Abstract
Freshwater fish is one of the biodiversity that build river ecosystem structure. Many human activities are carried out in the river as well as in the surrounding areas, such as removal of household waste, excessive fish exploitation and land use activities. This might changes river characteristics and lead to population and biodiversity decline.This research aim to 1) analyzethe diversity and species composition of fishin Luk Ulo River of Kebumen Regency,and 2) analyze the interaction among environmental factors with fish abundance in Luk Ulo River of Kebumen Regency. This research used survey method with cluster random sampling. The river was divided into three different region; upper-stream, middle-stream, and down-stream. Fish collected from 9 stations, i.e. 3 stations in the upper-stream, 3 stations in the middle-stream, and 3 stations in the down-stream. Morphology data were analyzed descriptively in order to make species description. The influences of environmental factor to species abundance were analyzed using Principal Component Analysis (PCA).The results showed that the number of fish obtained in this study were 72 individuals classified into 7 families and 13 species. The diversity and abundance of fish are influenced by physical and chemical factors ie temperature, TSS, pH, BOD5, COD, turbidity, DO, conductivity, salinity, current and substrate. BOD5 concentration was correlated positively with fish abundance with a correlation value of 0.540. In contrast, the effect of temperature and pH has a negative correlation to fish abundance with correlation values of -0.731 and -0.024. Dissolved oxygen (DO) and conductivity no effect on fish abundance.
Highlights
Ikan merupakan salah satu keanekaragaman hayati yang menyusun ekosistem sungai
The influences of environmental factor to species abundance were analyzed using Principal Component Analysis (PCA).The results showed that the number of fish obtained in this study were 72 individuals classified into 7 families and 13 species
Studi Parameter Fisika Kimia Air pada Areal Budidaya Ikan di Danau Tondano, Desa Paleloan, Kabupaten Minahasa
Summary
Pengambilan sampel dilakukan di Sungai Sungai Luk Ulo terletak di Kabupaten Kebumen Propinsi Jawa Tengah. Sampel diambil pada daerah hulu, tengah dan hilir dari sungai Luk Ulo. Hulu sungai berada di Desa Seboro Kecamatan Sadang, daerah tengah berada di Desa Kutosari Kecamatan Kebumen sedangkan daerah hilir berada di Desa Pandanlor Kecamatan Klirong. Identifikasi dan Determinasi dilakukan di Laboratorium Program Studi Biologi FMIPA, UMNU Kebumen. Penelitian ini menggunakan metode survei dengan teknik pengambilan sampel secara Cluster Random Sampling.Ikan dikoleksi dari 9 stasiun yaitu daerah hulu sebanyak 3 stasiun, daerah tengah 3 stasiun dan daerah hilir sebanyak 3 stasiun. Penangkapan ikan dilakukan menggunakan jaring dengan ukuran mata jaring. Pengukuran data parameter kimia dan fisik dilakukan secara langsung di lokasi penelitian dan di laboratorium. Pengaruh faktor lingkungan terhadap kelimpahan spesies ikan Familia Cyprinidae dianalisis menggunakan PCA (Principal Component Analysis)
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