Malays. Appl. Biol. (2008) 37(1): 21–29
COMPARATIVE ANALYSIS OF LENGTH-WEIGHT RELATIONSHIP OF RASBORA SUMATRANA IN RELATION TO THE PHYSICOCHEMICAL CHARACTERISTICS IN DIFFERENT GEOGRAPHICAL AREAS IN PENINSULAR MALAYSIA
SHUKOR, M.N.*, SAMAT, A., AHMAD, A.K. and RUZIATON, J.
School of Environment and Natural Resources, Faculty of Sciences and technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor *E-mail:
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ABSTRACT
Length-weight relationship of Rasbora sumatrana from four geographical areas in Peninsular Malaysia were studied. The objective of this study was to investigate the length-weight relationship and the influence of selected physical and chemical water characteristics to the growth performance, abundance and diversity of R. sumatrana from four different geographical location in Peninsular Malaysia. In this study, from the nine physical and chemical parameters, it was found that fish growth performance was only significantly affected by pH and stream flow of stream water. Other physical parameters do not show any significant differences among studied locations. Result indicated that R. sumatrana has b-values within the suggested range (2.5-3.5). Slow stream flow in undisturbed areas has been found to provide suitable environment for growth of this species. Nitrate concentrations also known to affect growth performance, but the result of this study indicated that R. sumatrana grew well in high nitrate concentration level within the study areas.
ABSTRAK
Hubungan panjang-berat Rasbora sumatrana yang di kumpul dari empat kawasan yang berbeza ciri geografi di Semenanjung Malasia telah di kaji dan di analisa. Objekif kajian ini adalah untuk mencari hubungan diantara panjang, berat dan pertalian panjang-berat terhadap ciri-ciri kimia dan fizikal bagi menentukan faktor yang mempengaruhi tumbesaran, kelimpahan dan kepelbagaian ikan di Semenanjung Malaysia. Dalam kajian ini, ujian statistik menunjukkan bahawa daripada sembilan parameter fizikal dan kimia yang dikaji, pertumbuhan populasi ikan hanya di pengaruhi oleh pH dan arus sungai. Parameter fizikal yang lain tidak menunjukkan perbezaan yang ketara di antara kawasan kajian. Data juga menunjukkan bahawa nilai-b R. sumatrana berada di dalam julat yang dicadangkan. Arus sungai yang perlahan di kawasan tidak terganggu dicadangkan menyediakan persekitaran yang sesuai untuk pertumbuhan spesies ini. Kepekatan nitrat juga diketahui memberi kesan terhadap pertumbuhan populasi ikan, tetapi keputusan kajian ini menunjukkan bahawa R. sumatrana boleh membesar dengan baik dalam tahap kepekatan nitrat yang tinggi dikalangan kawasan yang dikaji.
Key words: Length-weight relationship, Rasbora sumatrana, Peninsular Malaysia
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