Species Composition & Ecology Index Of The Family Gobiidae At The Mangrove Belawan Of Sicanang Island

Abstract

The Gobiidae family is the biodiversity resource of fish that occupies the habitat of mangrove forest ecosystems. Have an important ecological role, as the level of traffic in the food chain and can be used as environmental bioindicator. A study related to the diversity of Gobiidae has never been done in the mangrove ecosystem Belawan Sicanang. This research is an exploratory, a discrete purposive sampling method for the determination of 3 observation stations. Fish sampling using fishing gear, fishing nets, fishing rod, and fishy fish. Based on the results of the study there were 67 individuals caught fish, namely: Stigmatogobius Sadan undi (18 individuals), Buti samboinensis (12 individuals), Butis butis (12 individuals), Acentrogobius viridi punctatus (10 individuals), Ophio caraporo cephala (7 individuals), Brachy gobiusdoriae (3 individuals), Gobioidesbrous sonnetii (3 individuals), dan Mugilogobius filifer (2 individual). Averagevalue of ecological index for H' (1.76) with medium category; J' (1.10), high category; and C (1.11) category there is a type that dominates.

 Keyword: Composition species, Ecological Index, Familly Gobiidae, Mangrove at  BelawanSicanang