Pengaruh Ekstrak Daun Mangrove (Avicennia marina) terhadap Ketahanan Tubuh Udang Vaname (Litopenaeus vannamei ) Sitti Asna Samuria, Indriyani Nur, Muhaimin Hamzah JSIPi (Jurnal Sains dan Inovasi Perikanan) (Journal of Fishery Science and Innovation) Vol. 2 No. 2 2018 DOI 10.33772/jsipi.v2i2.7573