Keanekaragaman Jenis Ikan di Sungai Lau Belawan Kecamatan Pancur Batu Provinsi Sumatera Utara

Abstract

The Belawan Watershed (DAS) has an area of 8,694.82 Ha located in the upstream part. In the central part of the Belawan River Basin Various anthropogenic activities include sand dredging, agricultural activities, and bathing, washing, latrines (MCK) where sand dredging activities are the most frequently carried out activities on the Central Lau River.. In an effort to determine the diversity of fish species, it can be assessed using abundance, diversity index, uniformity index and dominance index. Then to analyze the relationship between diversity and waters in the Belawan River, it is done using the XLSTAT application using Principal Component Analysis. The method used in determining research stations was purposive sampling. PHysical and chemical water parameters were also measured in the form of temperature (°C), pH, DO, depth, brightness and current speed. The results showed a structure of 12 species and 5 families with moderate diversity. The correlation results show that the diversity of fish species in the Lau Belawan River is positively correlated with pHysical parameters, namely depth, with a very strong interpretation and chemical parameters, namely DO, with a very weak interpretation. Then other parameters, namely temperature, pH, depth and brightness, have a negative correlation with the diversity of fish species with interpretation. very weak.