erek2 30Teknik penentuan subjek menggunakan two stage cluster sampling. Dari 30 cluster terpilih, ditentukan masing30=23–99–58–49. Ikan Nus, 96=98–14–63–64. Ikan Paus, 52=66–03–99–85. Ikan Sampan, 86=84–33–37–83. Ikan Suro, 43=40–71–41