caa a22 4500 397551533 CHVBK 20180308164751.0 cr unu---uuuuu 161202e199604 xx s 000 0 eng 10.1006/jmsc.1996.0069 doi (NATIONALLICENCE)oxford-10.1006/jmsc.1996.0069 Evaluation of video and acoustic index methods for assessing reef-fish populations [Elektronische Daten] [Christopher T. Gledhill, Joanne Lyczkowski-Shultz, Kevin Rademacher, Eva Kargard, Gregg Crist, Mark A. Grace] Since 1991, the National Marine Fisheries Service (NMFS) has used a video camera/trap system to assess the relative abundance of reef fishes in the Gulf of Mexico occurring on natural hard-bottom substrata at depths between 9 m and 110 m. The relative index of reef-fish abundance resulting from these annual Gulf-wide surveys is based on counts of fish recorded during a 1 h set of a video camera on the bottom. During the 1993 reef-fish survey, a total of 115 reef sites were sampled with a video camera and fisheries acoustic system. Video data were used to identify fish species distributed above the bottom. Off-bottom fish included snappers (Lutjanidae), groupers (Serranidae), and amberjacks (Seriola spp.), species of interest to commercial and recreational fisheries. Correlation between total off-bottom taxa abundance and volume backscatter was low (r=0.41, n=115). The low correlation may be caused by differences in the area sampled by the video camera and acoustic systems at each site. The low correlation limits the use of acoustic data as an auxiliary variable in a combined video-acoustic estimator. © 1996 International Council for the Exploration of the Sea Regular Articles nationallicence fisheries acoustics nationallicence reef fish nationallicence video camera nationallicence Gledhill Christopher T. National Marine Fisheries Service, Southeast Fisheries Science Center, Mississippi Laboratories PO Drawer 1207, Pascagoula, MS 39568-1207, U.S.A. aut Lyczkowski-Shultz Joanne National Marine Fisheries Service, Southeast Fisheries Science Center, Mississippi Laboratories PO Drawer 1207, Pascagoula, MS 39568-1207, U.S.A. aut Rademacher Kevin National Marine Fisheries Service, Southeast Fisheries Science Center, Mississippi Laboratories PO Drawer 1207, Pascagoula, MS 39568-1207, U.S.A. aut Kargard Eva National Marine Fisheries Service, Southeast Fisheries Science Center, Mississippi Laboratories PO Drawer 1207, Pascagoula, MS 39568-1207, U.S.A. aut Crist Gregg National Marine Fisheries Service, Southeast Fisheries Science Center, Mississippi Laboratories PO Drawer 1207, Pascagoula, MS 39568-1207, U.S.A. aut Grace Mark A. National Marine Fisheries Service, Southeast Fisheries Science Center, Mississippi Laboratories PO Drawer 1207, Pascagoula, MS 39568-1207, U.S.A. aut ICES Journal of Marine Science Oxford University Press 53/2(1996-04), 483-485 1054-3139 53:2<483 1996 53 icesjms https://doi.org/10.1006/jmsc.1996.0069 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1006/jmsc.1996.0069 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gledhill Christopher T. National Marine Fisheries Service, Southeast Fisheries Science Center, Mississippi Laboratories PO Drawer 1207, Pascagoula, MS 39568-1207, U.S.A aut NATIONALLICENCE 700 1- Lyczkowski-Shultz Joanne National Marine Fisheries Service, Southeast Fisheries Science Center, Mississippi Laboratories PO Drawer 1207, Pascagoula, MS 39568-1207, U.S.A aut NATIONALLICENCE 700 1- Rademacher Kevin National Marine Fisheries Service, Southeast Fisheries Science Center, Mississippi Laboratories PO Drawer 1207, Pascagoula, MS 39568-1207, U.S.A aut NATIONALLICENCE 700 1- Kargard Eva National Marine Fisheries Service, Southeast Fisheries Science Center, Mississippi Laboratories PO Drawer 1207, Pascagoula, MS 39568-1207, U.S.A aut NATIONALLICENCE 700 1- Crist Gregg National Marine Fisheries Service, Southeast Fisheries Science Center, Mississippi Laboratories PO Drawer 1207, Pascagoula, MS 39568-1207, U.S.A aut NATIONALLICENCE 700 1- Grace Mark A. National Marine Fisheries Service, Southeast Fisheries Science Center, Mississippi Laboratories PO Drawer 1207, Pascagoula, MS 39568-1207, U.S.A aut NATIONALLICENCE 773 0- ICES Journal of Marine Science Oxford University Press 53/2(1996-04), 483-485 1054-3139 53:2<483 1996 53 icesjms Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford