regular monitoring ofthe river is necessary, indicated potential domestic impacts onthe river.Keywords: Biodiversity, Elevation, Freshwater fish, Forest stream, Park