Project Report PR-94-02
An Analysis of the Fish Communities Along the Barbers Point Deep Ocean Outfall, Oahu, Hawaii, Using Remote Video, 1992 Data
Richard E. Brock
August 1993
ABSTRACT
Because the diffuser of the Barbers Point deep ocean outfall lies below safe diving depths, a remotely controlled video camera system was used to determine the status of the marine fish communities and selected diurnally exposed macroinvertebrate species resident to the diffuser. Video reconnaissance was completed over the entire 533-m diffuser length. Three visual “transects,” which “sampled” approximately 31% of the total diffuser length, were established on the diffuser pipe. Video sampling of the diffuser fish communities was carried out on 12 January 1992. Twenty-two fish species (928 individual fish) having an estimated standing crop ranging from 13 to 51 g/m2 (mean 35 g/m2) were censused. In this census one “new” fish species was encountered for every 8.9 m2 of substratum sampled, and one fish was seen for every 0.4 m2. After future Data collections are made, comparisons between annual surveys will be possible.