Responses of Herbivorous Fishes on Coral Reef Cover in Outer Island Indonesia (Study Case: Natuna Island)Risandi Dwirama Putra, Ani Suryanti, Dedi Kurniawan, Arif Pratomo, Henky Irawan, Tengku Said Raja'I, Rika Kurniawan, Ginanjar Pratama and JumsurizalE3S Web Conf., 47 (2018) 04009DOI: https://doi.org/10.1051/e3sconf/20184704009