Evaluating the use of onboard cameras in the Shark Gillnet Fishery in South Australia
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2.1.1.2 Data collectionThe trials were conducted between September 2010 and September 2011 on five gillnet fishing boats that were selected to participate based on their history of fishing activity in the ASL Management Zone. The CCTV cameras (Figure 4) were mounted in elevated positions with camera angles that allow coverage of the net as it left the water and came over the net roller, a wide view covering the deck of the boat, and a narrow view of the deck or sorting station to allow for species identification (Figure 5). Care was taken to ensure the cameras did not constrain normal fishing operations, did not catch the fishing gear, did not pose a health and safety risk to crew, and would not be obstructed by fishing equipment or other parts of the boat. The cameras were also mounted in a way that avoids water remaining in front of the lens. Desiccants helped limit any condensation inside the camera housings, and sunshades were also fixed in place inside the housings to limit glare from the sun. Video recording was set to 5 frames per second with 640x480 pixels images and a dynamic image compression ratio. The satellite transceiver modem was set to send status reports to AFMA on an hourly basis during times the electronic monitoring system was in operation. These reports were a synopsis of the previous hour’s sensor data and included boat location, activity and system operational status. This information was also used to monitor remaining hard drive storage, to troubleshoot technical problems and to prioritise service events. Health Statement Viewer software developed by AMR was used to determine place and time of fishing activity on a near real-time basis. This software displays hourly packets of information sent to AFMA via satellite modem by the electronic monitoring system. These hourly data are also recorded to the hard drive in the boat together with the high resolution 10 second interval data. Time, date and boat information are hot-stamped on the video footage to allow AFMA determine the exact time and location of any interactions occurring with protected species when footage is reviewed.  
Figure 4: Closed circuit television cameras mounted on Commonwealth fishing boats as part of electronic monitoring systems Directory: wp-content -> uploads -> 2011 2011 -> Voices of the Old Sea Norman Lewis 2011 -> Malevil Robert Merle 2011 -> The Elephant Keeper’s Children Peter Hoeg 2011 -> Jv packet •Mars Colonization Affirmative •Mars Colonization Negative 2011 -> Registration Form (Rev. 8-86) omb no. 1024-0018 2011 -> All America Looks Up to Virginia;” Virginia and the Declaration of Independence 2011 -> Rao bulletin 2011 -> Christopher Columbus was born between 25 August and 31 October 1451 in 2011 -> The Battle of Frenchtown (1855), Washington Territory: the Political and Demographic Context rev 9/4/11 2011 -> Seti aff •seti neg •Asteroids Aff Download 4.23 Mb. Share with your friends:
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