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 103/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 109/liter, while counts at offshore stations ranged from 9 x 107 to 1 x 109 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. (...)
Mots-clés Pascal : Baie, Hawaï, Polynésie, Océanie, En mer, Qualité eau, Eau mer, Coliphage, Bactériophage, Virus, Indicateur biologique, Pollution eau, Rejet eau usée
Mots-clés Pascal anglais : Bay, Hawaii, Polynesia, Oceania, Offshore, Water quality, Seawater, Coliphage, Phage, Virus, Biological indicator, Water pollution, Waste water discharge
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 97-0077932
Code Inist : 002A05C09. Création : 21/05/1997.