Seabird by-catch in longline fisheries
Metadata record for data from ASAC Project 2295\nSee the link below for public details on this project.\n\n --- Public Summary from Project --- \nLongline fisheries represent a serious threat to the survival of Southern Ocean albatrosses and petrels. During line setting operations seabirds become en...
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| Format: | Dataset |
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data.gov.au
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| Online Access: | https://researchdata.edu.au/seabird-by-catch-longline-fisheries/1930851 http://data.gov.au/dataset/eba9e705-88b8-4782-ab64-30b92b1c8f5d |
| Summary: | Metadata record for data from ASAC Project 2295\nSee the link below for public details on this project.\n\n --- Public Summary from Project --- \nLongline fisheries represent a serious threat to the survival of Southern Ocean albatrosses and petrels. During line setting operations seabirds become entangled with baited hooks and are drawn underwater and drown. In the past 10-20 years populations of some species have decreased at an alarming rate and some species are considered to be threatened with extinction. The Antarctic Divisions seabird by-catch program is attempting to minimise mortality in longline fisheries by a multi-faceted approach involving mitigation research on fishing vessels, research on seabirds and initiatives of a semi-political nature.\n\nWe chartered F/V Assassin for three days to trial a series of line weighting regimes under fishing conditions experienced in the east coast tuna fishery. Sink rates of lines with 52 combinations of swivel weight, bait type and bottom length were recorded.\n\nIn Mooloolaba they don't use leaded swivels. Therefore it is an unweighted snood.\n\nFiles\nTuncurry_order_of_sets.xls\nAssassin TDR metadata.xls\nindicate the factors tested in the experiment, and the order in which they were undertaken. The Tuncurry_order_of_sets.xls file is the order in which the snoods (numbered by regime code) were put out during each line set. Should be read in conjunction with the metadata file. The D1, D2, D3 numbers denote the end of a working day when we downloaded the data from the day's line sets (4 on day 1, 6 on day 2, 5 on day 3).\n\nFiles\nassassin summary means.xls\nassassin summary seconds to depth for analysis.xls\nassassin_means_to_depth.xls\nAssassin_time_to_depth_graphs.xls are files summarising the sink rates.\n\nThe folder\nFinal_data_files\ncontains all the raw time depth recorder files.\n\nThe fields in these datasets are:\n\nBait type YT - yellowtail, SM - slimy mackerel, SQ - squid, SA - Saury,\nLYT - Live Yellow Tail, LSM - Live Slimy Mackerel, DYT - Dead ... |
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