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Abstract
Penelitian ini bertujuan untuk mengetahui keanekaragamaan dan kelimpahan jenis keong air tawar di Sungai Pomua Palandu dan Sungai Toinasa, yang merupakan inlet dari Danau Poso, Sulawesi Tengah. Penelitian dilakukan dari bulan Januari hingga Februari 2019. Sampel dikoleksi pada 6 stasiun menggunakan metode transek. Hasil identifikasi didapatkan 3 spesies dari dua famili yaitu Pachychilidae dan Thiaridae. Famili Pachychilidae terdiri dari 2 jenis yaitu Tylomelania toradjarum dan T. scalariopsis sedangkan famili Thiaridae terdiri dari 1 jenis yaitu Terebia granifera. Keanekaragaman keong air tawar yang diperoleh di Sungai Pomua Palandu tergolong rendah sedangkan di Sungai Toinasa tergolong sedang. Kelimpahan relatif yang tertinggi di Sungai Pomua Palandu dijumpai pada spesies Terebia granifera di hilir sungai dan di Sungai Toinasa pada spesies Tylomelania toradjarum yang juga di hilir sungai.
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