WRRCTMR No.65 Benthic Ecosystem and Fish Population Off the Mokapu Outfall: A Third Post-Installation Study

Simple item page
dc.contributor.authorRusso, Anthony R.
dc.contributor.authorDollar, Steven J.
dc.contributor.authorKay, E. Alison
dc.date.accessioned2008-09-18T02:23:50Z
dc.date.available2008-09-18T02:23:50Z
dc.date.issued1981-06
dc.description.abstractAn ecological study of the benthic and fish communities at Mokapu, O’ahu, was completed in the summer of 1980 approximately three years subsequent to the installation of an ocean outfall by the City and County of Honolulu. Data were obtained from five transects between Mokapu Point on the northeastern tip of O’ahu to Alala Point, approximately 6 034 m (3.75 miles) south, at depths of 6 to 24 m (20-80 ft). This study is subsequent to an initial survey completed in 1975 prior to outfall construction. Result, show little or no effect from the operation of the outfall on the benthic and fish communities. There are no significant differences in the abundance, diversity, or composition of fishes from 1975 to 1980 except at the outfall site where new substrate was formed by construction. Between the 1975 and 1980 studies there are some differences in coral species cover indices, which are attributed to patchy substrate distribution rather than stress from the sewage outfall. Differences in species composition and distribution of micromolluscan assemblages may also be explained, at least in part, by patchy distribution of the substrate. Analysis of micromollusk assemblages shows that the proportions of dominant species in the assemblages of shallow and deep waters sites have remained constant over the years of study. In general the biotic community has not changed in the area studied over three years and equilibrium seems to have been reached in the benthic and fish communities at least for the present. The construction of the outfall, surrounding rock substrate, and the swift removal of effluent by vigorous water movement have contributed, in the case of fish populations at least, to increases in abundance.
dc.description.sponsorshipDepartment of Public Works City and County of Honolulu Grant/Contract No. F-637-78
dc.format.extentviii + 35 pages
dc.identifier.citationRusso AR, Dollar SJ, Kay EA. 1981. Benthic ecosystem and fish population off the Mokapu outfall: a third post-installation study. Honolulu (HI): Water Resources Research Center, University of Hawaii at Manoa. WRRC technical memorandum report, 65.
dc.identifier.urihttp://hdl.handle.net/10125/2547
dc.language.isoen-US
dc.publisherWater Resources Research Center, University of Hawaii at Manoa
dc.relation.ispartofseriesWRRC Technical Memorandum Report
dc.relation.ispartofseries65
dc.subjectfish populations
dc.subjectcoral
dc.subjectalgae
dc.subjectwaste water disposal
dc.subjectHawaii
dc.subjectmicromollusks
dc.subjectMokapu Outfall
dc.subjectOahu
dc.subject.lcshBenthos -- Hawaii -- Oahu.
dc.subject.lcshCoral reef animals -- Hawaii -- Oahu.
dc.subject.lcshFish populations -- Hawaii -- Oahu.
dc.subject.lcshMarine animals -- Effect of water pollution on.
dc.subject.lcshMarine ecology -- Hawaii -- Oahu.
dc.subject.lcshMokapu Peninsula (Hawaii)
dc.subject.lcshOcean outfalls -- Environmental aspects -- Hawaii -- Oahu.
dc.subject.lcshSewage disposal in the ocean -- Environmental aspects.
dc.titleWRRCTMR No.65 Benthic Ecosystem and Fish Population Off the Mokapu Outfall: A Third Post-Installation Study
dc.typeReport
dc.type.dcmiText

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
wrrctmr65.pdf
Size:
1.43 MB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

WRRC Technical Memorandum Reports