Sebaran Pola Pertumbuhan Ikan Red Devil (Amphilophus sp) Di Kawasan Danau Batur, Bali
Abstrak
Danau Batur merupakan salah satu danau yang terletak di Kecamatan Kintamani, Bali. Danau ini memiliki keanekaragaman hayati yang melimpah, salah satunya adalah Ikan Red Devil (Amphilophus sp) yang merupakan kompetitor ikan asli dan introduksi. Penelitian ini bertujuan untuk mengetahui sebaran pola pertumbuhan Ikan Red Devil, struktur ukuran, serta kondisi fisika dan kimia perairan. Metode yang digunakan adalah deskriptif kuantitatif dengan menggunakan dua alat tangkap yaitu jaring dan pancing. Hasil perhitungan menunjukkan bahwa sebaran pola pertumbuhan Ikan Red Devil pada kedua alat tangkap (jaring dan pancing) bersifat mengelompok (Id > 1). Nilai struktur ukuran tertinggi pada alat tangkap pancing dijumpai pada perairan Desa Trunyan, yaitu panjang total (PT): 9,3 cm, panjang standar (PS) : 7,3 cm, dan berat: 16,5 g. Pada alat tangkap jaring nilai tertinggi dijumpai pada perairan Desa Songan yaitu panjang total (PT): 13,5 cm, PS: 11,1 cm, dan Berat 48,8 g. Pola pertumbuhan Ikan Red Devil (Amphilophus sp) berdasarkan analisis panjang dan berat menunjukkan pola pertumbuhan yang sebagian allometrik positif dan sebagian lagi allometrik negatif. Hasil pengukuran parameter kualitas air di perairan Danau Batur berkisar 26,3°C – 29,1°C (suhu), 5,36-6 mg/L (DO), 7,2 -7,8 (pH), dan 87,1-147,8 cm (kecerahan).
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