Brachyuran crab distribution in Tikus Island, Pari Island Group, Seribu Islands

Abstract

Anggraeni P, Elfidasari D, Pratiwi R. 2015. Brachyuran crab distribution in Tikus Island, Pari Island Group, Seribu Island.Pros Sem Nas Masy Biodiv Indon 1 (2): 213-221. Brachyuran crab is one of keystone species that plays important role in nature. There are ± 150.000 unidentified Crustacean, including Brachyuran crabs. This study was conducted to analyze Brachyuran crab distribution in Tikus Island, Pari Island Group, Seribu Islands with square transect method. Square transects were set on the west, north, east and south side of the island. The results show 34 identified species which belong to 11 families, namely Portunidae, Majidae, Galenidae, Dromiidae, Calappidae, Ocypodidae, Grapsidae, Porcellanidae, Macrophthalmidae, Xanthidae and Pilumnidae. All crabs which were found were distributed in a variety of habitats differing in substrate types, indicating species ability to adapt to the environment. The crab distribution depends on the substrate presence and aquatic ecosystems that support the food availability for the crabs.