Kepadatan, Distribusi dan Pola Pertumbuhan Udang Putih (Penaeus merguiensis de Man) di Estuari Karang Gading, Kabupaten Deli Serdang, Sumatera Utara

Abstract

Karang Gading Estuary located on the east coast of North Sumatra with an area of ± 6,245 hectares, is one of the important areas for fishermen, especially to caught the white shrimp species (Penaeus merguiensis). White shrimp belong to the group of penaeid shrimp species which has its habitat distributed in estuary waters in the middle of the sea during two phases of the its life cycle, the estuary phase and the marine phase. As a nursery ground, the Karang Gading estuary plays an important role in the growth of white shrimp because these estuary waters are located in the mangrove ecosystem area. This research aims to analyze the density, the distribution and the growth pattern of white shrimp in the Karang Gading estuary, Deli Serdang Regency, North Sumatra. Determination of the sampling location points was carried out deliberately by determining 3 stations based on different activities so that they represent the research area. The results of the research aree obtained from 3 stations, the highest density value is found at station 2 by 2,667 ind/m² and the lowest is at station 3 which is 1,467 ind/m². The distribution pattern of white shrimp is entirely grouped, ranging from 3.06 to 3.20. The growth pattern of white shrimp at stations 1 and 3 is positive allometric, while at station 2 is negative allometric. The relationship between aquatic physico-chemical factors and white shrimp density shows that DO and BOD are positively correlated, while pH, temperature, salinity, light penetration, and substrate organic content are negatively correlated with white shrimp density.