The Type and Distribution of Violin Crab (Uca) at Mangrove Forest of Kahyapu, Enggano Island and The Gulf of Muaro, Labu Nawi, Bengkulu City

Abstract

Violin Crab (Uca) is type of crab living in mangrove habitat as a detrivore. In Bengkulu, the mangrove forest zone locates in many areas, including Kahyapu, Enggano Island and Gulf of Muaro Labu Nawi, Pulau Baai, Bengkulu City. The objective of this experiment was to investigate the pattern of Violin Crab distribution at mangrove forest in Kahyapu and Gulf of Muaro. The methodology used in this experiment, carried out from 2017 to 2018, was a survey done by random sampling. The samples were taken from 2 stations at 10 plots, whose size was1m x 1m each. The variable measured included the crab pattern of distribution and abiotic factor which might affect the growth of the crabs, such as water pH, temperature, and salinity Muaro Labu Nawi. However, the total Biola crab in these two habitats was 11, including Uca annulipes, Uca boninensis,Uca coarcata, Uca crassipes, Uca dussemiert, Uca forcipata, Uca perplexa, Uca rosea, Uca tetragon, Uca triangularis, and Uca vacans. The violin crab inhabitating Kahyapu showed random pattern of distribution while those in the Gulf of Muaro Labu Nawi had clustered and random distribution. Moreover, Kahyapu habitat had water temperature of 27–30 C, solution pH of 6.4–6.7, and salinity level of 26–28%. On the other hand, the Gulf of Muaro Labu Nawi had water temperature of 27–31 C, pH of 6.5–6.9, and 26–31% of salinity level.