Search results
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Echo integration in low signal to noise regimes: methods of noise estimation and removal
Abstract: The results of acoustic surveys, especially in low signal-to-noise regimes, are ... contribution to the above-threshold-signal cannot later be removed in post processing. The only solution is to ... log unthresholded data and to correct for noise in post processing. Integrated data collected at 120 ... requires that logged data have high resolution in both depth and distance. It can be applied so long as ...
Meeting Document : WG-EMM-97/74 : Author(s): Higginbottom, I., Pauly, T.
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Revision of icefish (C. gunnari) stock estimate in the South Georgia area on the basis of the Russian trawl-acoustic survey 2002
Abstract: Revision of icefish (С.gunnari) stock estimate in South Georgia Area was caused by ... for target strength estimates using in situ measurement data; the combination of trawl and acoustic ... icefish target strength estimated obtained from in situ measurement data by bootstrap-method and biomass ... estimates and its statistical characteristics. Major sources of uncertainties in icefish stock estimates and ...
Meeting Document : WG-FSA-SAM-04/10 : Author(s): Gasyukov, P.S., Kasatkina, S.M.
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The applicability of international conservation instruments to the establishment of marine protected areas in Antarctica
, depending on their specific provisions, full application in Antarctic waters may be difficult, inappropriate ... concluded that although direct application of other international conservation agreements is in most cases ... timeframe in which these should take place. In addition, the consideration of Antarctic waters in parallel ... establishment of marine protected areas in Antarctica Approval: Approved ...
Meeting Document : WG-EMM-04/32 : Author(s): S. Grant (United Kingdom)
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Dense populations of the Antarctic scallop (Adamussium colbecki) in Terra Nova Bay (Subarea 88.1J): potential VMEs adjacent to the Terra Nova Bay ASPA (No. 161)
Mario Zucchelli is located, have been largely investigated in the last couple of decades. All the ... abundant and conspicuous species in the area, although some of its denser populations are found outside the ... perspectives. Particularly interesting is the evidence that populations in Terra Nova Bay area seem to be ... genetically different to some extent, and are even more different from those in the McMurdo Sound area ...
Meeting Document : WG-EMM-12/23 : Author(s): M. Chiantore and M. Vacchi (Italy)
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A multivariate approach to examining patterns in research fishing activities using the SSRU 88.2A–B North survey as an example
Abstract: The WG-SAM in 2016 “agreed the importance of identifying a set of diagnostics and clear ... criteria to assess the likelihood that a vessel is operating as would be expected in normal research ... activities”, further noting that a characterisation of fishing activities was also required in order to ... achieve such a goal (WG-SAM 2016, paragraph 4.19). In this paper, we further develop the analysis of Large ...
Meeting Document : WG-FSA-16/46 : Author(s): S. Mormede, A. Dunn, S.J. Parker, T. Earl, C. Darby, M. Söffker and O.R. Godø
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An illustrative management procedure for exploring dynamic feedback in krill catch limit allocations among small-scale management units
Abstract: A Management Procedure (MP) approach is proposed to assist in advising regarding the ... subdivision of the precautionary catch limit for krill among 15 small-scale management units (SSMUs) in the ... -species Operating Model (SMOM) developed in Plaganyi and Butterworth (2006) is used as an operating model ... the static allocation options, to ensure that the likely performances of these MPs in terms of low ...
Meeting Document : WG-EMM-06/28 : Author(s): É. Plagányi and D. Butterworth (South Africa)
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Estimating fishing gear selectivity for trawlers using length-frequency data from concurrent commercial trawl and longline fishing for Patagonian toothfish in Division 58.5.2 and the ratio of their hazard functions
quadratic function in length. This function was calibrated using random length frequency (LF) data collected ... fish falling in a particular length bin, analagous to a death in a given time interval in survival ... (GLMM). The GLMM was fitted to the number of fish in a bin using a complementary log-log link function ... and binomial sample size defined as the number of fish in that bin or a larger length bin. The ...
Meeting Document : WG-FSA-06/35 : Author(s): S.G. Candy (Australia)
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Towards the development of Marine Important Bird and Biodiversity Areas (mIBAs) for penguins in Antarctica – an update on progress
Bird and Biodiversity Areas (mIBAs) for penguins in Antarctica – an update on progress Approval ...
Meeting Document : WG-EMM-2019/30 : Author(s): J. Handley, M.-M. Rouyer, L. Pearmain, V. Warwick-Evans, P. Trathan and M.P. Dias
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Streamer lines to reduce seabird by-catch in longline fisheries
Abstract: This two-page flyer targets commercial longline fishermen in Alaska. Aspects of the ... streamer line developed in the course of research in Alaskan demersal longline fisheries are described ... reduce seabird by-catch in longline fisheries Approval: Approved ...
Meeting Document : WG-FSA-03/18 : Author(s): E.F. Melvin (USA)
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Options for allocating the precautionary catch limit of krill among small-scale management units in the Scotia Sea
-XXI. The first three are static allocations: the first is proportional to estimated predator demand in ... each SSMU; the second is proportional to the estimated standing stock of krill in each SSMU; and the ... third is proportional to the standing stock less predator demand in each SSMU. The fourth option is a ... dynamic allocation based on land-based predator monitoring conducted just prior to or early in the fishing ...
Meeting Document : WG-EMM-03/36 : Author(s): R.P. Hewitt, G. Watters (USA) and P.N. Trathan (United Kingdom)