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Appl. Environ. Microbiol., Jan 1997, 133-138, Vol 63, No. 1
JH Paul, JB Rose, SC Jiang, P London, X Xhou and C Kellogg
Public concern over the discharge of primarily treated sewage by two
offshore outfalls in Mamala Bay, Oahu, prompted a multidisciplinary study
to determine the impact of such activities on the water quality in the bay
and at adjacent recreational beaches. As part of this study, we determined
the abundance of coliphage as an indicator of fecal pollution along with
total viral direct counts and phages infective for Vibrio parahaemoltyicus
16 at stations in Mamala Bay in four quarterly samplings over 13 months.
Coliphage (< 1 to 1.2 x 10(3)/liter) were found during each quarterly
sampling along an offshore transect to the Sand Island waste treatment
facility outfall. The nonpoint coastal stations (Pearl Harbor, Ala Wai
Canal, and Ke'ehi Lagoon) had high levels of coliphage during the storm
event sampling in February 1994 but much lower levels or none when sampled
during dry weather. Coliphage were absent at all samplings at Waikiki Beach
and at the control station off Diamond Head. Viral direct counts in
eutrophic coastal stations (Pearl Harbor, Ke'ehi Lagoon, Ala Moana Beach,
and Ala Wai canal) averaged 10(9)/liter, while counts at offshore stations
ranged from 9 x 10(7) to 1 x 10(9) viruses/liter, values similar to those
for other marine environments. Vibriophage were found mainly in eutrophic
coastal environments (Ala Wai Canal, Pearl Harbor, and Ke'ehi Lagoon) and
at the Sand Island Transect stations D1 and D2. The greatest abundance was
found during the storm event (February 1994) sampling. These results
suggest that the Sand Island outfall influenced the water quality of the
immediate surrounding waters but had little effect on the quality of the
recreational beaches. Nonpoint discharge sources appeared to be more
important in the distribution of fecal indicators in the coastal zone.
Copyright © 1997, American Society for Microbiology
Coliphage and indigenous phage in Mamala Bay, Oahu, Hawaii
Department of Marine Science, University of South Florida, St. Petersburg 33701, USA.
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