Search results
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Using the EPOC modelling framework to assess management procedures for Antarctic krill in Statistical Area 48: evaluating spatial differences in productivity of Antarctic krill
development of a harvest strategy are whether (i) spatial differences in the productivity of krill give rise ... regional differences in krill dynamics and cause differential impacts on predators as a result ... , particularly as the fishery expands to take the large-scale catch limit. A fourth issue is to determine whether ... Productivity, Ocean and Climate (EPOC) modelling framework to develop a spatially explicit model of Antarctic ...
Meeting Document : WG-EMM-06/38 Rev. 1 : Author(s): A.J. Constable (Australia)
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Beach debris survey Signy Island, South Orkney Islands, 2002/03
and size categories. A total of 54 items weighing 27.36kg were collected. The number of items found ... continued the change in trend that began last season in what had otherwise been a declining trend since 1993 ... /94. Such a continued increase in the number of these packaging bands found indicates that the ban on ... longevity of plastics and other materials with a high resistance to degradation in the marine environment ...
Meeting Document : SC-CAMLR-XXII/BG/12 : Author(s): Delegation of the United Kingdom
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Conservation of Antarctic pack-ice seals with increasing krill fishing and environmental change
. For Antarctic pack-ice seals, a main group of krill predators, we report the spatial density and krill ... suitable seal habitat has declined between 21 and 28% over a 30 year period; krill density has potentially ... , a critical source of krill for the Antarctic Peninsula and elsewhere. This area has the highest seal ... and in their environmental drivers calls for a precautionary management approach, in the absence of ...
Meeting Document : WS-MPA-11/24 : Author(s): J. Forcada, P.N. Trathan (UK), P.L. Boveng (USA), I.L. Boyd (UK), D.P. Costa (USA), M. Fedak (UK), T.L. Rogers and C.J. Southwell (Australia)
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An Apparent Decrease in the Prevalence of “Ross Sea Killer Whales” in the Southern Ross Sea
decreased; prevalence as indicated by casual observations from helicopter pilots flying over the area on a ... daily basis has also decreased in nearby McMurdo Sound. Consistent with a decrease in the catch-per-unit ... change in Ross Sea killer whale numbers in the southern Ross Sea is related to a industrial fishery ... . Therefore, we propose, the Ross Sea killer whales have opted to move elsewhere in a scenario consistent with ...
Meeting Document : WG-EMM-09/P01 : Author(s): D.G. Ainley, G. Ballard and S. Olmastroni
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An assessment of longlining operations for Dissostichus eleginoides on board the Chilean-registered longliner BF Cisne Verde during March–May 1997 around South Georgia (Subarea 48.3)
Abstract: Long-lining operations from a single vessel fishing for Dissostichus eleginoides off ... extinguished to mitigate against bird mortality. Data were recorded during hauling using a randomised cluster ... sampling method; the known number of coils laid during a night's setting operations provided the ... . Previous catch rates were used to set daily sampling effort, and accurately achieved a CCAMLR sampling ...
Meeting Document : WG-FSA-97/41 : Author(s): Ashford, J.R., Everson, I.
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Report on bottom fisheries and vulnerable marine ecosystems: draft template and workplan
Abstract: The WG-FSA Subgroup on VMEs was tasked with providing a draft template of a Report on ... Vulnerable Marine Ecosystems to WG-EMM and WG-FSA in 2010. This paper provides a draft template, including ... Scientific Committee and its working groups have been embedded within this structure in order to give them a ... arise from WG-FSA. It is envisaged that, following comments by WG-EMM, a draft report will be generated ...
Meeting Document : WG-EMM-10/15 : Author(s): WG-FSA Subgroup on VMEs
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Using outputs from spatial population models of Antarctic toothfish in the Ross Sea region to investigate potential biases in the single population model
Abstract: We present a method to evaluate potential biases and uncertainty in the tagging ... were then used in a single area stock assessment model derived from the stock assessment model of ... historical footprint of the fishery. However, the results when using a similar model that allowed for fish to ... provide a useful tool to evaluate potential bias and uncertainty in our understanding of the stock ...
Meeting Document : WG-FSA-12/45 : Author(s): S. Mormede and A. Dunn (New Zealand)
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Physical and behavioural influences on larval fish retention: contrasting patterns in two Antarctic fishes
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 ... larvae was predicted to be 5.3%, considerably lower than that of C. gunnari (31.3%), a difference related ... contribution to overall retention from spawning sites on the southwest South Georgia shelf. In addition, a ...
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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New possibilities of krill-dependent indicator species monitoring – UAV survey in Subarea 48.1
34.51 km 2. Images were taken with digital SLR Canon 700D, Nikon D5100, Canon T5i 700D with a 35mm ... objective lens. Flights altitude at 350 – 550 m AGL (Above Ground Level) allowed images to be taken with a ... software. In selected colonies a comparison with the results of measurements taken at the same time from ... distribution of krill-depended indicator species in Subarea 48.1. Author(s): M. Korczak-Abshire, A. Zmarz, M ...
Meeting Document : WG-EMM-17/03 : Author(s): M. Korczak-Abshire, A. Zmarz, M. Rodzewicz, R. Storvold, M. Kycko, I. Karsznia, A. Kidawa and K.J. Chwedorzewska
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Preliminary assessment models of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea including data from the 2005/06 season
in a similar, though slightly higher, estimate of initial and current biomass as the 2005 base case ... modifying the estimates from the models, suggesting that the new data had a similar pattern to that of ... ‘all vessels’ tagging data resulted in a much more optimistic assessment, but was due to the increased ... a more optimistic estimate of B0. However, as the changes in growth, length-weight, and M all imply ...
Meeting Document : WG-FSA-SAM-06/11 : Author(s): Dunn, A. & Hanchet, S.M.