Ekologi Kepiting Bakau (Scylla serrata) di Hutan Mangrove Kelurahan Belawan Sicanang Kecamatan Medan Belawan Provinsi Sumatera Utara

Abstract

The research aimed to determinemangrove ecological conditions, to determine abundance mangrove crabs, to determine the growth of mangrove crab. The research took place in May −June 2016. The method used in the determination of the location is purposive sampling and divided into 3 stations based on different activities.Analysis of mangrove vegetation derivedmangrove density, relative density, mangrove frequency, relative frequency, dominance, relative dominance, importance value index, diversity index, and evenness index. The structure of the mangrove crab population assessed the abundance of mangrove crab, carapace width relation with body weight, growth pattern, and factor condition.The quality habitat mangrove crab viewed the water quality, the substrate texture, C-organic, tides. The results showed that the mangrove forest is very tight criteriawhere mangrove density≥ 1500 ind/ha, the relative dominance ≥ 75%, the abundance of mangrove crab 16300 – 17000 ind/ha, growth pattern was negative allometric(b < 3), factor condition ranges between 0 − 1 classified into flat. The water quality and substrate were assessed included in supporting life mangrove crab, the substrate texture was sandy loam and sandy clay loam, C-organic classified< 1% was very low, the type of tides was mixed semidiurnal prevailing.