Search results
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An ecosystem-based management procedure for krill fisheries: a method for determining spatially-structured catch limits to manage risk of significant localised fisheries impacts on predators
single-species assessment of yield, and a method for implementing the procedure. The decision rule for ... setting catch limits for a given harvest strategy has a straight forward expression of the target ... conditions to be achieved and the uncertainties that need to be managed and does not assume an understanding ... of predator-prey dynamics beyond that evident in the data. It is a natural extension of the current ...
Meeting Document : WG-EMM-15/36 : Author(s): A. Constable and S. Candy (Australia)
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Revised assessment models for Patagonian toothfish in research block C of Division 58.4.4, Ob and Lena Banks
assessments of Dissostichus eleginoides in research block C in Division 58.4.4 b following the recommendation ... during the latest WG-SAM meeting. The six models with three kinds of assumptions on IUU catch were ... arranged referring to WG-SAM-14/18 as follows: 1) catch at length/age models on the assumption of no IUU ... within the model using disease mortality functionality (Len_2/AgeSing_2 models), 3) catch at length/age ...
Meeting Document : WG-FSA-14/23 : Author(s): K. Taki (Japan)
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Best practice seabird by-catch mitigation for Spanish-rig longline vessels with emphasis on line weighting regimes
Abstract: The Spanish system is used in a range of demersal and semi-pelagic longline fisheries ... throughout the southern hemisphere and has been the source of a large number of seabird fatalities. An ... experiment was conducted on a chartered Spanish-rig vessel to improve the sink rate of longlines to reduce ... interactions with seabirds. The benchmark sink rate was that of integrated weight (IW) longlines, as used by ...
Meeting Document : WG-FSA-06/22 : Author(s): G. Robertson (Australia), C.A. Moreno (Chile), B. Wienecke (Australia), P. Gandini (Argentina), G. McPherson (Australia) and J.-P. Seco Pon (Argentina)
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Cruise Report – Research Project: Demersal finfish distribution, abundance, and their biological characteristics in Statistical Subareas 48.1 (northern area) and 48.2
48.2 (South Orkney Island). The sampling stations were set in approximately the same geographical ... , 2012) and on shelf areas of the South Orkney Islands according to a subsample of stations sampled by ... the R/V ' Yuzhmorgeologiya ' (Jones & Kock, 2009). The cruise took place 6-27 January ... , 2018, primarily using a Hardbottom Snapper trawl (NET Systems, Inc.), previously used by the US AMLR ...
Meeting Document : WG-SAM-18/25 : Author(s): Delegation of Chile
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Filling knowledge gaps east in Dronning Maud Land to inform MPA planning by CCAMLR (ECOgaps): Norwegian cruise to DML 2019
Abstract: The aim of the ECOgaps is to improve the knowledgebase on physical conditions and biota ... east of the 0 meridian in the MPA planning Domain 4. Focusing on the Astrid ridge, the continental ... shelf off of Dronning Maud Land, and the Maud rise, multidisciplinary investigations will be conducted ... in 2019 by the RV Kronprins Haakon. In this working document, the cruise being planned is outlined ...
Meeting Document : WG-EMM-18/13 : Author(s): H. Steen, A. Lowther and O.A. Bergstad
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Chilean NPOA-Seabirds: first steps
Abstract: The progresses in the developing of the Chilean NPOA-S are described. At the moment, an ... Executive and a Technical Group have been constituted. First steps taken had been the selection of ... mitigation measures to be applied; the design of experiments to test specific combinations of mitigation ... measures, and the discussion of the Objectives and Goals of the NPOA-S. The final draft of the NPOA-S will ...
Meeting Document : WG-FSA-04/14 : Author(s): C.A. Moreno and J. Arata (Chile)
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Physical and behavioural influences on larval fish retention: contrasting patterns in two Antarctic fishes
Abstract: Waters around South Georgia are amongst the most productive in the Southern Ocean, and ... retention of the planktonic stages (eggs and larvae) of marine fish can play a key role in the maintenance ... of adult stocks. Here we use a numerical modelling approach to examine the influence of oceanographic ... and life history variability on the dispersal and retention of two species of Antarctic fish ...
Meeting Document : WG-FSA-12/P10 : Author(s): E.F. Young, J. Rock, M.P. Meredith, M. Belchier, E.J. Murphy and G.R. Carvalho
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Climate change and precautionary spatial protection: ice shelves
Abstract: Regional climate change is now known to be well established in the Antarctic ... , particularly in the Antarctic Peninsula region. One of the most evident signs of climate change has been ice ... shelf collapse; overall, 87% of the Peninsula’s glaciers have retreated in recent decades. Ice shelf ... may simply include species from areas that are immediately adjacent to the collapsed ice shelf ...
Meeting Document : WS-MPA-11/17 : Author(s): P.N. Trathan and S.M. Grant (UK)
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Orientation of Antarctic krill in an aquarium
Abstract: Acoustic methods appear to be the best way to estimate Antarctic krill abundance ... aquarium aboard the R. V. Kaiyo Maru. Average body orientation was 45.6° (SD = 19.6°, N= 67), which was ... would tend to reduce the reflected echo intensity when compared to animals swimming horizontally ... . Although mature females with marked swelling of the cephalothorax were not included in the experiment, the ...
Meeting Document : WG-KRILL-93/24 : Author(s): Y. Endo (Japan)
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Entanglement in man-made debris of Antarctic fur seals at Bird Island, South Georgia
Abstract: The incidence of entanglement in man-made debris by Antarctic fur seals (Arctocephalus ... gazella) at Bird Island, South Georgia, was monitored throughout the austral winter and summer of 1990/91 ... as part of an ongoing study by the British Antarctic Survey. A minimum of 8 seals were sighted ... entangled, 7 (88%) of which had their neck collars removed, during the winter months (April – October ...
Meeting Document : CCAMLR-X/BG/05 : Author(s): Delegation of UK