Abstract : Diversity and Abundance of Crustacean (Decapoda, Brachyura) at Kamora Mangrove Forest in Papua

Diversity and Abundance of Crustacean (Decapoda, Brachyura) at Kamora Mangrove Forest in Papua

By Agung Faiz Darmawan¹, Deky Lala¹, and Dwi Listyo Rahayu2
1) PT. Freeport Indonesia. Environmental Department. Timika Environmental Laboratory Timika 98663 Papua, Indonesia. Telp. (0901) 42 5402 Fax (0901) 42 5403. agung_darmawan@fmi.com
2) Research Center for Oceanography Indonesian Institute of Sciences

Study of mangrove crustacean in Kamora forest, Mimika district was carried out in April and May 2007. The aim of the study is to observe the crustacean community in mangrove area. Samples were collected from three station (Kamora1, Kamora2, and Kamora3) using line transect plot method placed 0 m (near river bank), 250 m from river bank and 500 m from river bank. The results showed that family Sesarmidae is dominated the area by the number of species (17 of 37 species) and individuals (1264 of 1758 individuals). Within the family Sesarmidae, Perisesarma foresti is the most abundant species (25 individuals/10m2), followed by Sarmatium germaini (13 individuals/10m2).

The second dominant family is Ocypodidae, represented by 5 species and 196 individuals. Within the family Ocypodidae, Uca triangularis and Uca coarctata are abundant (4 and 3 individuals/10 m2 respectively). Among the three transect lines, Kamora 2 has the lowest number of species and individual. The highest number of species was collected at Kamora 3 but the highest number of individuals was collected at Kamora 1. In Kamora 1, 2 and 3, the site near river bank have the highest number of species. This phenomenon was caused this area have a shorter period of drought.

Key words: diversity, abundance, mangrove crustacean, kamora forest