Kepadatan, Pola Distribusi dan Pola Pertumbuhan Udang Putih (Penaeus Merguiensis De Man) di Perairan Estuari Suaka Margasatwa Karang Gading Kabupaten Deli Serdang

Abstract

Research on the density, distribution pattern and growth pattern of white shrimp (Penaeus merguiensis de Man) in the Estuary Waters of the Karang Gading Wildlife Reserve, Deli Serdang Regency was carried out from June to August 2021. White shrimp sampling was carried out for three days at three stations at the same time for 2 months of observation. The sampling point was determined using the purposive sampling method. Samples were taken with a mini purse seine and the water physicochemical factors were analyzed at the Agricultural Laboratory of the University of North Sumatra. The results showed that the density of white shrimp was 4.50 ind/m2-7.33 ind/m2 with the highest density value found at station I of 7.33 ind/m2 and the lowest was 4.50 ind/m2, the distribution pattern of white shrimp with the range of 3.06-3.18 and including grouping criteria, the growth pattern of white shrimp was allometric (-) with b = 2.201 at station 1; at station 2 of 2,686, and 2,722 at station 3. The value of the substrate fraction at station I consists of 24.5% sand, 40% dust, 35.5% clay, dusty clay substrate type), station II consists of 41.5 sand %, 44% silt, 14.5 clay, clay substrate type, station III consists of 43% sand, 28% silt, 29% clay, sandy loam substrate type. Density relationship with water chemistry was negatively correlated with temperature, brightness, depth, current velocity, dissolved oxygen, BOD5, DO, and phosphate, and positive unidirectional correlation with pH, salinity, and nitrate.