These data were collected as part of a National Environmental Research Program (NERP) Marine Biodiversity Hub project (Theme 1 National Monitoring Evaluation and Reporting, Project 2 Analysis of approaches for monitoring biodiversity in Commonwealth Waters) undertaken in the Solitary Islands Region in August 2012. The Solitary Islands Key Ecological Feature (KEF) field survey had two broad objectives: 1) deploy and demonstrate various non-destructive field methods and 2) compare sampling patterns. These data comprise those collected using stereo-Baited Remote Underwater Video (stereo-BRUV). Four sixty minute stereo-BRUV drop replicates were deployed at two sites at each of five locations: 40 Acres Reef, Split Bommie, Patch, South and Relic Reef. There were 40 drops in total (4 x 2 x 5). An additional 23 drops were deployed at one of the locations (40 Acres Reef) to examine spatial autocorrelation.
The Solitary Islands Key Ecological Feature (KEF) field survey had two broad objectives: 1) deploy and demonstrate various non-destructive field methods and 2) compare sampling patterns. These data comprise those collected using stereo-Baited Remote Underwater Video (stereo-BRUV).
National Environmental Research Program (NERP) Any users of NERP Marine Biodiversity Hub data are required to clearly acknowledge the source of the material in the format: "Data was sourced from the NERP Marine Biodiversity Hub - the Marine Biodiversity Hub is supported through funding from the Australian Government's National Environmental Research Program (NERP), administered by the Department of Sustainability, Environment, Water, Population and Communities (DSEWPaC)." NSW Government
These data were collected using stereo baited remote underwater video units (stereo- BRUVs) to obtain accurate length measurements of selected fish. These units were SeaGIS Pty. Ltd diver stereo systems (http://www.seagis.com.au). Each diver stereo-video unit consisted of two Canon HG21 high definition video cameras in custom made SeaGIS underwater housing fitted to a hand-held base bar that overlaps the video taken by each camera (both cameras are angled in towards each other at a precise angle) and bolted into a steel frame. This allows photogrammetric principles to be applied using calibration files for both cameras. The calibration files are determined using a calibration cube that contains 80 precisely known reference points that is rotated through 20 different positions and loaded into the SeaGIS software CAL to provide a 3-dimensional calibration. Four BRUVs units were deployed at any one time and were deployed for 60 mins. Pilchard baits (approximately 1 kg) were mashed into a plastic mesh bait bag and wired to the end of each bait-pole (~1.5 m distance from the frame). Videos were analysed using Eventmeasure-stereo software and any observed fish species were recorded using a metric called MaxN (the Maximum number of individuals of a species in the frame at any one point in time). Video files from each camera were converted to high definition AVI files using Moyea MTS Converter (www.moyea.com) suitable for analysis in the SeaGIS software Eventmeasure-stereo 3.31. Both videos were synchronised using a spinning diode that was fixed in front of the camera and allowed frames from each camera to be matched. A calibration scale bar (with precise measurements between 3 known points) was used to ensure that the stereo video camera remained in calibration throughout the entire survey.