Relationship of Mangrove Density with Fish Diversity in the Waters of Mangrove Area in Lubuk Kertang Village, Langkat District of North Sumatera

Abstract

Mangrove ecosystem is one among of the several ecosystems that is found in coastal areas. Mangrove in Lubuk Kertang Village managed together by local peoples to fufill the needs of their community. The present study was aimed to know the mangrove density, fish diversity, and the correlation of mangrove density to fish diversity. Research was conducted by using survey method with three times sampling for two months. Mangrove species that were reported at the research site consists of 10 species of the Rhizophora apiculata, Rhizophora stylosa, Avicennia alba, Avicennia lanata, Avicennia marina, Soneratia alba, Bruguiera sexangula, Acanthus ilicifolius, Excoecaria agallocha, dan Scyphiphora hydrophyllaceae. The kind of fish species that were found in the research site consists of 16 species that belonged to the 5 orders, 15 families, 15 genera that was Gymnothorax tile, Epinephelus fuscoguttatus, Plotosus canius, Johnius trachycephalus, Valamugil engeli, Scatophagus argus, Carangoides praeustus, Gerres filomentosus, Lutjanus fulviflamma, Leiognathus equulus, Lutjanus johnii, Hemaloptera ocellata, Butis amboinensis, Batrachomoeus trispinosus, Bodianus izuensis, and Pomadasys argenteus. The fish species diversity index was 1.972 (moderatly), and correlation coefficient of mangrove density to fish diversity was 0.876 (very strong).