Deteksi Substrat Dasar Perairan dan Integrasi Ikan Demersal di Perairan Delta Payung, Sumatera Selatan

Abstract

Delta Payung merupakan delta yang berada di muara sungai Musi Sumatera Selatan. Delta sendiri terbentuk akibat adanya endapan di muara sungai. Penelitan ini bertujuan untuk memperoleh data volume backscattering strength (SV) ikan demersal dan substrat dasar melalui data nilai hambur balik yang diperoleh dengan metode akustik split beam. Survei pada penelitian ini berbentuk linear yang mengelilingi pesisir delta. Didapati hasil (Sv ) ̅ substrat sebesar-17,41 dB dengan nilai SV minimum dan maksimum -20,23 dB dan -14,8 dB. Nilai (Sv) ̅ ikan demersal adalah -53,02 dB dengan nilai minimum -58,41 dB dan nilai maksimum -55,19 dB. Sebaran waktu ikan demersal dibagi menjadi interval waktu petang dan waktu malam. Deteksi ikan tertinggi berada di Interval waktu malam. Sebaran spasial ikan demersal paling tinggi berada dibagian utara delta. Hal ini karena adanya mangrove yang menjadi habitat benthos.

The Payung Delta is a delta located at the mouth of the Musi River, South Sumatra. The delta itself is formed due to sediment at the mouth of the river. This research aims to obtain backscattering strength (SV) volume data for demersal fish and bottom substrate through backscatter value data obtained using the split beam acoustic method. The survey in this research is linear in shape surrounding the coast of the Payung Delta. It was found that the (Sv ) ̅ substrate was -17.41 dB with minimum and maximum SV values of -20.23 dB and -14.8 dB. The (Sv ) ̅ value of demersal fish in this study was -53.02 dB with a minimum value of -58.41 dB and a maximum value of -55.19 dB. The time distribution of demersal fish is divided into evening and night time intervals. The highest fish detections were in the night time interval. The spatial distribution of demersal fish is highest in the northern part of the delta. This is because there are mangroves which are benthos habitat.