Document Detail

Eutrophic waters, algal bloom and fish kill in fish farming areas in Bolinao, Pangasinan, Philippines.
MedLine Citation:
PMID:  18456288     Owner:  NLM     Status:  MEDLINE    
The coastal waters of Bolinao, Pangasinan, Philippines experienced environmental changes over a 10-year period (1995-2005), the most significant effect of which was the major fish kill event in 2002 that coincided with the first reported Philippine bloom of a dinoflagellate Prorocentrum minimum. Days before the bloom, dissolved oxygen was < 2.0 mg/l in the waters that were stratified. These conditions may be linked to the uncontrolled proliferation of fish pens and cages to more than double the allowable limit of 544 units for Bolinao waters. Mariculture activities release organic matter from unconsumed feed and fecal material that accumulate in the water and sediments. In over 10 years, water quality conditions have become eutrophic with ammonia increasing by 56%, nitrite by 35%, nitrate by 90%, and phosphate by 67%. The addition of more fish pens and cages placed additional stress to this poorly flushed, shallow area that affected water quality due to changes in the water residence time.
Maria Lourdes San Diego-McGlone; Rhodora V Azanza; Cesar L Villanoy; Gil S Jacinto
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Publication Detail:
Type:  Journal Article     Date:  2008-05-05
Journal Detail:
Title:  Marine pollution bulletin     Volume:  57     ISSN:  0025-326X     ISO Abbreviation:  Mar. Pollut. Bull.     Publication Date:  2008  
Date Detail:
Created Date:  2008-06-16     Completed Date:  2008-10-01     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0260231     Medline TA:  Mar Pollut Bull     Country:  England    
Other Details:
Languages:  eng     Pagination:  295-301     Citation Subset:  IM    
Marine Science Institute(1), University of the Philippines, Diliman, Quezon City 1101, Philippines.
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MeSH Terms
Diatoms / physiology
Dinoflagellida / physiology
Fishes / physiology*
Oxygen / analysis
Pacific Ocean
Plankton / classification,  physiology
Population Density
Seawater / chemistry
Reg. No./Substance:

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