Algicidal Bacteria from fish culture areas in Bolinao, Pangasinan, Northern Philippines

摘要: The first record of bacteria with algicidal activity against Alexandrium sp. strain AMBRVA031710, a Harmful Algal Bloom (HAB)-causing dinoflagellate was isolated from Bolinao, Pangasinan. Water samples for bacterial isolation were collected 14 selected stations in Bolinao during the Northeast (NE) Monsoon, Tradewind (TW) and Southwest (SW) Monsoon 2010-2011. One hundred ten (110) screened, thirty (30) showed 13 genetically identified caused loss motility to AMBRVA03171 after hour interaction. These Vibrio sp., V. parahaemolyticus, Pseudomonas aeruginosa, viridis, Pseudoalteromonas Ruegeria lacuscaerulensis, Halobacillus Algoriphagus two isolates harveyi uncultured bacterium. tested five other HAB-causing dinoflagellates Philippines, namely Pyrodinium bahamense PbcMZRVA042595; affine AAFHBRVA102905; Amphidium carterae ACARABRVABML; Gymnodinium catenatum GcMBRVA011810 Ostreopsis ovata OOVBOLMBRVA111510. After 24 h incubation, species more lysis but those control wells remained motile unaffected. Isolated can be used improve management these HABs also utilized applied studies on their active substances. Key words: bacteria, Alexandrium,