Algicidal Bacteria from fish culture areas in Bolinao, Pangasinan, Northern Philippines
2013; Linguagem: Inglês
ISSN
0119-1144
AutoresKamille Joshua V. Manset, Rhodora V. Azanza, Deo Florence L. Onda,
Tópico(s)Algal biology and biofuel production
ResumoThe 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 from 14 selected stations in Bolinao during the Northeast (NE) Monsoon, Tradewind (TW) and Southwest (SW) Monsoon in 2010-2011. One hundred ten (110) bacteria were screened, thirty (30) showed algicidal activity against Alexandrium sp. and 13 genetically identified bacteria caused loss of motility to AMBRVA03171 after the first hour of interaction. These were Vibrio sp., V. parahaemolyticus, Pseudomonas sp., Pseudomonas aeruginosa, Pseudomonas viridis, Pseudoalteromonas sp., Ruegeria lacuscaerulensis, Halobacillus sp., and Algoriphagus sp., and two isolates of V. harveyi and uncultured bacterium. These bacteria were tested against five other HAB-causing dinoflagellates isolated from the Philippines, namely Pyrodinium bahamense strain PbcMZRVA042595; Alexandrium affine strain AAFHBRVA102905; Amphidium carterae strain ACARABRVABML; Gymnodinium catenatum strain GcMBRVA011810 and Ostreopsis ovata strain OOVBOLMBRVA111510. After 24 h of incubation, the five dinoflagellate species showed more lysis but those in the control wells remained motile and unaffected. Isolated algicidal bacteria can be used to improve management of these HABs and can also be utilized for applied studies on their active substances. Key words: algicidal bacteria, Alexandrium, Bolinao
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